Printing device and printing method

摘要

When dot data indicating whether or not a dot is to be formed is formed based on the gradation value for each pixel forming an image, dots belonging to a plurality of pixel groups are printed in a common region in an overlapping manner, and the distribution of dots formed in the common region has a noise characteristic possessing a peak in the spatial frequency region on the high-frequency side. In a case where first and second pixels belonging, respectively, to two pixel groups are proximal pixels in the common region in a predetermined gradation range in which probabilities k1 and k2 at which a dot is formed in the first and second pixels are such that k1<0.5 and k2<0.5, a probability K of a dot being formed in both of the proximal pixels is set to be close to k1·k2.

主权项

1. A printing device for forming dots in pixels arranged on a printing medium according to an input image data and printing an image to perform printing of an output printed image, the printing device comprising:
a printing unit configured to print the output printed image by dividing formation of the dots in a common region into a plurality of pixel groups, in a case where first and second pixels belonging, respectively, to two pixel groups among the plurality of pixel groups are proximal pixels in a predetermined gradation range in which probabilities k1 and k2 at which a dot is formed in the first and second pixels are such that k1<0.5 and k2<0.5, a probability K of a dot being formed on both of the proximal pixels is set to be close to k1·k2.