\begin{overpic}[width=0.49\textwidth]{IMG_5008}
\put(1,74){\colorbox{white}{(\sublabel{IMG_5008}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20120106094615-087-864}{IMG_5008}}}
%%(\subref{IMG_5008}) \href{IMG_5008}
\color{red}
\end{overpic}
<?xml version="1.0" encoding="UTF-8"?>
<acquisitions>
</acquisitions>