Patent Document ID: 20160127608
Application ID: 14930871
Patent Status: 0

Claim One:
1. An image processing device comprising: a first image generation unit which generates a first image obtained by applying a first low-pass filter to an input image; a second image generation unit which generates a second image obtained by applying a second low-pass filter to a halftone image corresponding to the input image; a third image generation unit which generates a third image representing a difference between the first image and the second image; a focused dot setting unit which sets a focused dot in the halftone image; a dot placement pixel determination unit which determines a dot placement pixel by comparing pixel values in the third image, the dot placement pixel being a location where a dot is placed when dot displacement processing is performed to improve uniformity of gradation distribution in the third image; and a dot displacing unit which performs the dot displacement processing to displace the focused dot in the halftone image to a position of the dot placement pixel, and updates a dot arrangement of the halftone image.