Patent ID: 7733546
Filing Date: 2010-06-08
Classification: G06K,H04N

Abstract:
1. A color image processing apparatus for performing an overlay process of a plurality of color image data so as to express respective colors, comprising: a drift information storing portion that stores an amount of drift among the color image data as color drift information; a boundary detecting portion that determines a portion between a target pixel and a pixel adjacent to the target pixel to be a boundary portion of the color image data when a concentration difference between the target pixel and the adjacent pixel exceeds a preset threshold value; and an image correcting portion that determines whether the boundary portion is a white-on-black portion where no pixel exists or an overlap portion that represents unnecessary overlap by referring to the color drift information stored in the drift information storing portion when the boundary portion is judged, and corrects the color image data by adding, to the white-on-black portion, region image data in which concentrations of the other colors are reduced, and reducing the concentration of the overlap portion.