Image halftone processing by dithering or error diffusion based on pixel value or times of printing

摘要

An image processing apparatus that generates image data for forming an image by performing printing a plurality of times on the same area of a printing medium. The image processing apparatus includes: a division unit configured to divide the image data into first image data and second image data by comparing a pixel value indicating a density of a pixel with a predetermined threshold value for each pixel constituting the image data so that the first image data includes pixels whose pixel value is equal to or greater than the predetermined threshold value and the second image data includes pixels whose pixel value is less than the threshold value; a first halftone processing unit configured to perform dither processing on the first image data; and a second halftone processing unit configured to perform error diffusion processing on the second image data.