Patent ID: 7764897

Claim:
An image forming apparatus comprising: an image forming section configured to form an image on an image bearing member; a control section configured to cause said image forming section to form an adjusting image on the image bearing member; and a sensor configured to detect the adjusting image, wherein said control section is configured to control color registration of the image based on the result of detection by said sensor, and wherein said control section, in order to control the color registration, is configured to: cause said image forming section to form a first reference image having a first density for adjusting a density of the adjusting image, and a second reference image having a second density different from the first density; cause said sensor to detect the first reference image and the second reference image; and determine the first density as a density of the adjusting image, if an output signal level of said sensor at a time of detection of the first reference image is not lower than a predetermined value, and the output signal level of said sensor at a time of detection of the second reference image is lower than the predetermined value.