l frame and is
required here because the <code/><a href=../matlab/vl_mser.html>vl_mser</a></code> code assumes that the row index
is the first index, but the normal image convention assumes that this is the
<code/>x</code> (column) index.</p>

<p>Plotting the MSERs themselves is a bit more involved as they have
arbitrary shape.  To this end, we exploit two
functions: <code/><a href=../matlab/vl_erfill.html>vl_erfill</a></code>, which, given an image and a region
seed, returns a list of the pixels belonging 