Patent ID: 8908225

Claim:
An image forming apparatus comprising: a forming unit configured to form an image on a recording material by applying an image formation condition; a reading unit configured to read an image on a recording material, and to output a luminance value; a conversion unit configured to convert the luminance value output by the reading unit into a density value using conversion setting information; a tone correction unit configured to perform tone correction on the density value output by the conversion unit for formation of the image read by the reading unit on a recording material by the forming unit; a storage unit configured to store first conversion setting information for a first recording material; and a control unit configured to control the forming unit to form a tone correction image on the first recording material using a first image formation condition that corresponds to the first recording material, control the forming unit to form the tone correction image on a second recording material different from the first recording material using a second image formation condition that corresponds to the second recording material and is different from the first image formation condition, and generate second conversion setting information for the second recording material using the first conversion setting information stored by the storage unit and a difference between values obtained by the reading unit reading the tone correction images formed on the first recording material and the second recording material, wherein the first conversion setting information is used for converting a luminance value of the image formed on the first recording material into a density value on the first recording material, and the second conversion setting information is used for converting a luminance value of the image formed on the second recording material into the density value on the first recording material.