Content Aware Image Resizing

From ER:

"At the SIGGRAPH 2007 conference in San Diego, two Israeli professors,
Shai Avidan and Ariel Shamir, have demonstrated a new method to shrink images.
The method is called 'Seam Carving for Content-Aware Image Resizing'
(PDF paper here) and it figures out which parts of an image are less significant.
 This makes it possible to change the aspect ratio of an image without making
the content look skewed or stretched out. There is a video demonstration up on YouTube."