title: Google Images API URL Parameters
body: <p>I am using the Images API documented here:<a href="https://cloud.google.com/appengine/docs/python/images/" rel="nofollow">https://cloud.google.com/appengine/docs/python/images/</a></p>
  
  <p>According to the documents:</p>
  
  <blockquote>
    <p>You can then add arguments to this URL to get the desired size and
    crop parameters. The available arguments are:</p>
    
    <p>=sxx where xx is an integer from 0–1600 representing the length, in pixels, of the image's longest side. For example, adding =s32 resizes
    the image so its longest dimension is 32 pixels.
    =sxx-c where xx is an integer from 0–1600 representing the cropped image size in pixels, and -c tells the system to crop the image.</p>
  </blockquote>
  
  <p>It seems there are quite a few additional arguments available. For example, flipping an image with <code>-fv</code> or <code>-fh</code>, adding a 20px border with <code>-b20</code> and several more. I can't find these mentioned anywhere. Is this just an as-of-yet unpublished API, or is there a good reference out there that I've just been unable to find?</p>