% pandoc -fmarkdown-implicit_figures
![image](lalune.jpg){height=2em}
^D
<p><img src="lalune.jpg" alt="image" style="height:2em" /></p>

% pandoc -fmarkdown-implicit_figures -t latex
![image](lalune.jpg){height=2em}
^D
\includegraphics[width=\textwidth,height=2em]{lalune.jpg}