\begin{overpic}[width=0.49\textwidth]{ys_vein_CBK1a_21_BSE}
\put(1,74){\colorbox{white}{(\sublabel{ys_vein_CBK1a_21_BSE}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20170626182435-358258}{ys_vein_CBK1a_21_BSE}}}
%%(\subref{ys_vein_CBK1a_21_BSE}) \href{ys_vein_CBK1a_21_BSE}
\color{red}
\put(50.1,43.8){\footnotesize \circle{0.7} \href{http://dream.misasa.okayama-u.ac.jp/?q=20170626182429-026536}{spot of ys_vein_CBK1a@21}} % 20170626182429-026536 % \vs(3775.0, -2481.9)
%%scale 10 micro meter
\put(1,1){\line(1,0){13.0}}
\end{overpic}