Pixel-based digital watermarks located near edges of an image
US6580804B1 · kind B1 · utility
42Cited by
5References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0061
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Predetermined information as a digital watermark is encoded near or substantially on edges of digital images. The application of this technique is particularly suited for binary images such as text since the embedded digital watermark does not significantly affect the appearance of the text. The embedded digital watermark is decoded to confirm the origin of the digital image even if only a portion of the original digital image is copied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.