Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Geoffrey B. Rhoads0
Date of Patent
May 4, 2010
Patent Application Number
12001764
Date Filed
December 11, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
An image is marked by making slight changes to pixel values. These changes are essentially imperceptible on human scrutiny, but detectable by computer analysis. Such markings have applications in identifying ownership of images (including video), and also in device control (e.g., triggering a “do not copy” response in suitably configured hardware and software systems).
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