latex "captionof" footnote code example
Example: footnote in a caption latex
\usepackage{afterpage}
\afterpage{
\begin{figure}
\begin{center}
\includegraphics[scale=0.75]{images/the_cited.png}
\caption[The LOF caption]{Lorem ipsum. \tiny{Example\footnotemark}}
\label{fig:cited_img}
\end{center}
\end{figure}
\footnotetext{Source: \url{http://www.example.com/the_image.png}
}