title: Quantize using wand
body: <p>I want to retrieve a list of <code>n</code> average colors in an image using Python Wand. From the command line, this can be achieved using Imagemagick directly.</p>
  
  <pre><code>convert image.jpg -colors $n -format %c histogram:info:-
  </code></pre>
  
  <p>Wands <code>Image</code> objects have a histogram dictionary, from which the list of colors can be accessed. But I cannot find a command to quantize the colors.</p>
  
  <p>Can Wand perform color reduction? Is there a binding for <code>-colors</code>?</p>