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

摘要

Error addition section 201 generates correction data by adding correction value Emo and correction value E1 to the input data. Binary processing section 202 converts the correction data to binary data to generate output data. Binary error calculation section 203 calculates binary error E based on the correction data and output data. Propagation coefficient judgment section 204 judges propagation coefficients K1 to K4. Propagation error operation section 205 operates on binary error E and propagation coefficients K1 to K4 to calculate correction value E1 and correction value Emi. Error memory 206 temporarily stores correction value Emi, and outputs it to error addition section 201 when the pixel data to be corrected is input.