How to keep the bounding boxes when interval is NOT zero?

[lida2003]

Interval can speed up FPS data, but the bounding box is blinking also.

How to keep the box in every frame? Kind of tracking ability?

[SarperYurttas]

Have you added the nvtracker plugin to your pipeline? The NvDCF tracker is good at dealing with inference intervals of more than 0.

https://docs.nvidia.com/metropolis/deepstream/dev-guide/text/DS_plugin_gst-nvtracker.html#low-level-tracker-comparisons-and-tradeoffs

[lida2003]

@SarperYurttas I think I didn't try this yet.
So do you imply that the NvDCF tracker has implemented drawing those bbox if inference is NOT used?
I asked on nvidia forum also about this issue, no luck yet.
But I'll try your idea to see if NvDCF has implemented the functionality to draw bounding boxes for frames other than every nth inference frame.

• How to keep the bounding boxes when interval is NOT zero?

[SarperYurttas]

In the documentation, here it says:

NvDCF: The NvDCF tracker is an online multi-object tracker that employs a discriminative correlation filter for visual object tracking, which allows independent object tracking even when detection results are not available. It uses the combination of the correlation filter responses and bounding box proximity for data association.

So if your inference engine misses the detection(False negative) or it has an interval, the tracker looks for possible locations for tracked objects and generates a bounding box if its confidence is higher than the threshold that you specified in the config file. It's of course way more complicated than that so please read the documentation carefully to understand what is going on exactly.