Watermark inside image

Question

How to add a watermark inside some image included with \includegraphics (or other ways, if \includegraphics doesn’t allow it)? I don’t talk about a document wide watermarks, or watermarks witch take the wool page, but just put a little image in the top right corner of some images.

As example, with the following MWE:

\documentclass[a4paper,12pt]{article}

\usepackage[english]{babel}
\usepackage{graphicx}

\begin{document}

\begin{figure}
  \centering
  \includegraphics[width=0.5\textwidth]{example-image-a}
  \caption{Main image}
\end{figure}
\end{document}

I try to put example-image-b in 1cm×1cm size in the top right corner.

Is it possible with \includegraphics or should I change the way to do it?

Answer 1

You can always print something over something else. The main problem is to get to the right top corner. One way is e.g.

\documentclass[a4paper,12pt]{article}

    \usepackage[english]{babel}
    \usepackage{graphicx}

    \begin{document}

    \begin{figure}
      \centering
      \raisebox{-\height}{\includegraphics[width=0.5\textwidth]{example-image-a}}%
      \hspace{-1cm}%
      \raisebox{-\height}{\includegraphics[width=1cm]{example-image-b}}
      \caption{Main image}
    \end{figure}
    \end{document}