SYSTEMS AND METHODS OF INTERACTION IWTH INVISIBLE PRINTING

摘要

Systems and methods of interaction with invisible printing. In one embodiment, a printed page includes a printable surface, an invisible machine readable code disposed on the printable surface; and a human viewable image disposed on the printable surface. The invisible machine readable code may not absorb or reflect visible light substantially differently from the printable surface, in one embodiment. The invisible machine readable code may be detectable when exposed to infrared and/or ultraviolet light.