Patent ID: 6903726
Filing Date: 2005-06-07
Classification: G06K

Abstract:
1. A document having visible information and encoded positional information, said document comprising: a) a document surface; b) visible information applied on the document surface, said visible information being visibly discernable by the naked human eye; c) a first pattern applied on the document surface coincident with the visible information applied on the document surface, said first pattern being transparent to the naked human eye while not disturbing the discernability by the naked human eye of the visible information applied on the document surface, said first pattern comprising a plurality of parallel code stripes having encoded therein positional information on the document surface relative a first coordinate axis; and d) a second pattern applied on the document surface coincident with the visible information applied on the document surface, said second pattern being transparent to the naked human eye while not disturbing the discernability by the naked human eye of the visible information applied on the document surface, said second pattern comprising a plurality of parallel code stripes having encoded therein positional information on the document surface relative a second coordinate axis, the second coordinate axis crossing the first coordinate axis such that the first and second patterns create a lattice.