Gamut mapping using hue-preserving color space
US8437053B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 2010 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Dec 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for applying gamut mapping to an input digital image having an associated input color gamut, to produce an output digital image having an associated output color gamut, which includes: defining a gamut mapping color transform which embodies the operations of transforming input color values from the input color space to linear RGB color values for a linear RGB color space, wherein the linear RGB color space has desirable hue preserving characteristics; transforming the linear RGB color values to determine nonlinear RGB color values; applying a 3×3 matrix transformation to the nonlinear RGB values to an opponent color space; applying a gamut mapping function to map opponent color values within the input color gamut to produce modified opponent color values within the output color gamut; and transforming the modified opponent color values to produce the output color values in the output color space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.