Detecting and protecting a copy guarded document
US7599081B2 · kind B2 · utility
1Cited by
2References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2005 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Jul 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00867
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A detection result indicating whether a document image is copy guarded is generated. Based on the detection result, information contained in the document image is concealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.