Image forming apparatus and image forming method that corrects test pattern data and image data based on color displacement amount

摘要

An image forming apparatus includes an intermediate transfer body; a generating unit generating test pattern data; a storage unit storing a color displacement amount; a correcting unit correcting the test pattern data and image data based on the color displacement amount currently stored in the storage unit; a forming unit forming a test pattern based on the test pattern data corrected by the correcting unit on the intermediate transfer body at predetermined intervals, and forming an image based on the image data corrected by the correcting unit on the intermediate transfer body; a detecting unit detecting the test pattern formed on the intermediate transfer body; an updating unit determining an amount of change of the color displacement amount from a result of detection by the detecting unit, and updating the color displacement amount stored in the storage unit by using the amount of change of the color displacement amount.

主权项

1. An image forming apparatus comprising:
an intermediate transfer body; a generating unit configured to generate test pattern data; a storage unit configured to store a color displacement amount; a correcting unit configured to correct the test pattern data and image data based on the color displacement amount currently stored in the storage unit; a forming unit configured to form a test pattern based on the test pattern data corrected by the correcting unit on the intermediate transfer body at predetermined intervals, and configured to form an image based on the image data corrected by the correcting unit on the intermediate transfer body; a detecting unit configured to detect the test pattern formed on the intermediate transfer body; and an updating unit configured to obtain an amount of change of a color displacement amount from a detection result of the detecting unit, and add a product of the obtained amount of change of the color displacement amount and a first coefficient, with the color displacement amount stored in the storage unit.