System and method for adaptive contrast enhancement of video signals
US8154663B2 · kind B2 · utility
1Cited by
5References
29Claims
0Family size
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Key dates
| Filing date | Jan 16, 2007 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Feb 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for contrast enhancement of a video signal comprises receiving a video signal frame, gathering statistics about the video signal frame, calculating the effective input dynamic range of the video signal frame, calculating the effective output dynamic range of the video signal frame, and constructing a transform to enhance the picture in the video signal frame by mapping the effective input dynamic range to the effective output dynamic range via the transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.