Printing apparatus, control method thereof, control program thereof, and manufacturing method of printing material

摘要

A printing apparatus is provided with a CPU. The CPU generates dot data where dots are regularly distributed and arranged in a case where gradation values which are represented by image data are a predetermined value or less by using a dither mask where thresholds are set for each printing pixel and comparing the gradation values of each of the pixels which configure the original image and the thresholds for each of the printing pixels which are set in the dither mask, and generates the dot data such that the degree of regularity of the dots which are distributed and arranged is reduced as the gradation values are increased in a case where the gradation values which are represented by the image data exceed the predetermined value through execution of a dot data generating module.

主权项

1. A printing apparatus which performs printing on a printing medium, comprising:
a dot data generating section which generates dot data which indicates a dot formation state for each printing pixel in a printing image which is to be formed on the printing medium by performing a half-toning process with regard to image data which represents gradation values of each pixel which configures an original image; and a printing image generating section which generates the printing image by forming dots at each of the printing pixels according to the dot data, wherein the dot data generating section generates the dot data by using a dither mask where thresholds are set for the printing pixels and comparing the gradation values of the pixels which configure the original image and the thresholds for the printing pixels which are set in the dither mask, with the thresholds equal to a predetermined value or less being assigned in the dither mask such that the thresholds equal to the predetermined value or less are regularly arranged in the dither mask, and the thresholds exceeding the predetermined value being assigned in the dither mask such that the degree of regularity of the dots is reduced as the gradation values increase in a case where the gradation values which are represented by the image data exceed the predetermined value.