title: Find Image components using python/PIL
body: <p>Is there a function in PIL/Pillow that for a grayscale image, will separate the image into sub images containing the components that make up the original image? For example, a png grayscale image with a set of blocks in them. Here, the images types always have high contrast to the background.</p>
  
  <p>I don't want to use openCV, I just need some general blob detection, and was hoping Pillow/PIL might have something that does that already.</p>