Method and apparatus for adjusting the contrast of an input image
US8131104B2 · kind B2 · utility
2Cited by
24References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Dec 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for adjusting the contrast of an input image. A blurred image corresponding to the input image is obtained, the brightness level of at least some of the pixels in the input image being varied to provide the blurred image. A ring likelihood for pixels in the input image is obtained, the ring likelihood providing a measure of the likelihood that said pixels are non-edge pixels in the neighborhood of an edge pixel. The output image is produced as a sum of the brightness levels in the input image and the blurred image in dependence on the ring likelihoods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.