Apparatus and method for detecting embedded watermarks
US7263615B2 · kind B2 · utility
1Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2002 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Mar 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/32165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A detecting data processing apparatus configured to identify at least one of a plurality of code words present in a marked version of a material item. The detecting apparatus including a registration processor operable to compare the samples of the marked material item with a copy of the original material item samples. If a sample of the marked material item and the original material item differ by a comparison threshold, the registration processor replaces the compared sample of the marked material item with the corresponding sample from the original material item.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.