e image to a format that is suitable for the
<code>vl_mser</code> command.</p>

<precode type='matlab'>
I = uint8(rgb2gray(I)) ;
</precode>

<p>We compute the region seeds and the elliptical frames by</p>

<precode type='matlab'>
[r,f] = vl_mser(I,'MinDiversity',0.7,...
                'MaxVariation',0.2,...
                'Delta',10) ;
</precode>

<p>We plot the region frames by</p>

<precode type='matlab'>
f = vl_ertr(f) ;
vl_plotframe(f) ;
</precode>

<p><code>vl_ertr</code> transposes the elliptical fr