Patent ID: 8643904

Claim:
An image processing device comprising: a converting unit that is configured to convert original image data to converted image data by performing a scaling process and a color conversion process on the original image data, the original image data including a plurality of sets of original pixel data, the converted image data including a plurality of sets of converted pixel data, each set of converted pixel data corresponding to at least one set of original pixel data, the converting unit producing each set of converted pixel data based on the corresponding at least one set of original pixel data, each set of converted pixel data including a plurality of color values, the plurality of color values corresponding to a plurality of color materials, each color value indicating an amount of one of the plurality of color materials; a determining unit that is configured to determine, for each set of converted pixel data, whether or not at least one set of original pixel data corresponding to the each set of converted pixel data includes predetermined pixel data; a halftone unit that is configured to produce output image data based on the converted image data, the halftone unit including: a selecting unit that is configured to select, for each set of converted pixel data, a first halftone method when the determining unit determines that no set of original pixel data corresponding to the each set of converted pixel data includes the predetermined pixel data, and a second halftone method different from the first halftone method when the determining unit determines that the at least one set of original pixel data corresponding to the each set of converted pixel data includes the predetermined pixel data; and a pixel data halftone unit that is configured to produce a set of output pixel data for each set of converted pixel data in accordance with one of the first halftone method and the second halftone method selected by the selecting unit; and a transmitting unit that is configured to transmit the output image data to an image forming unit, the image forming unit forming the output image on a recording medium based on the output image data, the image forming unit reproducing a plurality of colors that is contained in a prescribed color range, the plurality of colors having a plurality of saturations, wherein the predetermined pixel data represents a color having a saturation largest among the plurality of saturations.