An image forming apparatus that performs registration control when forming an image on a recording medium includes: a correction value determining unit that determines correction values for correcting misregistration of an image; an image processing unit that alters at least a part of a pattern included...http://www.google.com.au/patents/US20070165283?utm_source=gb-gplus-sharePatent US20070165283 - Image forming apparatus, image processing method thereof and storage medium storing program for image processing
