Image forming apparatus

An image forming apparatus configured to operate in a first mode in which an image is formed in a first color gamut, and a second mode in which an image is formed in a second color gamut which is different from the first color gamut, the image forming apparatus comprising:

• a photosensitive drum;
• an exposure unit configured to form an electrostatic latent image by exposing the photosensitive drum;
• a developing roller configured to form a toner image by developing the electrostatic latent image which is formed using a toner on the photosensitive drum by the exposure unit;
• an intermediate transfer member to which the toner image formed on the photosensitive drum by the developing roller is transferred;
• a density detection unit configured to detect the density of the toner image transferred to the intermediate transfer member;
• and
• a controller configured to adjust the density of the toner image on the basis of a value of input image data which is inputted,
• wherein the image forming apparatus is operable so as to control a peripheral velocity ratio between a peripheral velocity of the developing roller and a peripheral velocity of the photosensitive drum in the second mode to be greater than the peripheral velocity ratio in the first mode, and
• in at least a part of the input image data in which the density of an image to be formed is on a low density region side, the density of the toner image which is formed in the first mode is higher than the density of the toner image which is formed in the second mode.