Method for extracting multiresolution watermark images to determine rightful ownership
US6373974B2 · kind B2 · utility
68Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1998 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Sep 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for embedding and extracting visually imperceptible indicia in an image includes embedding a visually imperceptible indicia in an original image; testing a test image for an embedded visually imperceptible indica; and extracting the visually imperceptible indicia from the test image to determine if the test image is a copy of the original image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.