Patent ID: 7933528

Claim:
An image forming apparatus comprising: a first image forming unit that includes a rotatable first image carrier on which a base toner image is formed by exposure and development based on input image data, transfers the base toner image formed on the first image carrier to an intermediate transfer member, and forms an image; a plurality of second image forming units that are disposed downstream of the first image forming unit in a moving direction of the intermediate transfer member, the second image forming units each including a rotatable second image carrier on which different color toner images are formed by exposure and development based on input image data, the second image forming units each transferring the different respective color toner images formed on the second image carriers to the intermediate transfer member, and forming images; a transport unit that transports a recording medium; a transfer unit that transfers, to the recording medium transported by the transport unit, the base toner image and the color toner images that have been transferred to the intermediate transfer member; a fixing unit that fixes the base toner image and the color toner images that have been transferred to the recording medium by the transfer unit, the base toner image being formed beforehand in a region where a single color is to be transferred onto the intermediate transfer member from the second image carriers of the second image forming units, and a correction unit that, on the basis of the density of the color toner images that have been transferred to the intermediate transfer member: corrects a development amount of the base toner by correcting a exposure amount with respect to the first image carrier, or corrects a development amount of the color toners by correcting a exposure amount with respect to the second image carriers; or corrects the development amount of the base toner by correcting the exposure amount with respect to the first image carrier, and also corrects the development amount of the color toners by correcting the exposure amount with respect to the second image carriers.