Image forming apparatus

An image forming apparatus comprising:

• a photosensitive member to be driven to rotate;
• an exposure head including:
• a first chip including a plurality of light emitting elements configured to expose the photosensitive member;
• a second chip including a plurality of light emitting elements configured to expose the photosensitive member;
• and
• a circuit board on which the first chip and the second chip are arrayed at positions different from each other in an intersecting direction intersecting with a rotation direction of the photosensitive member, the first chip and the second chip being arrayed at positions different from each other in the rotation direction and arranged adjacent to each other in the intersecting direction so as to have an overlapping portion at end portions thereof, the image forming apparatus being configured to form an image at a first resolution corresponding to an array interval of the plurality of light emitting elements in the intersecting direction;
• a data generating unit configured to generate, based on input image data, pixel data corresponding to to a second resolution higher than the first resolution;
• a conversion unit configured to convert pixel data equivalent to the second resolution generated by the data generating unit into pixel data equivalent to the first resolution;
• and
• a correction unit configured to correct image data corresponding to the first resolution after converting, to suppress a misregistration amount with respect to the array interval equivalent to the first resolution at the overlapping portion between the first chip and the second chip in the intersecting direction.