I need to insert many images inside an equation and to write something over these images. So i tried something like this:
\begin{equation}
\begin{overpic}[valign=c,scale=0.3]{image}
\put(50,50){$text$}
\end{overpic}
\end{equation}
but the image is not align with the equation. It seems the overpic environment doesn't recognize the option "valign=c". Which option should I use? Maybe the answer is obvious but I'm not so good at handling images with latex. Thank you!
