Image processing device, image reading device and image processing method

摘要

Disclosed herein is an image processing device, including: a gradation converter which converts a gradation value of a target pixel in multilevel image data so that the number of gradations decreases; a resolution which converts creating high-resolution image data having a resolution higher than the multilevel image data by outputting a pixel block capable of reproducing a gradation value which is same as the gradation value obtained by the gradation converter, the pixel block including a predetermined number of pixels; and an error diffusion section which executes a processing for diffusing an error value between the gradation values before a gradation conversion and after the gradation conversion by the gradation converter to peripheral pixels of the target pixel.