[Tex/LaTex] Multiple captions under a single figure

Question

I have a figure (lets say a picture of a couple ) for which I want two subcaptions (1 a that will be under the first half of the figure and will show the man and 1 b that will be under the second half of the picture and will show the woman).

I underline that there is only one figure that I want to caption as if there were two.

Answer 1

One example using subfig:

\documentclass{article}
\usepackage{graphicx}
\usepackage[justification=centering]{subfig}
\usepackage[colorlinks]{hyperref}

\begin{document}
\begin{figure}[!h]
\centering
\hspace{-1cm}%
% png from http://es.wikipedia.org/wiki/Homo_sapiens#mediaviewer/File:Human.svg
\includegraphics[trim=.5cm 20cm 2.2cm 0cm, clip,height=7cm]{Human} 
\subfloat[\label{man} This is a man waving.]{\hspace{.5\linewidth}}
\subfloat[\label{woman} This is a woman.]{\hspace{.5\linewidth}}
\caption[Man a woman]{Human specimens.\label{humans}}
\end{figure}

As you can see in figure \ref{humans}, there are two types
of humans specimens: those that greet you (\ref{man}) 
and those that left the arms down (\ref{woman}).

\listoffigures

\end{document}

If you have some conflict between subfig and hyperref, as noted by egreg cooment, you can use also the newest subcaption package. This example should produce the same output that above:

\documentclass{article}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage[colorlinks]{hyperref}

\begin{document}
\begin{figure}[!h]

\centering
\hspace{-1cm}%
% png from http://es.wikipedia.org/wiki/Homo_sapiens#mediaviewer/File:Human.svg
\includegraphics[trim=.5cm 20cm 2.2cm 0cm, clip,height=7cm]{/home/fran/Human} 

\begin{minipage}[t]{.5\linewidth}
\centering
\subcaption{This is a man waving.}\label{man}
\end{minipage}%
\begin{minipage}[t]{.5\linewidth}
\centering
\subcaption{This is a woman}\label{woman}
\end{minipage}
\caption[Man a woman]{Human specimens.\label{humans}}

\end{figure}

As you can see in figure \ref{humans}, there are two types
of humans specimens: those that greet you (\ref{man}) 
and those that left the arms down (\ref{woman}).

\listoffigures

\end{document}

If you want figure 1 and 2 (instead of 1a and 1b), simply use \caption instead of \subcaption inside the minipages (of course, then you do not need the subcaptionpackage).