Patent ID: 8659629

Claim:
An image forming apparatus to form an image, the image forming apparatus comprising: an optical writing device including writing units for each of a plurality of colors, the writing units being configured to write an image of image data by applying light corresponding to image data a temperature detecting unit disposed at the writing units for each of the plurality of colors in the optical writing device, the temperature detecting unit being configured to detect temperature of the writing units for each of the plurality of colors; and an adjustment processing unit that is configured to determine whether to perform a process for adjusting color registration of the image and, if the adjustment processing unit determines the process is to be performed, calculate, with respect to each of the plurality of colors a temperature difference between a past temperature detected by the temperature detecting unit for the color and a current temperature detected by the temperature detecting unit for the color, calculate a first difference between the temperature difference of a reference color of color registration correction, from among the plurality of colors, and the temperature difference of another color, from among the plurality of colors, and if the first difference is out of a reference range, form a quality verification image and perform a process for adjusting color registration of the image by using the quality verification image.