Patent ID: 9108428
Filing Date: 2015-08-18
Classification: B41J

Abstract:
1. An image forming apparatus configured to form an image on a recording medium using a black color material and a plurality of chromatic color materials, the image forming apparatus comprising: a generation unit configured to determine whether a color of input image data is positioned at a surface of a dark portion in a color gamut that can be reproduced using the black color material and the plurality of chromatic color materials and select a first generation process when the color of input image data is determined to be positioned at the surface and select a second generation process when the color of input image data is determined not to be positioned at the surface, the first generation process and the second generation process being for generating black color material data for arranging a dot of the black color material on the recording medium and a plurality of pieces of chromatic color material data for arranging a dot of the plurality of chromatic color materials on the recording medium; and a formation unit configured to form an image on the recording medium using the black color material and the plurality of chromatic color materials based on the black color material data and the plurality of pieces of chromatic color material data, wherein the first generation process is configured to generate the black color material data and the plurality of pieces of chromatic color material data, for the color positioned at the surface, in such a way as to arrange dots of the black color material and respective dots of the plurality of chromatic color materials exclusively on the recording medium and set a rate of the arranged dots of the black color material to be greater as the color positioned at the surface is closer to black, and wherein the second generation process is configured to generate the black color material data and the plurality of pieces of chromatic color material data, for the color not positioned at the surface, in a way different from the first generation process.