Patent ID: 6880907

Claim:
A method of processing color image data for printing on a color ink jet printer, the method comprising: reading color image data from a source image, the source image containing color image data of at least a first color area and a second color area; calculating a first density of pixels of the first color, calculating a second density of pixels of the second color, and comparing the first density to the second density; identifying a border region between the first color area and the second color area only if the first density and the second density match predetermined criteria which necessitates altering pixels along the border, performing a pixel altering function to alter pixels of the source image along the border region between the first color area and the second color area; converting the source image into a plurality of halftone images after performing the pixel altering function; and printing the halftone images using ink of the first and second colors according to the first and second color areas.