System and method for the generation of multiple angle correlation-based digital watermarks
US7894626B2 · kind B2 · utility
38Cited by
6References
19Claims
0Family size
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Key dates
| Filing date | Aug 31, 2007 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Dec 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are systems and methods directed to the generation of digitally watermarked grayscale images having a watermark embedded at different arbitrary Rotation Angles. A single public key can be used to retrieve the otherwise invisible watermarks from the watermarked images when overlaid atop the images at Orientation Angles corresponding to the Rotation Angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.