THREE DIMENSIONAL DATA STORAGE

摘要

An identification document is provided comprising a printable layer, a computer readable data storage element, and a computer readable calibration element (32). The computer readable data storage element is formed on the printable layer and comprises a plurality of pixels, wherein each pixel has one of a predetermined plurality of colors. The computer readable calibration element (30) is formed on the printable layer and comprises a plurality of pixels (40, 42a-42h) and includes information (44, 42b) enabling a determination of the pixel size in the computer readable data storage element and also a determination of at least a portion of the predetermined plurality of colors (41,46).