Patent ID: 7289246

Claim:
A printing system which prints an image on a medium used for printing by a print head having a plurality of nozzles capable of forming a dot, comprising: an image data acquisition section that acquires first image data including pixel data constituting the image, which shows a pixel density value of M (M≧3); a nozzle information storing section that stores nozzle information which shows a characteristic of each nozzle; a nozzle usage information determination section that determines whether to use a nozzle corresponding to each pixel data of the image data, based on the nozzle information; a density value modification section that modifies a first density value of the pixel data set as non-use to a second density value lower than the first density value; an increment-correction section that increment-corrects the first density value of the pixel data of which a density value is modified by the density value modification section; a density value distribution section that distributes the increment-corrected density value to a predetermined pixel located adjacent to the pixel of the increment-corrected pixel data for the image data after the modification of the first density value; a print data generating section that generates print data to prescribe information about the dot formation of each nozzle corresponding to the image data after the distribution of the increment-corrected density value; and a print section that prints the image on the medium by the print head, based on the print data.