Image forming apparatus, image processing method thereof and storage medium storing program for image processing

An image forming apparatus that performs registration control when forming an image on a recording medium, comprising:

• an image processing unit that alters at least a part of a pattern included in the image;
• and
• a correction processing unit that performs alteration on the image, in which at least a part of the pattern has been altered by the image processing unit, for correcting misregistration,
• wherein the image processing unit performs the alteration so that the pattern remains unchanged after the alteration by the correction processing unit.

An image processing method for an image forming apparatus that forms an image on a recording medium, comprising:

• determining correction values for correcting misregistration of an image;
• altering at least a part of a pattern included in the image based on the correction values;
• and
• performing alteration on the image, in which at least a part of the pattern has been altered, for correcting the misregistration based on the correction values.

A storage medium readable by a computer, the storage medium storing a program of instructions executable by the computer to perform a function for image processing to form an image on a recording medium, the function comprising:

• determining correction values for correcting misregistration of an image;
• altering at least a part of a pattern included in the image based on the correction values;
• and
• performing alteration on the image, in which at least a part of the pattern has been altered, for correcting the misregistration based on the correction values.