Image processing device

Abstract

An image processing device includes a storing unit and a creating unit. The storing unit stores a dither matrix. The dither matrix has a plurality of dot regions and has a threshold value at each of the dot regions. The plurality of dot regions are divided into a plurality of sub-matrices. The creating unit is configured to create binary image data by comparing an input value to the threshold value. The plurality of sub-matrices includes a first sub-matrix and a second sub-matrix. The first sub-matrix has a first threshold value smallest among threshold values in the first sub-matrix. The second sub-matrix has a plurality of threshold values that are smaller than the first threshold value and are arranged adjacent to each other. Each of all remaining sub-matrices has at least one threshold value smaller than the first threshold value. The plurality of sub-matrices include a third sub-matrix and a fourth sub-matrix. The third sub-matrix has a second threshold value largest among threshold values in the third sub-matrix. The fourth sub-matrix has a plurality of threshold values that are larger than the second threshold value and are arranged adjacent to each other. Each of all remaining sub-matrices has at least one threshold value larger than the second threshold value.

Dependencies are inferred from the claim text.