Color adaptive watermarking
US6590996B1 · kind B1 · utility
504Cited by
160References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3284
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color mapping process enhances a watermark by computing a change in colors that is less visible for a given watermark strength. The mapping process provides smooth transitions from one color region to another, and may be implemented efficiently with a 3D look up table. A user interface scheme enables the user to control encoding of the watermark in desired color regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.