Watermarking different areas of digital images with different intensities
US8050450B2 · kind B2 · utility
5Cited by
45References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2010 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Apr 12, 2030 |
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.