Patent ID: 8019154
Filing Date: 2011-09-13
Classification: H04N

Abstract:
1. A color management method for converting a source color in a source device color space into a corresponding destination color in a destination device color space, comprising: transforming the source color in the source device dependent color space through a transformation sequence into a spectrally-based interim connection space (ICS), so as to obtain a source-side color in the spectrally-based ICS; spectrally gamut-mapping the source-side color so as to obtain a destination-side color in the spectrally-based ICS; and transforming the destination-side color through a transformation sequence into the corresponding destination color in the destination device-dependent color space; wherein said spectral gamut-mapping step comprises: first projecting a spectral gamut onto a three-dimensional color space so as to obtain a color space gamut thereof; second projecting the source-side color onto the three-dimensional color space so as to obtain a projected source-side color; colorimetrically gamut mapping the projected source-side color using the color space gamut so as to obtain a gamut-mapped color space color; third projecting the gamut-mapped color space color onto within a numerical boundary of the color space gamut so as to obtain a numerically stable color space color; inverting the numerically stable color space color so as to obtain a set of feasible points in the spectral gamut, wherein the set of feasible points in the spectral gamut includes one or more destination-side colors in the spectrally-based ICS that lie inside the spectral gamut and that project to the numerically-stable color space color; and choosing one destination-side color from among the one or more destination-side colors in the set of feasible points.