Patent ID: 8649062

Claim:
An image processor adapted to generate image data to be output as necessary for printing, based on comparisons between pixels of input image data and thresholds in a dither matrix associated with the pixels, the image processor comprising: a color image determiner configured to determine whether or not the input image data is color image data; a prescribed saturation determiner configured to determine whether or not the respective pixels of the input image data determined as color image data by the color image determiner have a value greater in color saturation than a prescribed saturation value of a composite black; a threshold changer configured to change a threshold for each color in the dither matrix associated with a pixel determined as having a value greater than the prescribed saturation value by the prescribed saturation determiner to make the threshold different in correspondence to each color component value of the pixel; and a first output pixel data generator configured to generate color component values to be output for the pixel, based on comparisons between the color component values of the pixel and the thresholds changed by the threshold changer.