Patent ID: 7075561
Filing Date: 2006-07-11
Classification: G03G,H04N

Abstract:
1. An image printing apparatus which includes a plurality of image printing means for printing images of different colors and prints a color image by superimposing, on a single image printing medium, a plurality of images of the respective colors printed by the plurality of image printing means, comprising: test image-printing means for printing, on the image printing medium, test images for correcting a positional offset between images of the respective colors; correction amount deriving means for deriving a positional offset correction amount for the images of the respective colors by measuring the test images printed on the image printing medium; correction means for correcting a printing position of an image printed by said each image printing means; and control means for controlling a series of correcting operations for correcting a positional offset between the images of the respective colors, wherein said control means executes the correcting operation in a first stage and a second stage, corrects a positional offset on a pixel basis in the first stage until the positional offset correction amount reaches a predetermined target range, and corrects a positional offset including a correction amount less than a pixel unit in the second stage.