Image marking to permit later identification
US6301369A · kind A · utility
17Cited by
70References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2001 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Jan 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/327
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital image is subtly changed to permit its subsequent identification, without essentially altering its human appearance. The changes affect only a minority of the image pixels. By checking for the presence of such changes in a suspect image, a suspect image can be matched with the original image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.