Edge enhancement correction for improved image quality
US6363526B1 · kind B1 · utility
13Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1998 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Apr 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An objectionable outlining effect, seen as dark edges and white edges outlining everything in a scene, is eliminated by clipping or limiting the spikes generated by excessive enhancement. Specifically, a method is used for improving the quality of an enhanced video image, while simultaneously maintaining or improving image sharpness, by clipping the RGB levels of the enhanced video image, at the points of enhancement, to upper and lower level bounds representing the signal levels of the video signal prior to its enhancement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.