Image forming apparatus that adjusts image forming conditions

An image forming apparatus comprising:

• a conversion unit configured to convert image data based on a tone correction condition,
• an image forming unit configured to form an image based on the image data converted by the conversion unit;
• an intermediate transfer member configured to have the image transferred thereto and to convey the image;
• a sensor configured to measure light reflected from the intermediate transfer member;
• a controller configured to control the image forming unit to form a plurality of measurement images, to control the sensor to measure light reflected from the plurality of measurement images, to control the sensor to measure light reflected from a first area of the intermediate transfer member, to control the sensor to measure light reflected from a second area of the intermediate transfer member, and to control the sensor to measure light reflected from a third area of the intermediate transfer member;
• a generation unit configured to generate the tone correction condition based on a measurement result of the plurality of measurement images;
• and
• an obtaining unit configured to determine, from a plurality of measurement results of the first area, first information relating to a tendency of the measurement results of the first area, to determine, from a plurality of measurement results of the second area, second information relating to a tendency of the measurement results of the second area, and to determine, from a plurality of measurement results of the third area, third information relating to a tendency of the measurement results of the third area,
• wherein the generation unit is configured to control, based on the first information and the second information, whether the tone correction condition is generated based on a measurement result of a first measurement image formed between the first area and the second area, with respect to a conveyance direction in which the intermediate transfer member conveys the plurality of measurement images,
• the generation unit is configured to control, based on the second information and the third information, whether the tone correction condition is generated based on a measurement result of a second measurement image formed between the second area and the third area, with respect to the conveyance direction,
• the first area corresponds to an area, on an upstream side of the first measurement image with respect to the conveyance direction, in which other measurement images included in the plurality of measurement images are not formed,
• the second area corresponds to an area, between the first measurement image and the second measurement image with respect to the conveyance direction, in which other measurement images included in the plurality of measurement images are not formed, and
• the third area corresponds to an area, on a downstream side of the second measurement image with respect to the conveyance direction, in which other measurement images included in the plurality of measurement images are not formed.