Image processor for processing an image with an error diffusion process and image processing method for processing an image with an error diffusion process

Abstract

Error addition section generates correction data by adding correction value Emo and correction value E to the input data. Binary processing section converts the correction data to binary data to generate output data. Binary error calculation section calculates binary error E based on the correction data and output data. Propagation coefficient judgment section judges propagation coefficients K to K Propagation error operation section operates on binary error E and propagation coefficients K to K to calculate correction value E and correction value Emi. Error memory temporarily stores correction value Emi, and outputs it to error addition section when the pixel data to be corrected is input.