Method and apparatus for analog insertion of low frequency watermarks
US7756288B2 · kind B2 · utility
2Cited by
84References
53Claims
0Family size
Inventors
Key dates
| Filing date | May 28, 2004 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Mar 9, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0052
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for inserting a watermark onto an illuminated image sequence. A light modulator modulates a light source. A controller controls the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.