Patent ID: 7164498
Filing Date: 2007-01-16
Classification: H04N

Abstract:
1. A method for representing a digital image in an extended CMYK color space that has an extended color gamut, the image for output to an output device that uses a set of more than four colorants and is capable of reproducing the extended color gamut, the method comprising: providing a transformation from the extended CMYK color space to amounts of each of the set of colorants of the output device, wherein the extended CMYK color space is a CMYK color space that has an extended color gamut that is wider and/or has more dynamic range than CMYK using real CMYK inks, wherein the C, M, Y, and K values of the extended CMYK color space do not necessarily represent amounts of real inks of a real output device; representing the digital image in the extended CMYK color space, such that the digital image can be manipulated as if it was a CMYK image using real CMYK values, such that the color of a print produced by printing the colorant values obtained by transforming a first set of extended CMYK values obtained by the device profile converting a set of color coordinate values in the first color space substantially matches the color represented by the set of color coordinate values in the first color space.