IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD

摘要

An image forming apparatus includes a γ conversion unit configured to perform γ conversion on image data acquired by scanning an image; an image forming unit configured to form the image data on an image carrier and a transfer sheet; a first and second calibration units respectively configured to perform first and second calibrations of generating a calibration parameter to be set in the γ conversion unit, based on a scan value of a plurality of gradation patterns formed on the transfer sheet and the image carrier; and a changing unit configured to change the calibration parameter or a calibration amount with respect to the second calibration, based on a first calibration result of the first calibration, a second calibration result of the first calibration executed after a property of the image forming unit has changed, and a calibration result of the second calibration.

主权项

1. An image forming apparatus comprising:
a scanning unit configured to scan an original image and acquire image data; a γ conversion unit configured to perform γ conversion on the image data; an image forming unit configured to form the image data on an image carrier and a transfer sheet; a first calibration unit configured to perform first calibration of generating a calibration parameter to be set in the γ conversion unit, based on a scan value of a plurality of gradation patterns formed on the transfer sheet; a second calibration unit configured to perform second calibration of generating a calibration parameter to be set in the γ conversion unit, based on a scan value of a plurality of gradation patterns formed on the image carrier; and a changing unit configured to change the calibration parameter or a calibration amount with respect to the second calibration, based on a first calibration result of the first calibration, a second calibration result of the first calibration executed after a property of the image forming unit has changed, and a calibration result of the second calibration.