More cool work with images from Siggraph :
This is ingenious. You know when you want to resize an image that you can either remove pixels ( cropping ) or average pixels ( scaling ). In this approach they very cleverly choose pixels for removal not by their location, but by how important they appear to be to the contrast of the image. It works really well for adding to an image too. It just gets more and more amazing as you watch. It's spooky at the end when they just remove people for scenes.