titlepage.tex

\documentclass[paper=a4, DIV=100]{scrbook}
\usepackage{tikz}
\usepackage{setspace}
\usepackage{fontspec}
\setmainfont{Minion Pro}

\title{Unmasking the Gamma-Ray Sky}
\subtitle{Comprehensive and Reproducible Analysis for Cherenkov Telescopes}
\author{Kai Brügge}

\begin{document}
\begin{titlepage}
    \tikz[remember picture,overlay] \node[opacity=0.2,inner sep=15pt] at (current page.center){\includegraphics[width=0.94\paperwidth,height=0.94\paperheight]{figures/contours_lst.jpg}};%
    \tikz[remember picture,overlay] \node[inner sep=15pt, anchor=north east] at (current page.north east){\hspace{-15em}\includegraphics[width=0.4\paperwidth]{figures/tudo_logo.jpg}};%
    \vspace*{8cm}
    \makeatletter
    \begin{center}
    {\setstretch{1.3}
            
      \begin{Huge}
        \@title
      \end{Huge}\\[0.2cm]
      %
      \begin{Large}
        \@subtitle
      \end{Large}\\
      %
      \emph{by}\\
      \@author
      \par}

      \vspace{10cm}
    {\setstretch{1.1}  
      A document submitted in partial fulfillment
      of the requirements for the degree of\\
      \emph{Dr. rer. nat.}\\
      at\\
      \textsc{Technische Universität Dortmund}
      
      \vspace{3.cm}
      Supervised by \\
    Prof.\,Dr.\,Dr.\,Wolfgang Rhode\,  and\,   Prof.\,Dr.\,Kevin Kröninger

    \par}


    \end{center}
    
    \makeatother
  \end{titlepage}

\end{document}