   <span class="n">image</span> <span class="o">=</span> <span class="n">image</span><span class="o">.</span><span class="n">astype</span><span class="p">(</span><span class="n">np</span><span class="o">.</span><span class="n">uint8</span><span class="p">)</span>
    <span class="n">x0</span><span class="p">,</span> <span class="n">y0</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">pos</span><span class="p">[</span><span class="mi">0</span><span class="p">]