Watermarking different areas of digital images with different intensities
US8331613B2 · kind B2 · utility
2Cited by
4References
14Claims
0Family size
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Key dates
| Filing date | Oct 28, 2011 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Oct 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0061
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image is processed to encode a digital watermark, with different regions thereof processed using different levels of watermark intensity. In an image comprised of elements of differing sizes (e.g., halftone shapes of different sizes, or lines of different width), the different regions can be defined by reference to the sizes of elements contained therein. Regions characterized by relatively small elements can be watermarked at a relatively low intensity. Regions characterized by relatively large elements can be watermarked at a relatively high intensity. A variety of other features are also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.