Image processing apparatus and method for correcting luminance and saturation of a pixel in an image or of a target lattice point in a lookup table
US9036205B2 · kind B2 · utility
8Cited by
9References
14Claims
0Family size
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Key dates
| Filing date | Oct 7, 2013 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Oct 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6027
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gradation-correcting curve to correct a gradation of an input image is generated. Gradation correction based on the gradation-correcting curve is made to a boundary pixel of a color-reproduction space at the same saturation as that of a target lattice point and at a hue of the target lattice point. An equal-saturation line is set by using the boundary pixel of the color-reproduction space after the gradation correction. A saturation-correction amount of the target lattice point is decided based on the gradation-correcting curve and the equal-saturation line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.