>vl_covdet</a></code> to compute
and visualize co-variant features. Fist, let us load an example image
and visualize it:</p>

<div style="clear:both;">
<div class="highlight"><pre><span class="n">im</span> <span class="p">=</span> <span class="n">vl_impattern</span><span class="p">(</span><span class="s">&#39;roofs1&#39;</span><span class="p">)</span> <span class="p">;</span>
<span class="n">figure</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="p">;</span> <span