Patent ID: 8179568

Claim:
A method for minimizing dot visibility in a color marking device capable of dot-on-dot printing, the method comprising: receiving, from a scanning device, input C in ,/M in ,/Y in channels and an input K in of a color image; summing said received C in ,/M in ,/Y in inputs to obtain a total remaining CMY ink coverage, sum 0 ; determining an amount of overlapping CMY; adding said input K in to said amount of overlapping CMY to obtain K out ; subtracting said amount of overlapping CMY from each C in ,/M in ,/Y in to obtain a density, C 1 , M 1 , Y 1 ; summing said densities to obtain a total CMY density, sum 1 ; determining a minimum total secondary RGB coverage; determining a minimum amount of each secondary RGB color coverage comprising rgb_area=max(sum 1 −100+K out , 0); determining a minimum amount of each primary CMY color coverage; halftoning a color marking device using said determined minimum color coverages; and rendering said color image using said color marking device.