Patent ID: 7234791

Claim:
A method for forming a modified digital image by modifying an input digital image having a black input color channel corresponding to a black colorant and one or more additional input color channels corresponding to additional colorants, each color channel having an (x,y) array of image pixel values, to form a modified digital image having one or more modified color channels, said modified digital image being suitable for producing a printed image having reduced ink bleed artifacts on an ink jet printer using the black and additional colorants, comprising: a) forming a filtered black color channel from the black input color channel using a convolution operation; and b) forming the modified digital image by modifying image pixel values in one or more of the additional input color channels in response to the corresponding image pixel values of the filtered black color channel, so that when the modified digital image is used to produce a printed image on an ink jet printer there are reduced ink bleed artifacts.