Method for block-based digital image watermarking
US7006663B2 · kind B2 · utility
6Cited by
6References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 16, 2003 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | May 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of encoding a watermark into a digital image. The method includes partitioning an original image into blocks and then determining a variance value of each block. The blocks are then arranged according to the variance values. A number of selected blocks are identified, where the number depends upon the size of the watermark. The blocks selected are then arranged by their location. Data from the watermark is used to replace bits in a representation of each of the selected blocks with data from the watermark. A method of decoding is also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.