Computing distortion of media signals embedded data with repetitive structure and log-polar mapping
US7152021B2 · kind B2 · utility
42Cited by
23References
6Claims
0Family size
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Key dates
| Filing date | Aug 6, 2003 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Nov 27, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital watermark detection method uses a matched filtering technique on a log polar re-mapping of a watermarked signal to detect peaks associated with a repetitive structure of a watermark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.