Patent ID: 8610959

Claim:
A method for generating a fleet CMYK to engine cmyk LUT in a color management system, the method comprising: creating a CMYK node file of colors in a CMYK space; receiving a printer model of a fleet of document reproduction devices; passing each CMYK value from the said CMYK node file through said fleet printer model to obtain corresponding L*a*b* values; selecting at least a subset of said corresponding L*a*b* values as L*a*b* target values; for each given CMYK node, defining an auxiliary input T comprising user defined parameters specified for each input node in said CMYK node file; adding set T to said set of L*a*b* target values to generate a set L*a*b*T of target 4 vectors; iterating on any of: a printer and a printer model, wherein at each iteration, a set of constrained output t is formed, said iterating terminating at any of: a convergence of a measured L*a*b* and said constrained output set t to said target set L*a*b*T within a pre-determined error limit, and a maximum number of iterations having occurred; and generating a 4-to-4 CMYK to cmyk LUT using CMYK and device cmyk values at an end of said iteration.