Image forming apparatus configured to perform halftone processing

An image forming apparatus comprising:

• a photoconductor;
• a scanning unit, including a mirror, configured to form an electrostatic latent image on the photoconductor by scanning the photoconductor with one or more scanning beams in a main scanning direction based on an image signal, repetitively in a sub-scanning direction perpendicular to the main scanning direction;
• and
• an image controller, including a memory, configured to perform halftone processing on image data to generate the image signal,
• wherein the memory stores correction information for correcting a scanning start position of the one or more scanning beams for the photoconductor,
• wherein the image controller sets the correction information so that scanning start positions of a plurality of scanning lines that are successive in the sub-scanning direction formed on the photoconductor by the one or more scanning beams are linearly displaced to either a negative side or a positive side of the main scanning direction along the sub-scanning direction, in accordance with a direction of a first vector forming a smaller angle with the sub-scanning direction among two vectors in the halftone processing.