COLOR IMAGE PROCESSING DEVICE

摘要

A color image processing device uses a dither pattern of blocks, each including a plurality of dots representing the gradations of each pixel of an image in a prescribed print region. The dots including one block are arranged in a growth sequence in the ascending order of gradation, and print data is written sequentially at the dots the number of which corresponds to the gradation associated with the block. An extracting unit extracts a data region holding the color components from the print data. A dither processing unit generates dither patterns for the color components extracted by the extracting unit. The dither processing unit detects whether one or more of the dots including each of the pixels forming the image are outside the data region, and moves any dot outside the data region to a certain dot including the same pixel and existing in the data region.

主权项

1. A color image processing device using a dither pattern of blocks each composed of a plurality of dots representing the gradations each pixel of an image in a prescribed print region,
wherein the dots constituting one block are arranged in a growth sequence in the ascending order of gradation, and print data of the image is written sequentially at the dots the number of which corresponds to the gradation of the pixels associated with the block; an extracting unit is provided to extract a data region holding the color components, from the print data of the image; a dither processing unit is provided to generate dither patterns for the color components extracted by the extracting unit; and the dither processing unit detects whether one or more of the dots constituting each of the pixels constituting the image are outside the data region, and moves any dot outside the data region to a certain dot constituting the same pixel and existing in the data region.