Joint enhancement of lightness, color and contrast of images and video
US9053523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2013 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In some embodiments, color and contrast enhancement video processing may be done in one shot instead of adjusting one of color and contrast enhancement, then the other, and then going back to the first one to readjust because of the second adjustment. In some embodiments, global lightness adjustment, local contrast enhancement, and saturation enhancement may be done at the same time and in parallel. Lightness adjustment improves visibility of details for generally dark or generally light images without changing intended lighting conditions in the original shot, and is used to enhance the range of color/saturation enhancement. Local contrast enhancement done in parallel improves visual definition of objects and textures and thus local contrast and perceived sharpness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.