Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Geoffrey B. Rhoads0
Date of Patent
February 21, 2006
0Patent Application Number
104059510
Date Filed
April 1, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
Methods for embedding and reading auxiliary messages from image signals use embedded code signals modulated with the auxiliary message. These embedded ode signals may be used to convey hidden tracking codes in images, video and printed objects. The embedded code signals are embedded by varying characteristics of the image signal, including, for example, gray-level, reflective properties, photo-reactive properties, etc.
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