Image forming apparatus and method calculating a deviation between a) a representative point of threshold information I) nearest to the coordinate of a pixel of interest or II) in dither space nearest to the address coordinate of the pixel of interest in dither space, and b) the address coordinate in dither space corresponding to a pixel coordinate of an integer in pixel space or a pixel coordinate of an integer in pixel space nearest to the representative point

摘要

An image processing apparatus makes for making the halftone processing that can suppress a periodic pattern by periodically changing the correction amount while suppressing a dispersion in the area of each dot at a low computation cost.