COLOR SHIFT CORRECTING APPARATUS AND METHOD, IMAGE FORMING APPARATUS, COLOR SHIFT CORRECTING PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To achieve an accurate color shift correction, even if the amount of color shift in an image is abnormally large such that it has exceeded a detectable range or a correctable range.;SOLUTION: A pattern formation part 201 in a color printer 100 forms each of correction patterns of a plurality of colors on an transfer belt, in order to correct color shift of an image. The detection part 202 detects an amount of color shift of the correction pattern formed by the pattern formation part 201. At this time, a decision part 203 decides, based on the amount of color shift detected by the detection part 202 as to whether it is necessary to change the setting value for controlling the color shift state of the correction pattern. When it is decided by the decision part 203 that it is necessary to change the setting value, the setting value change part 205 changes the setting value for controlling the color shift state of a correction pattern to a specific setting value.;COPYRIGHT: (C)2007,JPO&INPIT