Patent ID: 7770994
Filing Date: 2010-08-10
Classification: H04N

Abstract:
1. An image forming apparatus comprising: a shifting amount of color storage unit adapted to store information of shifting amount of color that represents a shifting amount of color of an exposure position in a sub-scan direction upon exposing the image carrier while scanning the image carrier in a main scan direction; a shifting amount of color compensation amount calculator adapted to calculate a shifting amount of color compensation amount required to compensate the shifting amount of color in the sub-scan direction based on the shifting amount of color; an image data storage unit adapted to store image data formed by a plurality of pixels; an obtaining unit adapted to obtain compensated image data generated by compensating a shifting amount of color of the image data in a pixel unit based on the shifting amount of color in the pixel unit of the shifting amount of color compensation amount; a pixel color density converter adapted to converts a pixel color density of the obtained pixel data based on a shifting amount of color less than a pixel unit of the shifting amount of color compensation amount; a detection unit adapted to detect a feature of a image data group formed by image data in a predetermined region among the image data stored in said image data storage unit; an output unit adapted to output image data in which color density converted pixels by said pixel color density converter have undergone a first processing, or a second processing in which a discontinuousness in an edge portion of the image data is suppressed compared to the first processing, according to the feature of the image data; and an image forming unit adapted image forming using the output image data from said output unit.