Image forming apparatus that controls a target temperature of a heating member based on whether pixels for forming an image are a predetermined density or more

An image forming apparatus comprising:

• an image forming portion configured to form an image on a recording material;
• a fixing portion including a cylindrical heat transfer member, a heating member contacting an inner surface of said heat transfer member, and a pressing member for forming a nip, in which said pressing member nips and feeds the recording material in cooperation with said heating member through said heat transfer member, said fixing portion being configured to fix the image on the recording material by heating the recording material, on which the image has been formed, by heat from said heating member through said heat transfer member;
• and
• a control unit configured to control a target temperature of said heating member, wherein, for a plurality of pixels, of image data corresponding to the image to be formed on the recording material, in each interval corresponding to a circumferential length of said heat transfer member with respect to a recording material feeding direction, said control unit acquires a first number of pixels for forming an image with a predetermined density or more, and, for a plurality of pixels, of an image that has already been printed on a side of the recording material opposing said pressing member, in each interval corresponding to a circumferential length of said pressing member, with respect to the recording material feeding direction, said control unit acquires a second number of pixels for forming an image with a predetermined density or more, and said control unit sets the target temperature depending on the first number of pixels and the second number of pixels.