Patent ID: 7085006

Claim:
A method for generating two-color print data, comprising the steps of: (a) reducing full-color digital image data to reduced-color digital image data by reducing the color of each pixel in the full-color digital image data to one of eight colors, wherein the color of each pixel in the reduced-color digital image data is defined by first, second and third primary colors, each primary color capable of exhibiting either a first intensity or a second intensity; and (b) generating two-color print data by converting the color of each pixel in the reduced-color digital image data to a main color, a secondary color, or a background color according to the following rules: (1) for each pixel whose three primary colors each exhibit its first intensity convert that pixel to the main color, (2) for each pixel whose three primary colors each exhibit its second intensity convert that pixel to the background color, and (3) for each pixel that does not satisfy either of conditions (1) or (2) convert that pixel to the secondary color.