US 6,574,350 · Granted 2003-06-03
Digital watermarking employing both frail and robust watermarks
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.
Patent details
- Publication number
- US 6,574,350
- Filing date
- 2000-02-03
- Grant date
- 2003-06-03
- Assignee
- Digimarc Corporation
- Inventor(s)
- RHOADS GEOFFREY B., GUSTAFSON AMMON E.
- CPC class
- G06Q30/02
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