an> <span class="o">=</span> <span class="n">cam</span><span class="o">.</span><span class="n">hue_angle</span><span class="p">(</span><span class="n">apr</span><span class="p">,</span><span class="n">br</span><span class="p">,</span> <span class="n">htype</span> <span class="o">=</span> <span class="s1">&#39;deg&#39;</span><span class="p">)</span>
    <span class="n">hpt</span><span class="p">[(</span><span class="n">apt</span><span class="o">==</span><span class="mi">0</span><span class="p">)</span><span 