Patent ID: 8049932

Claim:
An image forming apparatus comprising: an image processing unit having a first image processing mode and a second image processing mode different from the first image processing mode, said image processing unit processing an image data by said first image processing mode or said second image processing mode; a image forming unit adapted to form a toner image on an image bearing member and form an image on a recording medium by transferring said toner image on the image bearing member on the basis of said image data processed by the image processing unit; a density detection unit adapted to detect a density of said image formed on a recording medium; a storage unit adapted to store in advance a correlation between a density of said image on said recording medium on the basis of said image data processed by said first image processing mode and a density of the image on a recording medium on the basis of said image data processed by said second image processing mode; and a controller adapted to obtain a first correction parameter to correct a density of an image obtained by the first image processing mode on the basis of a result of the detection of said density detection unit and obtain a second correction parameter to correct a density of an image obtained by the second image processing mode on the basis of said first correction parameter and said correlation.