\begin{overpic}[width=0.49\textwidth]{isei_logo}
\put(1,74){\colorbox{white}{(\sublabel{isei_logo}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20111219191738-332-039}{isei_logo}}}
%%(\subref{isei_logo}) \href{isei_logo}
\color{red}
\end{overpic}
<?xml version="1.0" encoding="UTF-8"?>
<acquisitions>
</acquisitions>