Rounded corner colored box around figure

Question

I'm trying to get Rounded corner grey-colored box around figures. One solution would be to use

\usepackage{float}
\floatstyle{boxed} 
\restylefloat{figure}

but this results in black box around a figure. What would be the way to proceed?

Answer 1

You can define your own \floatstyle. In this case I took the definition from the float package and adjusted it to use the mdframed pacakge environment to draw the frame. Below, I took the liberty to add a background color, and tikzsetting to illustrate some of the customization that are possible -- see the mdframed documentation for more options.

Here is a comparrison of usine \floatstyle{boxed} and \floatstyle{myRoundBox}:

\documentclass{article}
\usepackage{graphicx}
\usepackage{float}
\usepackage[framemethod=tikz]{mdframed}

\mdfdefinestyle{myFigureBoxStyle}{backgroundcolor=yellow!10,, roundcorner=25pt,tikzsetting={draw=blue, line width=1pt}}%

\makeatletter
  \newcommand\fs@myRoundBox{\def\@fs@cfont{\bfseries}\let\@fs@capt\floatc@plain
  \def\@fs@pre{\begin{mdframed}[style=myFigureBoxStyle]}%
  \def\@fs@mid{}%
  \def\@fs@post{\end{mdframed}}\let\@fs@iftopcapt\iffalse}
\makeatother

\floatstyle{myRoundBox} 
\restylefloat{figure}

\begin{document}

\floatstyle{boxed} 
\restylefloat{figure}

\section{Using boxed}
\begin{figure}[h]
    \centering
    \includegraphics[width=0.35\textwidth]{images/eiffel_tower}
    \caption{Some caption}
\end{figure}

\floatstyle{myRoundBox} 
\restylefloat{figure}
\section{Using myRoundBox}
\begin{figure}[h]
    \centering
    \includegraphics[width=0.35\textwidth]{images/eiffel_tower}
    \caption{Some caption}
\end{figure}
\end{document}