title: Get Image size WITHOUT loading image into memory
body: <p>I understand that you can get the image size using PIL in the following fashion</p>
  
  <pre><code>from PIL import Image
  im = Image.open(image_filename)
  width, height = im.size
  </code></pre>
  
  <p>However, I would like to get the image width and height <em>without</em> having to load the image in memory. Is that possible? I am only doing statistics on image sizes and dont care for the image contents. I just want to make my processing faster.</p>