Video contrast enhancement with sub-segments
US9245331B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | May 20, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Aug 19, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20204
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for image contrast enhancement using sub-segments. A coarse piecewise linear transform is formed based on the intensity distribution in an image, the segments of the piecewise linear transform selected to produce, when the piecewise linear transform is applied to the image, an improved intensity distribution, e.g., one approximating a Rayleigh distribution. A fine piecewise linear transform is formed by forming sub-segments at each of the breakpoints of the coarse piecewise linear transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.