Patent ID: 6556690
Filing Date: 2003-04-29
Classification: G06K

Abstract:
An object bearing an image visible to the eye, said object further comprising:an object surface bearing an image field in which the visible image is present, the object surface and image field thereon being non-planar and curved in at least one dimension; and an encodement in a symbology representing encoded information recorded in a material that is invisible to the eye and over a substantial portion of the visible image in the image field including curved encodement portions that are curved due to the curvature of the non-planar image field, the symbology of the encodement recorded within the image field adapted to be imaged as a planar symbology image upon a planar imager that is sensitive to the invisible material and is disposed in use generally at a predetermined distance from a central point of the two-dimensional visible image to capture the entirety of the encodement, wherein the symbology is modified to compensate for optical distortion of the symbology introduced by imaging the curved encodement portions as the planar symbology image to ensure that the symbology is accurately captured by the planar imager.