Image processor and image processing method
US6741758B2 · kind B2 · utility
27Cited by
19References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Nov 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A registration signal embedding method of embedding registration signals adaptively in accordance with image signals. The frequency property of image data is determined, and either a first registration signal or a second registration signal is selected in accordance with the frequency property, and is added to image data. The registration embedded in this way has the advantage of increased resistance and easy detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.