Patent ID: 7308135
Filing Date: 2007-12-11
Classification: H04N

Abstract:
1. A method for reconstructing an extended color gamut digital image from a limited color gamut digital image represented in a particular limited color gamut color space which was derived from an initial extended color gamut image, comprising: a) transforming the limited color gamut digital image in the particular limited color gamut color space to a reference color space forming a limited color gamut digital image in a reference color space; b) providing a modified inverse color adjustment function which, when such function operates on the limited color gamut digital image in the reference color space, produces the reconstructed extended color gamut digital image having reduced highlight color saturation for highlight color values when compared with corresponding color values of the initial extended color gamut image; and c) operating on the limited color gamut digital image in the reference color space with the modified inverse color adjustment function to form the reconstructed extended color gamut digital image having reduced levels of color contouring and quantization artifacts.