en images and channels</li>
  <li>translate, flip, mirror, rotate, scale, shear and generally distort images</li>
  <li>merge or composite multiple images together</li>
  <li>convolve or merge neighboring pixels together</li>
  <li>generate image metrics or 'fingerprints'</li>
</ul>

<p>The operator loops through all the pixels of an image and all the channels of each pixel and returns a new image with the results.  The expression can reference any image in the image sequence, but only a copy of the first i