IMAGE PROCESSING DEVICE, IMAGE FORMING DEVICE, IMAGE PROCESSING METHOD, COMPUTER PROGRAM, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an image processing device capable of generating a halftone image which can suppress density unevenness in a low-density area.SOLUTION: A tone reproduction processing unit 110 of an image processing unit 3 executes error diffusion processing on a neighboring pixel to which an error is diffused in a processing direction of a pixel of interest using a threshold matrix in which a quantization threshold in a low-density area having a predetermined pixel value or smaller is arranged in the processing direction in order from a large value to a small value.