Patent ID: 11934121
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An image forming apparatus comprising:
an image forming unit configured to form an image and a detection image on a sheet based on an image forming condition that adjusts image quality;
a fixing unit configured to fix the image and the detection image formed by the image forming unit on the sheet;
a reading unit including:
a reading sensor configured to read the detection image on the sheet which passes a reading area downstream of the fixing unit in a conveyance direction along which the sheet is conveyed; and
a reference member; and

a controller configured to control a positional relationship between the reading unit sensor and the reference member to read the reference member by the reading sensor,
wherein, in a case where both of the image and the detection image are to be formed on each of a plurality of sheets by the image forming unit, the plurality of sheets pass the reading area in a period during which a shading correction, which includes a process in which the reading sensor reads the reference member, is performed,
wherein the reading sensor is configured to not read the detection image on one or more first sheets included in the plurality of sheets in the period during which the shading correction is performed, and
wherein the image forming condition is adjusted based on a reading result of the detection image read by the reading sensor on one or more second sheets included in the plurality of sheets, the one or more second sheets not including the one or more first sheets, in the period during which the shading correction is not performed.