diff --git a/01-introduction.html b/01-introduction.html
index 12ff33f51..761e09f0d 100644
--- a/01-introduction.html
+++ b/01-introduction.html
@@ -511,7 +511,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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@@ -534,7 +534,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/01-introduction.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/02-image-basics.html b/02-image-basics.html
index d9af1c0e3..fc474615d 100644
--- a/02-image-basics.html
+++ b/02-image-basics.html
@@ -579,7 +579,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Further explanation </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>In the example above, form 1 loads the entire scikit-image library
 into the program as an object. Individual modules of the library are
@@ -750,7 +750,7 @@ <h3 class="callout-title">Changing Pixel Values (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>There are many possible solutions, but one method would be . . .</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -977,7 +977,7 @@ <h3 class="callout-title">Thinking about RGB colours (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>(255, 0, 0) represents red, because the red channel is maximised,
 while the other two channels have the minimum values.</li>
@@ -1021,7 +1021,7 @@ <h3 class="callout-title">RGB colour table (optional, not included in timing)</h
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>There are 24 total bits in an RGB colour of this type, and each bit
 can be on or off, and so there are 2<sup>24</sup> = 16,777,216 possible
@@ -1163,7 +1163,7 @@ <h3 class="callout-title">BMP image size (optional, not included in timing)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In such an image, there are 5,000 × 5,000 = 25,000,000 pixels, and 24
 bits for each pixel, leading to 25,000,000 × 24 = 600,000,000 bits, or
@@ -1263,7 +1263,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>The BMP file, <code>ws.bmp</code>, is 75,000,054 bytes, which matches
 our prediction very nicely. The JPEG file, <code>ws.jpg</code>, is
@@ -1307,7 +1307,7 @@ <h3 class="callout-title">Comparing lossless versus lossy compression (optional,
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>Here is a partial directory listing, showing the sizes of the
 relevant files there:</p>
@@ -1534,7 +1534,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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@@ -1557,7 +1557,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/02-image-basics.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-18",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/03-skimage-images.html b/03-skimage-images.html
index e5daa3b23..1de8f7794 100644
--- a/03-skimage-images.html
+++ b/03-skimage-images.html
@@ -1041,7 +1041,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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@@ -1064,7 +1064,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/03-skimage-images.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-07",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/04-drawing.html b/04-drawing.html
index c7b38500a..5df39f00f 100644
--- a/04-drawing.html
+++ b/04-drawing.html
@@ -999,7 +999,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 	<div id="to-top">
@@ -1022,7 +1022,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/04-drawing.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-07",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/05-creating-histograms.html b/05-creating-histograms.html
index ee613a20f..a9f5791f3 100644
--- a/05-creating-histograms.html
+++ b/05-creating-histograms.html
@@ -548,7 +548,7 @@ <h3 class="callout-title">Using a mask for a histogram (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -744,7 +744,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -848,7 +848,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -871,7 +871,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/05-creating-histograms.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-14",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/06-blurring.html b/06-blurring.html
index a95a2dbcd..ef3863ed2 100644
--- a/06-blurring.html
+++ b/06-blurring.html
@@ -776,7 +776,7 @@ <h3 class="callout-title">Experimenting with sigma values (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Generally speaking, the larger the sigma value, the more blurry the
 result. A larger sigma will tend to get rid of more noise in the image,
@@ -807,7 +807,7 @@ <h3 class="callout-title">Experimenting with kernel shape (10 min - optional, no
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb13">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -895,7 +895,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -918,7 +918,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/06-blurring.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-18",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/07-thresholding.html b/07-thresholding.html
index 4e76ea9b8..abb0162a5 100644
--- a/07-thresholding.html
+++ b/07-thresholding.html
@@ -578,7 +578,7 @@ <h3 class="callout-title">More practice with simple thresholding (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The histogram for the <code>data/shapes-02.jpg</code> image can be
 shown with</p>
@@ -629,7 +629,7 @@ <h3 class="callout-title">More practice with simple thresholding (15
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here are the commands to create and view the binary mask</p>
 <div class="codewrapper sourceCode" id="cb8">
@@ -907,7 +907,7 @@ <h3 class="callout-title">Ignoring more of the images – brainstorming (10 min)
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>One approach we might take is to try to completely mask out a region
 from each image, particularly, the area containing the white circle and
@@ -964,7 +964,7 @@ <h3 class="callout-title">Ignoring more of the images – implementation (30 min
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>We can apply a simple binary thresholding with a threshold
 <code>t=0.95</code> to remove the label and circle from the image. We
@@ -1020,7 +1020,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> What is &amp; doing in the example above? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
 <div class="accordion-body">
 <p>The <code>&amp;</code> operator above means that we have defined a
 logical AND statement. This combines the two tests of pixel intensities
@@ -1079,7 +1079,7 @@ <h3 class="callout-title">Thresholding a bacteria colony image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>Here is the code to create the grayscale histogram:</p>
 <div class="codewrapper sourceCode" id="cb23">
@@ -1175,7 +1175,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1198,7 +1198,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/07-thresholding.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/08-connected-components.html b/08-connected-components.html
index d0aff9e56..6a0c0cae3 100644
--- a/08-connected-components.html
+++ b/08-connected-components.html
@@ -526,7 +526,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <ol start="2" style="list-style-type: lower-alpha"><li>5</li>
 </ol></div>
@@ -554,7 +554,7 @@ <h3 class="callout-title">Object counting (optional, not included in
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: lower-alpha"><li>2</li>
 </ol></div>
@@ -692,7 +692,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Do you see an empty image? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>If you are using an older version of Matplotlib you might get a
 warning
@@ -795,7 +795,7 @@ <h3 class="callout-title">How many objects are in that image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>As you might have guessed, the return value <code>count</code>
 already contains the number of objects found in the image. So it can
@@ -906,7 +906,7 @@ <h3 class="callout-title">Plot a histogram of the object area distribution (10 m
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>The histogram can be plotted with</p>
 <div class="codewrapper sourceCode" id="cb22">
@@ -959,7 +959,7 @@ <h3 class="callout-title">Filter objects by area (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>One way to count only objects above a certain area is to first create
 a list of those objects, and then take the length of that list as the
@@ -1047,7 +1047,7 @@ <h3 class="callout-title">Remove small objects (20 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>To remove the small objects from the labeled image, we change the
 value of all pixels that belong to the small objects to the background
@@ -1151,7 +1151,7 @@ <h3 class="callout-title">Colour objects by area (optional, not included in timi
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution7" aria-expanded="false" aria-controls="collapseSolution7">
   <h4 class="accordion-header" id="headingSolution7"> Show me the solution </h4>
 </button>
-<div id="collapseSolution7" class="accordion-collapse collapse" data-bs-parent="#accordionSolution7" aria-labelledby="headingSolution7">
+<div id="collapseSolution7" class="accordion-collapse collapse" aria-labelledby="headingSolution7" data-bs-parent="#accordionSolution7">
 <div class="accordion-body">
 <p>We already know how to get the areas of the objects from the
 <code>regionprops</code>. We just need to insert a zero area value for
@@ -1259,7 +1259,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1282,7 +1282,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/08-connected-components.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/09-challenges.html b/09-challenges.html
index f69c59563..f467b146e 100644
--- a/09-challenges.html
+++ b/09-challenges.html
@@ -411,7 +411,7 @@ <h3 class="callout-title">Morphometrics for bacterial colonies</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>First, let’s work through the process for one image:</p>
 <div class="codewrapper sourceCode" id="cb1">
@@ -553,7 +553,7 @@ <h3 class="callout-title">Colony counting with minimum size and automated thresh
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here is a modified function with the requested features. Note when
 calculating the Otsu threshold we don’t include the very bright pixels
@@ -639,7 +639,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -662,7 +662,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/09-challenges.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/404.html b/404.html
index ee97a9c63..7f728b290 100644
--- a/404.html
+++ b/404.html
@@ -379,7 +379,7 @@ <h1>Page not found</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -401,8 +401,8 @@ <h1>Page not found</h1>
   "url": "https://datacarpentry.github.io/image-processing/404.html",
   "identifier": "https://datacarpentry.github.io/image-processing/404.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 14c871f25..98421e68b 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
@@ -389,7 +389,7 @@ <h1>Contributor Code of Conduct</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -412,7 +412,7 @@ <h1>Contributor Code of Conduct</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/CODE_OF_CONDUCT.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-25",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/LICENSE.html b/LICENSE.html
index 9b9cfebcb..a32f8f61f 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -437,7 +437,7 @@ <h1>Licenses</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -460,7 +460,7 @@ <h1>Licenses</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/LICENSE.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-25",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index d52013c83..9f86b99ab 100644
--- a/aio.html
+++ b/aio.html
@@ -771,7 +771,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Further explanation </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>In the example above, form 1 loads the entire scikit-image library
 into the program as an object. Individual modules of the library are
@@ -942,7 +942,7 @@ <h3 class="callout-title">Changing Pixel Values (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>There are many possible solutions, but one method would be . . .</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -1178,7 +1178,7 @@ <h3 class="callout-title">Thinking about RGB colours (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>(255, 0, 0) represents red, because the red channel is maximised,
@@ -1224,7 +1224,7 @@ <h3 class="callout-title">RGB colour table (optional, not included in timing)</h
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>There are 24 total bits in an RGB colour of this type, and each bit
 can be on or off, and so there are 2<sup>24</sup> = 16,777,216 possible
@@ -1397,7 +1397,7 @@ <h3 class="callout-title">BMP image size (optional, not included in timing)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In such an image, there are 5,000 × 5,000 = 25,000,000 pixels, and 24
 bits for each pixel, leading to 25,000,000 × 24 = 600,000,000 bits, or
@@ -1501,7 +1501,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>The BMP file, <code>ws.bmp</code>, is 75,000,054 bytes, which matches
 our prediction very nicely. The JPEG file, <code>ws.jpg</code>, is
@@ -1545,7 +1545,7 @@ <h3 class="callout-title">Comparing lossless versus lossy compression (optional,
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>Here is a partial directory listing, showing the sizes of the
 relevant files there:</p>
@@ -3273,7 +3273,7 @@ <h3 class="callout-title">Using a mask for a histogram (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3473,7 +3473,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3978,7 +3978,7 @@ <h3 class="callout-title">Experimenting with sigma values (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Generally speaking, the larger the sigma value, the more blurry the
 result. A larger sigma will tend to get rid of more noise in the image,
@@ -4009,7 +4009,7 @@ <h3 class="callout-title">Experimenting with kernel shape (10 min - optional, no
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb13">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -4301,7 +4301,7 @@ <h3 class="callout-title">More practice with simple thresholding (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The histogram for the <code>data/shapes-02.jpg</code> image can be
 shown with</p>
@@ -4352,7 +4352,7 @@ <h3 class="callout-title">More practice with simple thresholding (15
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here are the commands to create and view the binary mask</p>
 <div class="codewrapper sourceCode" id="cb8">
@@ -4637,7 +4637,7 @@ <h3 class="callout-title">Ignoring more of the images – brainstorming (10 min)
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>One approach we might take is to try to completely mask out a region
 from each image, particularly, the area containing the white circle and
@@ -4696,7 +4696,7 @@ <h3 class="callout-title">Ignoring more of the images – implementation (30 min
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>We can apply a simple binary thresholding with a threshold
 <code>t=0.95</code> to remove the label and circle from the image. We
@@ -4752,7 +4752,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> What is &amp; doing in the example above? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
 <div class="accordion-body">
 <p>The <code>&amp;</code> operator above means that we have defined a
 logical AND statement. This combines the two tests of pixel intensities
@@ -4831,7 +4831,7 @@ <h3 class="callout-title">Thresholding a bacteria colony image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>Here is the code to create the grayscale histogram:</p>
 <div class="codewrapper sourceCode" id="cb23">
@@ -5079,7 +5079,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <ol start="2" style="list-style-type: lower-alpha">
 <li>5</li>
@@ -5111,7 +5111,7 @@ <h3 class="callout-title">Object counting (optional, not included in
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: lower-alpha">
 <li>2</li>
@@ -5253,7 +5253,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Do you see an empty image? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>If you are using an older version of Matplotlib you might get a
 warning
@@ -5356,7 +5356,7 @@ <h3 class="callout-title">How many objects are in that image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>As you might have guessed, the return value <code>count</code>
 already contains the number of objects found in the image. So it can
@@ -5471,7 +5471,7 @@ <h3 class="callout-title">Plot a histogram of the object area distribution (10 m
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>The histogram can be plotted with</p>
 <div class="codewrapper sourceCode" id="cb22">
@@ -5526,7 +5526,7 @@ <h3 class="callout-title">Filter objects by area (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>One way to count only objects above a certain area is to first create
 a list of those objects, and then take the length of that list as the
@@ -5616,7 +5616,7 @@ <h3 class="callout-title">Remove small objects (20 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>To remove the small objects from the labeled image, we change the
 value of all pixels that belong to the small objects to the background
@@ -5720,7 +5720,7 @@ <h3 class="callout-title">Colour objects by area (optional, not included in timi
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution7" aria-expanded="false" aria-controls="collapseSolution7">
   <h4 class="accordion-header" id="headingSolution7"> Show me the solution </h4>
 </button>
-<div id="collapseSolution7" class="accordion-collapse collapse" data-bs-parent="#accordionSolution7" aria-labelledby="headingSolution7">
+<div id="collapseSolution7" class="accordion-collapse collapse" aria-labelledby="headingSolution7" data-bs-parent="#accordionSolution7">
 <div class="accordion-body">
 <p>We already know how to get the areas of the objects from the
 <code>regionprops</code>. We just need to insert a zero area value for
@@ -5864,7 +5864,7 @@ <h3 class="callout-title">Morphometrics for bacterial colonies</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>First, let’s work through the process for one image:</p>
 <div class="codewrapper sourceCode" id="cb1">
@@ -6006,7 +6006,7 @@ <h3 class="callout-title">Colony counting with minimum size and automated thresh
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here is a modified function with the requested features. Note when
 calculating the Otsu threshold we don’t include the very bright pixels
@@ -6083,7 +6083,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -6106,8 +6106,8 @@ <h3 class="callout-title">Key Points</h3>
   "url": "https://datacarpentry.github.io/image-processing/aio.html",
   "identifier": "https://datacarpentry.github.io/image-processing/aio.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/discuss.html b/discuss.html
index 0149c3c1e..24eb9e6e1 100644
--- a/discuss.html
+++ b/discuss.html
@@ -409,7 +409,7 @@ <h1>Discussion</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -432,7 +432,7 @@ <h1>Discussion</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/discuss.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/edge-detection.html b/edge-detection.html
index 11b5527eb..926f06c68 100644
--- a/edge-detection.html
+++ b/edge-detection.html
@@ -825,7 +825,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -848,7 +848,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/edge-detection.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-08-16",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/images.html b/images.html
index 0edb3b3eb..3c0d177f8 100644
--- a/images.html
+++ b/images.html
@@ -751,7 +751,7 @@ <h3 id="09-challenges-figure-10">Figure 10</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -774,8 +774,8 @@ <h3 id="09-challenges-figure-10">Figure 10</h3>
   "url": "https://datacarpentry.github.io/image-processing/images.html",
   "identifier": "https://datacarpentry.github.io/image-processing/images.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/index.html b/index.html
index 0fe257ff4..a418becc1 100644
--- a/index.html
+++ b/index.html
@@ -447,7 +447,7 @@ <h3 class="accordion-header" id="headingSpoiler1">
   Instructions for Linux &amp; Mac
   </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>Open a terminal and type <code>jupyter lab</code>.</p>
 </div>
@@ -462,7 +462,7 @@ <h3 class="accordion-header" id="headingSpoiler2">
   Instructions for Windows
   </h3>
 </button>
-<div id="collapseSpoiler2" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler2" aria-labelledby="headingSpoiler2">
+<div id="collapseSpoiler2" class="accordion-collapse collapse" aria-labelledby="headingSpoiler2" data-bs-parent="#accordionSpoiler2">
 <div class="accordion-body">
 <p>Launch the Anaconda Prompt program and type <code>jupyter lab</code>.
 (Running this command on the standard Command Prompt will return an
@@ -511,7 +511,7 @@ <h3 class="accordion-header" id="headingSpoiler3">
   Running Cells in a Notebook
   </h3>
 </button>
-<div id="collapseSpoiler3" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler3" aria-labelledby="headingSpoiler3">
+<div id="collapseSpoiler3" class="accordion-collapse collapse" aria-labelledby="headingSpoiler3" data-bs-parent="#accordionSpoiler3">
 <div class="accordion-body">
 <p><img src="fig/jupyter_overview.png" alt="Overview of the Jupyter Notebook graphical user interface" class="figure"> To
 run Python code in a Jupyter notebook cell, click on a cell in the
@@ -557,7 +557,7 @@ <h3 class="accordion-header" id="headingSpoiler3">
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -579,8 +579,8 @@ <h3 class="accordion-header" id="headingSpoiler3">
   "url": "https://datacarpentry.github.io/image-processing/index.html",
   "identifier": "https://datacarpentry.github.io/image-processing/index.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor-notes.html b/instructor-notes.html
index 20b09aab0..ff748310f 100644
--- a/instructor-notes.html
+++ b/instructor-notes.html
@@ -567,7 +567,7 @@ <h3 id="q-can-you-blur-while-retaining-edges">Q: Can you blur while retaining ed
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
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-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 </div> <!-- / div.container -->
@@ -590,8 +590,8 @@ <h3 id="q-can-you-blur-while-retaining-edges">Q: Can you blur while retaining ed
   "url": "https://datacarpentry.github.io/image-processing/instructor-notes.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor-notes.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/01-introduction.html b/instructor/01-introduction.html
index 451c4451d..4fcd59c36 100644
--- a/instructor/01-introduction.html
+++ b/instructor/01-introduction.html
@@ -513,7 +513,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -536,7 +536,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/01-introduction.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/02-image-basics.html b/instructor/02-image-basics.html
index d88c8456e..54e95f01c 100644
--- a/instructor/02-image-basics.html
+++ b/instructor/02-image-basics.html
@@ -581,7 +581,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Further explanation </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>In the example above, form 1 loads the entire scikit-image library
 into the program as an object. Individual modules of the library are
@@ -752,7 +752,7 @@ <h3 class="callout-title">Changing Pixel Values (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>There are many possible solutions, but one method would be . . .</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -979,7 +979,7 @@ <h3 class="callout-title">Thinking about RGB colours (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>(255, 0, 0) represents red, because the red channel is maximised,
 while the other two channels have the minimum values.</li>
@@ -1023,7 +1023,7 @@ <h3 class="callout-title">RGB colour table (optional, not included in timing)</h
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>There are 24 total bits in an RGB colour of this type, and each bit
 can be on or off, and so there are 2<sup>24</sup> = 16,777,216 possible
@@ -1165,7 +1165,7 @@ <h3 class="callout-title">BMP image size (optional, not included in timing)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In such an image, there are 5,000 × 5,000 = 25,000,000 pixels, and 24
 bits for each pixel, leading to 25,000,000 × 24 = 600,000,000 bits, or
@@ -1265,7 +1265,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>The BMP file, <code>ws.bmp</code>, is 75,000,054 bytes, which matches
 our prediction very nicely. The JPEG file, <code>ws.jpg</code>, is
@@ -1309,7 +1309,7 @@ <h3 class="callout-title">Comparing lossless versus lossy compression (optional,
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>Here is a partial directory listing, showing the sizes of the
 relevant files there:</p>
@@ -1536,7 +1536,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1559,7 +1559,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/02-image-basics.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-18",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/03-skimage-images.html b/instructor/03-skimage-images.html
index 6a31bf810..c15b2ee1f 100644
--- a/instructor/03-skimage-images.html
+++ b/instructor/03-skimage-images.html
@@ -1043,7 +1043,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1066,7 +1066,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/03-skimage-images.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-07",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/04-drawing.html b/instructor/04-drawing.html
index 93193ae78..c8b28b978 100644
--- a/instructor/04-drawing.html
+++ b/instructor/04-drawing.html
@@ -1001,7 +1001,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
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 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1024,7 +1024,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/04-drawing.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-07",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/05-creating-histograms.html b/instructor/05-creating-histograms.html
index 0c43cc563..e90c82b08 100644
--- a/instructor/05-creating-histograms.html
+++ b/instructor/05-creating-histograms.html
@@ -550,7 +550,7 @@ <h3 class="callout-title">Using a mask for a histogram (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -746,7 +746,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -850,7 +850,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -873,7 +873,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/05-creating-histograms.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-14",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/06-blurring.html b/instructor/06-blurring.html
index dd3812d8a..7c4b21b97 100644
--- a/instructor/06-blurring.html
+++ b/instructor/06-blurring.html
@@ -525,7 +525,7 @@ <h3 class="callout-title">Kernels</h3>
 <button class="accordion-button instructor-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseInstructor1" aria-expanded="false" aria-controls="collapseInstructor1">
   <h3 class="accordion-header" id="headingInstructor1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div> Terminology about image boundaries </h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Take care to avoid mixing up the term “edge” to describe the edges of
 objects <em>within</em> an image and the outer boundaries of the images
@@ -792,7 +792,7 @@ <h3 class="callout-title">Experimenting with sigma values (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Generally speaking, the larger the sigma value, the more blurry the
 result. A larger sigma will tend to get rid of more noise in the image,
@@ -823,7 +823,7 @@ <h3 class="callout-title">Experimenting with kernel shape (10 min - optional, no
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb13">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -911,7 +911,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -934,7 +934,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/06-blurring.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-06-18",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/07-thresholding.html b/instructor/07-thresholding.html
index 1a3f89a01..a26506eb0 100644
--- a/instructor/07-thresholding.html
+++ b/instructor/07-thresholding.html
@@ -580,7 +580,7 @@ <h3 class="callout-title">More practice with simple thresholding (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The histogram for the <code>data/shapes-02.jpg</code> image can be
 shown with</p>
@@ -631,7 +631,7 @@ <h3 class="callout-title">More practice with simple thresholding (15
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here are the commands to create and view the binary mask</p>
 <div class="codewrapper sourceCode" id="cb8">
@@ -726,7 +726,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button instructor-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseInstructor1" aria-expanded="false" aria-controls="collapseInstructor1">
   <h3 class="accordion-header" id="headingInstructor1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div> Instructor Note </h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>The histogram of the maize root image may prompt questions from
 learners about the interpretation of the peaks and the broader region
@@ -929,7 +929,7 @@ <h3 class="callout-title">Ignoring more of the images – brainstorming (10 min)
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>One approach we might take is to try to completely mask out a region
 from each image, particularly, the area containing the white circle and
@@ -986,7 +986,7 @@ <h3 class="callout-title">Ignoring more of the images – implementation (30 min
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>We can apply a simple binary thresholding with a threshold
 <code>t=0.95</code> to remove the label and circle from the image. We
@@ -1042,7 +1042,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> What is &amp; doing in the example above? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
 <div class="accordion-body">
 <p>The <code>&amp;</code> operator above means that we have defined a
 logical AND statement. This combines the two tests of pixel intensities
@@ -1101,7 +1101,7 @@ <h3 class="callout-title">Thresholding a bacteria colony image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>Here is the code to create the grayscale histogram:</p>
 <div class="codewrapper sourceCode" id="cb23">
@@ -1197,7 +1197,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1220,7 +1220,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/07-thresholding.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/08-connected-components.html b/instructor/08-connected-components.html
index 7db66d0f0..2a533771a 100644
--- a/instructor/08-connected-components.html
+++ b/instructor/08-connected-components.html
@@ -528,7 +528,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <ol start="2" style="list-style-type: lower-alpha"><li>5</li>
 </ol></div>
@@ -556,7 +556,7 @@ <h3 class="callout-title">Object counting (optional, not included in
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: lower-alpha"><li>2</li>
 </ol></div>
@@ -694,7 +694,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Do you see an empty image? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>If you are using an older version of Matplotlib you might get a
 warning
@@ -797,7 +797,7 @@ <h3 class="callout-title">How many objects are in that image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>As you might have guessed, the return value <code>count</code>
 already contains the number of objects found in the image. So it can
@@ -908,7 +908,7 @@ <h3 class="callout-title">Plot a histogram of the object area distribution (10 m
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>The histogram can be plotted with</p>
 <div class="codewrapper sourceCode" id="cb22">
@@ -961,7 +961,7 @@ <h3 class="callout-title">Filter objects by area (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>One way to count only objects above a certain area is to first create
 a list of those objects, and then take the length of that list as the
@@ -1049,7 +1049,7 @@ <h3 class="callout-title">Remove small objects (20 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>To remove the small objects from the labeled image, we change the
 value of all pixels that belong to the small objects to the background
@@ -1153,7 +1153,7 @@ <h3 class="callout-title">Colour objects by area (optional, not included in timi
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution7" aria-expanded="false" aria-controls="collapseSolution7">
   <h4 class="accordion-header" id="headingSolution7"> Show me the solution </h4>
 </button>
-<div id="collapseSolution7" class="accordion-collapse collapse" data-bs-parent="#accordionSolution7" aria-labelledby="headingSolution7">
+<div id="collapseSolution7" class="accordion-collapse collapse" aria-labelledby="headingSolution7" data-bs-parent="#accordionSolution7">
 <div class="accordion-body">
 <p>We already know how to get the areas of the objects from the
 <code>regionprops</code>. We just need to insert a zero area value for
@@ -1261,7 +1261,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -1284,7 +1284,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/08-connected-components.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/09-challenges.html b/instructor/09-challenges.html
index 741c64cf5..c7923b343 100644
--- a/instructor/09-challenges.html
+++ b/instructor/09-challenges.html
@@ -413,7 +413,7 @@ <h3 class="callout-title">Morphometrics for bacterial colonies</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>First, let’s work through the process for one image:</p>
 <div class="codewrapper sourceCode" id="cb1">
@@ -555,7 +555,7 @@ <h3 class="callout-title">Colony counting with minimum size and automated thresh
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here is a modified function with the requested features. Note when
 calculating the Otsu threshold we don’t include the very bright pixels
@@ -641,7 +641,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -664,7 +664,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/09-challenges.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2024-03-12",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/404.html b/instructor/404.html
index 1fb9c38a5..5bdf3638a 100644
--- a/instructor/404.html
+++ b/instructor/404.html
@@ -379,7 +379,7 @@ <h1>Page not found</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -401,8 +401,8 @@ <h1>Page not found</h1>
   "url": "https://datacarpentry.github.io/image-processing/instructor/404.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/404.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/CODE_OF_CONDUCT.html b/instructor/CODE_OF_CONDUCT.html
index e88a1fd8e..eb4daeb40 100644
--- a/instructor/CODE_OF_CONDUCT.html
+++ b/instructor/CODE_OF_CONDUCT.html
@@ -391,7 +391,7 @@ <h1>Contributor Code of Conduct</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -414,7 +414,7 @@ <h1>Contributor Code of Conduct</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/CODE_OF_CONDUCT.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-25",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/LICENSE.html b/instructor/LICENSE.html
index d23572537..5d1cde60a 100644
--- a/instructor/LICENSE.html
+++ b/instructor/LICENSE.html
@@ -439,7 +439,7 @@ <h1>Licenses</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -462,7 +462,7 @@ <h1>Licenses</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/LICENSE.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-25",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/aio.html b/instructor/aio.html
index 79633f59f..0db8a66b1 100644
--- a/instructor/aio.html
+++ b/instructor/aio.html
@@ -775,7 +775,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Further explanation </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>In the example above, form 1 loads the entire scikit-image library
 into the program as an object. Individual modules of the library are
@@ -946,7 +946,7 @@ <h3 class="callout-title">Changing Pixel Values (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <p>There are many possible solutions, but one method would be . . .</p>
 <div class="codewrapper sourceCode" id="cb12">
@@ -1182,7 +1182,7 @@ <h3 class="callout-title">Thinking about RGB colours (5 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>(255, 0, 0) represents red, because the red channel is maximised,
@@ -1228,7 +1228,7 @@ <h3 class="callout-title">RGB colour table (optional, not included in timing)</h
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>There are 24 total bits in an RGB colour of this type, and each bit
 can be on or off, and so there are 2<sup>24</sup> = 16,777,216 possible
@@ -1401,7 +1401,7 @@ <h3 class="callout-title">BMP image size (optional, not included in timing)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>In such an image, there are 5,000 × 5,000 = 25,000,000 pixels, and 24
 bits for each pixel, leading to 25,000,000 × 24 = 600,000,000 bits, or
@@ -1505,7 +1505,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>The BMP file, <code>ws.bmp</code>, is 75,000,054 bytes, which matches
 our prediction very nicely. The JPEG file, <code>ws.jpg</code>, is
@@ -1549,7 +1549,7 @@ <h3 class="callout-title">Comparing lossless versus lossy compression (optional,
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>Here is a partial directory listing, showing the sizes of the
 relevant files there:</p>
@@ -3280,7 +3280,7 @@ <h3 class="callout-title">Using a mask for a histogram (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb5">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3480,7 +3480,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb11">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -3731,7 +3731,7 @@ <h3 class="callout-title">Kernels</h3>
 <button class="accordion-button instructor-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseInstructor1" aria-expanded="false" aria-controls="collapseInstructor1">
   <h3 class="accordion-header" id="headingInstructor1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div> Terminology about image boundaries </h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>Take care to avoid mixing up the term “edge” to describe the edges of
 objects <em>within</em> an image and the outer boundaries of the images
@@ -4000,7 +4000,7 @@ <h3 class="callout-title">Experimenting with sigma values (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>Generally speaking, the larger the sigma value, the more blurry the
 result. A larger sigma will tend to get rid of more noise in the image,
@@ -4031,7 +4031,7 @@ <h3 class="callout-title">Experimenting with kernel shape (10 min - optional, no
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <div class="codewrapper sourceCode" id="cb13">
 <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"></i><i aria-hidden="true" data-feather="chevron-right"></i>
@@ -4324,7 +4324,7 @@ <h3 class="callout-title">More practice with simple thresholding (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>The histogram for the <code>data/shapes-02.jpg</code> image can be
 shown with</p>
@@ -4375,7 +4375,7 @@ <h3 class="callout-title">More practice with simple thresholding (15
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here are the commands to create and view the binary mask</p>
 <div class="codewrapper sourceCode" id="cb8">
@@ -4473,7 +4473,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button instructor-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseInstructor1" aria-expanded="false" aria-controls="collapseInstructor1">
   <h3 class="accordion-header" id="headingInstructor1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div> Instructor Note </h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
 <div class="accordion-body">
 <p>The histogram of the maize root image may prompt questions from
 learners about the interpretation of the peaks and the broader region
@@ -4680,7 +4680,7 @@ <h3 class="callout-title">Ignoring more of the images – brainstorming (10 min)
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
 <div class="accordion-body">
 <p>One approach we might take is to try to completely mask out a region
 from each image, particularly, the area containing the white circle and
@@ -4739,7 +4739,7 @@ <h3 class="callout-title">Ignoring more of the images – implementation (30 min
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
 <div class="accordion-body">
 <p>We can apply a simple binary thresholding with a threshold
 <code>t=0.95</code> to remove the label and circle from the image. We
@@ -4795,7 +4795,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> What is &amp; doing in the example above? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
 <div class="accordion-body">
 <p>The <code>&amp;</code> operator above means that we have defined a
 logical AND statement. This combines the two tests of pixel intensities
@@ -4874,7 +4874,7 @@ <h3 class="callout-title">Thresholding a bacteria colony image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
 <div class="accordion-body">
 <p>Here is the code to create the grayscale histogram:</p>
 <div class="codewrapper sourceCode" id="cb23">
@@ -5123,7 +5123,7 @@ <h3 class="code-label">OUTPUT<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
 <div class="accordion-body">
 <ol start="2" style="list-style-type: lower-alpha">
 <li>5</li>
@@ -5155,7 +5155,7 @@ <h3 class="callout-title">Object counting (optional, not included in
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: lower-alpha">
 <li>2</li>
@@ -5297,7 +5297,7 @@ <h3 class="code-label">PYTHON<i aria-hidden="true" data-feather="chevron-left"><
 <button class="accordion-button spoiler-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSpoiler1" aria-expanded="false" aria-controls="collapseSpoiler1">
   <h3 class="accordion-header" id="headingSpoiler1">  <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="eye"></i></div> Do you see an empty image? </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>If you are using an older version of Matplotlib you might get a
 warning
@@ -5400,7 +5400,7 @@ <h3 class="callout-title">How many objects are in that image (15 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution3" aria-expanded="false" aria-controls="collapseSolution3">
   <h4 class="accordion-header" id="headingSolution3"> Show me the solution </h4>
 </button>
-<div id="collapseSolution3" class="accordion-collapse collapse" data-bs-parent="#accordionSolution3" aria-labelledby="headingSolution3">
+<div id="collapseSolution3" class="accordion-collapse collapse" aria-labelledby="headingSolution3" data-bs-parent="#accordionSolution3">
 <div class="accordion-body">
 <p>As you might have guessed, the return value <code>count</code>
 already contains the number of objects found in the image. So it can
@@ -5515,7 +5515,7 @@ <h3 class="callout-title">Plot a histogram of the object area distribution (10 m
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution4" aria-expanded="false" aria-controls="collapseSolution4">
   <h4 class="accordion-header" id="headingSolution4"> Show me the solution </h4>
 </button>
-<div id="collapseSolution4" class="accordion-collapse collapse" data-bs-parent="#accordionSolution4" aria-labelledby="headingSolution4">
+<div id="collapseSolution4" class="accordion-collapse collapse" aria-labelledby="headingSolution4" data-bs-parent="#accordionSolution4">
 <div class="accordion-body">
 <p>The histogram can be plotted with</p>
 <div class="codewrapper sourceCode" id="cb22">
@@ -5570,7 +5570,7 @@ <h3 class="callout-title">Filter objects by area (10 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution5" aria-expanded="false" aria-controls="collapseSolution5">
   <h4 class="accordion-header" id="headingSolution5"> Show me the solution </h4>
 </button>
-<div id="collapseSolution5" class="accordion-collapse collapse" data-bs-parent="#accordionSolution5" aria-labelledby="headingSolution5">
+<div id="collapseSolution5" class="accordion-collapse collapse" aria-labelledby="headingSolution5" data-bs-parent="#accordionSolution5">
 <div class="accordion-body">
 <p>One way to count only objects above a certain area is to first create
 a list of those objects, and then take the length of that list as the
@@ -5660,7 +5660,7 @@ <h3 class="callout-title">Remove small objects (20 min)</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution6" aria-expanded="false" aria-controls="collapseSolution6">
   <h4 class="accordion-header" id="headingSolution6"> Show me the solution </h4>
 </button>
-<div id="collapseSolution6" class="accordion-collapse collapse" data-bs-parent="#accordionSolution6" aria-labelledby="headingSolution6">
+<div id="collapseSolution6" class="accordion-collapse collapse" aria-labelledby="headingSolution6" data-bs-parent="#accordionSolution6">
 <div class="accordion-body">
 <p>To remove the small objects from the labeled image, we change the
 value of all pixels that belong to the small objects to the background
@@ -5764,7 +5764,7 @@ <h3 class="callout-title">Colour objects by area (optional, not included in timi
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution7" aria-expanded="false" aria-controls="collapseSolution7">
   <h4 class="accordion-header" id="headingSolution7"> Show me the solution </h4>
 </button>
-<div id="collapseSolution7" class="accordion-collapse collapse" data-bs-parent="#accordionSolution7" aria-labelledby="headingSolution7">
+<div id="collapseSolution7" class="accordion-collapse collapse" aria-labelledby="headingSolution7" data-bs-parent="#accordionSolution7">
 <div class="accordion-body">
 <p>We already know how to get the areas of the objects from the
 <code>regionprops</code>. We just need to insert a zero area value for
@@ -5909,7 +5909,7 @@ <h3 class="callout-title">Morphometrics for bacterial colonies</h3>
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution1" aria-expanded="false" aria-controls="collapseSolution1">
   <h4 class="accordion-header" id="headingSolution1"> Show me the solution </h4>
 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <p>First, let’s work through the process for one image:</p>
 <div class="codewrapper sourceCode" id="cb1">
@@ -6051,7 +6051,7 @@ <h3 class="callout-title">Colony counting with minimum size and automated thresh
 <button class="accordion-button solution-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSolution2" aria-expanded="false" aria-controls="collapseSolution2">
   <h4 class="accordion-header" id="headingSolution2"> Show me the solution </h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <p>Here is a modified function with the requested features. Note when
 calculating the Otsu threshold we don’t include the very bright pixels
@@ -6128,7 +6128,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -6151,8 +6151,8 @@ <h3 class="callout-title">Key Points</h3>
   "url": "https://datacarpentry.github.io/image-processing/instructor/aio.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/aio.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/discuss.html b/instructor/discuss.html
index 9571eff09..84598ebf7 100644
--- a/instructor/discuss.html
+++ b/instructor/discuss.html
@@ -411,7 +411,7 @@ <h1>Discussion</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -434,7 +434,7 @@ <h1>Discussion</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/discuss.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/edge-detection.html b/instructor/edge-detection.html
index 8b41e97a7..b7de9dfed 100644
--- a/instructor/edge-detection.html
+++ b/instructor/edge-detection.html
@@ -827,7 +827,7 @@ <h3 class="callout-title">Key Points</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -850,7 +850,7 @@ <h3 class="callout-title">Key Points</h3>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/edge-detection.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-08-16",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/images.html b/instructor/images.html
index 95fe5652d..2e149ecf5 100644
--- a/instructor/images.html
+++ b/instructor/images.html
@@ -753,7 +753,7 @@ <h3 id="09-challenges-figure-10">Figure 10</h3>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -776,8 +776,8 @@ <h3 id="09-challenges-figure-10">Figure 10</h3>
   "url": "https://datacarpentry.github.io/image-processing/instructor/images.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/images.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/index.html b/instructor/index.html
index 03b76d0b0..9fb719bd4 100644
--- a/instructor/index.html
+++ b/instructor/index.html
@@ -538,7 +538,7 @@ <h3 class="accordion-header" id="headingSpoiler1">
   Instructions for Linux &amp; Mac
   </h3>
 </button>
-<div id="collapseSpoiler1" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler1" aria-labelledby="headingSpoiler1">
+<div id="collapseSpoiler1" class="accordion-collapse collapse" aria-labelledby="headingSpoiler1" data-bs-parent="#accordionSpoiler1">
 <div class="accordion-body">
 <p>Open a terminal and type <code>jupyter lab</code>.</p>
 </div>
@@ -553,7 +553,7 @@ <h3 class="accordion-header" id="headingSpoiler2">
   Instructions for Windows
   </h3>
 </button>
-<div id="collapseSpoiler2" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler2" aria-labelledby="headingSpoiler2">
+<div id="collapseSpoiler2" class="accordion-collapse collapse" aria-labelledby="headingSpoiler2" data-bs-parent="#accordionSpoiler2">
 <div class="accordion-body">
 <p>Launch the Anaconda Prompt program and type <code>jupyter lab</code>.
 (Running this command on the standard Command Prompt will return an
@@ -602,7 +602,7 @@ <h3 class="accordion-header" id="headingSpoiler3">
   Running Cells in a Notebook
   </h3>
 </button>
-<div id="collapseSpoiler3" class="accordion-collapse collapse" data-bs-parent="#accordionSpoiler3" aria-labelledby="headingSpoiler3">
+<div id="collapseSpoiler3" class="accordion-collapse collapse" aria-labelledby="headingSpoiler3" data-bs-parent="#accordionSpoiler3">
 <div class="accordion-body">
 <p><img src="../fig/jupyter_overview.png" alt="Overview of the Jupyter Notebook graphical user interface" class="figure"> To
 run Python code in a Jupyter notebook cell, click on a cell in the
@@ -648,7 +648,7 @@ <h3 class="accordion-header" id="headingSpoiler3">
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -670,8 +670,8 @@ <h3 class="accordion-header" id="headingSpoiler3">
   "url": "https://datacarpentry.github.io/image-processing/instructor/index.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/index.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/instructor-notes.html b/instructor/instructor-notes.html
index e77ddb4b5..b68c3d71c 100644
--- a/instructor/instructor-notes.html
+++ b/instructor/instructor-notes.html
@@ -602,7 +602,7 @@ <h3 id="07-thresholding-headingInstructor1">
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -625,8 +625,8 @@ <h3 id="07-thresholding-headingInstructor1">
   "url": "https://datacarpentry.github.io/image-processing/instructor/instructor-notes.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/instructor-notes.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/key-points.html b/instructor/key-points.html
index ea20197e4..7603aaebc 100644
--- a/instructor/key-points.html
+++ b/instructor/key-points.html
@@ -550,7 +550,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -573,8 +573,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "url": "https://datacarpentry.github.io/image-processing/instructor/key-points.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/key-points.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/prereqs.html b/instructor/prereqs.html
index f31516c5d..56312109a 100644
--- a/instructor/prereqs.html
+++ b/instructor/prereqs.html
@@ -447,7 +447,7 @@ <h3 id="python-skills">Python skills<a class="anchor" aria-label="anchor" href="
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -470,7 +470,7 @@ <h3 id="python-skills">Python skills<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/prereqs.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/profiles.html b/instructor/profiles.html
index c41e76003..742dc748c 100644
--- a/instructor/profiles.html
+++ b/instructor/profiles.html
@@ -341,7 +341,7 @@ <h1>Learner Profiles</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -363,8 +363,8 @@ <h1>Learner Profiles</h1>
   "url": "https://datacarpentry.github.io/image-processing/instructor/profiles.html",
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/profiles.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/instructor/reference.html b/instructor/reference.html
index 1e00edffc..1d8497c80 100644
--- a/instructor/reference.html
+++ b/instructor/reference.html
@@ -559,7 +559,7 @@ <h1>Reference</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -582,7 +582,7 @@ <h1>Reference</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/instructor/reference.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/key-points.html b/key-points.html
index a9cae6001..108ebfa3b 100644
--- a/key-points.html
+++ b/key-points.html
@@ -548,7 +548,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer>
 </div> <!-- / div.container -->
@@ -571,8 +571,8 @@ <h2 class="accordion-header" id="flush-headingTwelve">
   "url": "https://datacarpentry.github.io/image-processing/key-points.html",
   "identifier": "https://datacarpentry.github.io/image-processing/key-points.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/pkgdown.yml b/pkgdown.yml
index 1d5a33a62..4c370da69 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,4 +2,4 @@ pandoc: 3.1.11
 pkgdown: 2.1.1
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-10-15T00:07Z
+last_built: 2024-10-22T00:07Z
diff --git a/prereqs.html b/prereqs.html
index c0efa3cba..9988c0581 100644
--- a/prereqs.html
+++ b/prereqs.html
@@ -445,7 +445,7 @@ <h3 id="python-skills">Python skills<a class="anchor" aria-label="anchor" href="
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -468,7 +468,7 @@ <h3 id="python-skills">Python skills<a class="anchor" aria-label="anchor" href="
   "identifier": "https://datacarpentry.github.io/image-processing/prereqs.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-07-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/profiles.html b/profiles.html
index 0aa472d0f..d110b52f3 100644
--- a/profiles.html
+++ b/profiles.html
@@ -341,7 +341,7 @@ <h1>Learner Profiles</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -363,8 +363,8 @@ <h1>Learner Profiles</h1>
   "url": "https://datacarpentry.github.io/image-processing/profiles.html",
   "identifier": "https://datacarpentry.github.io/image-processing/profiles.html",
   "dateCreated": "2017-03-14",
-  "dateModified": "2024-10-15",
-  "datePublished": "2024-10-15"
+  "dateModified": "2024-10-22",
+  "datePublished": "2024-10-22"
 }
 
   </script><script>
diff --git a/reference.html b/reference.html
index 0bddefe70..41f1493ac 100644
--- a/reference.html
+++ b/reference.html
@@ -557,7 +557,7 @@ <h1>Reference</h1>
         <p>Materials licensed under <a href="LICENSE.html">CC-BY 4.0</a> by the authors</p>
 
         <p>Template licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/" class="external-link">CC-BY 4.0</a> by <a href="https://carpentries.org/" class="external-link">The Carpentries</a></p>
-        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.8" class="external-link">sandpaper (0.16.8)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
+        <p>Built with <a href="https://github.com/carpentries/sandpaper/tree/0.16.9" class="external-link">sandpaper (0.16.9)</a>, <a href="https://github.com/carpentries/pegboard/tree/0.7.6" class="external-link">pegboard (0.7.6)</a>, and <a href="https://github.com/carpentries/varnish/tree/1.0.4" class="external-link">varnish (1.0.4)</a></p>
 			</div>
 		</footer></div> <!-- / div.container -->
 	<div id="to-top">
@@ -580,7 +580,7 @@ <h1>Reference</h1>
   "identifier": "https://datacarpentry.github.io/image-processing/reference.html",
   "dateCreated": "2017-03-14",
   "dateModified": "2023-04-26",
-  "datePublished": "2024-10-15"
+  "datePublished": "2024-10-22"
 }
 
   </script><script>