Patent ID: 8098400
Filing Date: 2012-01-17
Classification: H04N

Abstract:
1. A computer-implemented method for gamut mapping of source color data in an Interim Connection Space into a destination gamut wherein the Interim Connection Space comprises (1) a first subspace that is a null space of a first transformation comprising a transformation from the Interim Connection Space to a first color space based on a first illuminant, and (2) a second subspace that is an orthogonal complement of the first subspace, the method comprising: using a computer to access the source color data in the Interim Connection Space, the source color data including first color data in the first subspace and second color data in the second subspace; using the computer to access spectral gamut boundary data of the destination gamut in the Interim Connection Space; using the computer to map the second color data into a colorimetric gamut of the destination gamut, based on the spectral gamut boundary data; and using the computer to map the first color data into a spectral gamut at the mapped second color data based on the spectral gamut boundary data, while fixing the mapped second color data, by using minimization of an objective function based on a color difference calculated under a plurality of illuminants.