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US 2002/0159615 A1Published application
Inferring object status based on detected watermark data
AssigneeDigimarc Corporation
InventorsGeoffrey B. Rhoads, Ammon E. Gustafson
Life of this patent
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Abstract
Image, video, or audio data is encoded with both a frail and a robust watermark. The two watermarks respond differently to different forms of processing (e.g., copying the object may render the frail watermark unreadable), permitting an original object to be distinguished from a processed object. Appropriate action can then taken in response thereto.
Claims8
A method comprising:
- attempting to detect first and second watermarks from an object;
- if the first and second watermarks are both detected, reaching a first conclusion concerning the object;
- and
- if the first watermark is detected but not the second, reaching a second, different, conclusion concerning the object.
1 more element
A method comprising:
- receiving a set of sampled data;
- analyzing said set of data for watermark information;
- and
- based on a result of said analysis, concluding that the sampled data does not correspond to an original.
1 more element
Dependencies are inferred from the claim text.