Content aware image resizing

Two Israeli scientists, Dr. Ariel Shamir and Dr. Shai Avidan, gave a presentation at SIGGRAPH the other day that demonstrates an inteligent way to resize images. Rather than just a dumb resampling at the new resolution based on the average of the pixels at the old, or a method based on finding edges, these guys have come up with a technique that analyses the content, generates 3D shapes from it, and resizes it, preserving the proportions of the important elements.