"Now, a site called Rsizr (pronounced "resizer") has added a feature that isn't even in the newest version of Photoshop: the ability to shrink or enlarge pictures--horizontally and vertically--with relatively little distortion. For instance, Rsizr can compress a photo of students in a classroom without sacrificing resolution by removing the pixels between desks. Likewise, Rsizr can expand the picture to fill, say, an entire computer screen by adding extra pixels in certain places.

The algorithm that Rsizr is based on was originally developed by Shai Avidan, senior research scientist at Adobe Systems, and Ariel Shamir, a visiting researcher at Mitsubishi Electric Research Laboratories, in Cambridge, MA."

MIT Technology Review