Patent ID: 7215897

Claim:
An image forming apparatus comprising: an image forming unit including an image carrier, said image forming unit forming both a first pattern image and a second pattern image different from the first pattern image on the image carrier; a first detecting unit that detects the first pattern image; a second detecting unit that detects the second pattern image and a surface state of the image carrier; and a control unit that controls a first adjusting operation for adjusting said image forming unit and a second adjusting operation different from the first adjusting operation, wherein said control unit controls the first and second adjusting operations in a manner such that the first adjusting operation is carried out based on a result of the first pattern image detected by said first detecting unit, and the second adjusting operation is carried out based on a result of the second pattern image detected by said second detecting unit and the surface state of the image carrier detected by the second detecting unit in timing in which detection of the first pattern image is carried out by the first detecting unit.