Watermarking with cone-forest detection regions
US6856693B2 · kind B2 · utility
69Cited by
3References
36Claims
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Key dates
| Filing date | Oct 9, 2001 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | Sep 4, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a watermarking system, an embedder embeds one of several alternative watermark patterns that represent the source message using side information to improve robustness. A detector uses normalized correlation to test all of the patterns, indicating that the source message is present if any one of the patterns is detected. The detection process results in a detection region that is the union of several disjoint cones, or a cone-forest, in media space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.