Patent ID: 7249257
Filing Date: 2007-07-24
Classification: G06F,G06T,G09B,H04N,Y10S

Abstract:
1. An apparatus to read digital watermarks embedded within a map, the map being divided into a plurality of areas, with each area comprising at least one embedded digital watermark including location information for the respective map area, said apparatus comprising: a global positioning system receiver to determine a location of said apparatus; an input device to capture an image of at least a portion of the respective map area; memory including executable software instructions stored therein, the instructions to extract the location information from the at least one embedded digital watermark from the captured image of at least a portion of the respective map area, and to correlate the location of the apparatus with the extracted location information; electronic processing circuitry to execute the software instructions; and an output device to indicate the correlation of the apparatus location and the captured watermark location information.