"The CyberCode is a visual tagging system based on a 2Dbarcode technology and provides several features not provided by other tagging systems. CyberCode tags can be recognized by the low-cost CMOS or CCD cameras found in more and more mobile devices, and it can also be used to determine the 3D position of the tagged object as well as its ID number."

Selected documentation: citeseer.nj.nec.com/rekimoto00cybercode.html
PDF: www.csl.sony.co.jp/person/rekimoto/papers/dare2000.pdf