CyberCode

CyberCode is a 2D bar code symbology developed for use in tagging objects to be recognized by augmented-reality systems which add additional images to a user's view of the object. They are optimized for being read quickly by inexpensive cameras looking at the object from odd angles, and designed to be read and interpreted simultaneously with the software figuring out the position and orientation of the object.

Links

 * Wikipedia article
 * Sony page about the technology
 * Developer's page
 * Matrix: A Realtime Object Identification and Registration Method for Augmented Reality
 * CyberCode: Designing augmented reality