Patent ID: 8837995

Claim:
An image forming apparatus comprising: a plurality of image forming units; an image bearing member configured to bear images formed by said image forming units; a table indicative of a correspondence relationship between temperature and an amount of a color misregistration; a pattern detection unit configured to detect color registration patterns on said image bearing member; a calculation unit configured to calculate the amount of the color misregistration based on the detection result of the color registration patterns by said pattern detection unit; a temperature detection unit configured to detect temperature; a color registration adjustment unit configured to have a first mode in which color registration adjustment is performed based on the amount of the color misregistration calculated by said calculation unit, and a second mode in which the amount of the color misregistration is predicted based on the temperature detected by said temperature detection unit using said table and color registration adjustment is performed based on the predicted amount of the color misregistration; and an updating unit configured to make said image forming units form the color registration patterns when the temperature detected by said temperature detection unit reaches a predetermined temperature, and to update said table based on the amount of the color misregistration calculated by said calculation unit based on the detection result of the color registration patterns by said pattern detection unit.