Patent ID: 7283282

Claim:
A method for adjusting a color in a color proof printed with primary colors cyan, magenta, yellow, and black: a) combining a cyan binary bit map, a magenta binary bitmap, a yellow binary bitmap, and a black binary bitmap to form an image comprising 4-bits per pixel; b) using said 4-bit per pixel image to identify colors selected from a group comprising red, cyan, green, magenta blue, yellow, and neutral; and c) for each of said primary colors, perform the steps in sequence: 1) loading a color donor selected from a group comprised of said primary colors; 2) setting a density for said loaded color donor for an amount of color donor in each of said colors in said group; 3) calculating a set of exposures needed to image said densities; 4) setting a maximum exposure level which is a number greater than or equal to a maximum of said set of exposures; 5) calculating a pulse width modulation level for said set of exposures using said set maximum exposure level; and 6) printing said color donor at said set maximum exposure level using said pulse width modulation level for each level of said 4-bit per pixel image in a single pass.