Dai Nippon Printing Co., Ltd.

Hiroaki Takita

Yoshihiko Tamura

Takayuki Ohkubo

An image data generation device is provided with: an image data acquisition unit for acquiring image data; a division unit for spatially dividing the acquired data by a plurality of matrices; a priority order setting element for setting the priority order for performing gradation conversion of picture elements that make up the image data that corresponds to each of the matrices, and sets the priority order so that the priority order becomes lower going from picture elements located in the center of the matrix toward picture elements located on the outside edges of the matrix; a gradation conversion member for performing gradation conversion of the picture elements according to the priority order; and an image data generation unit for generating image data for printing based on a dot pattern that is formed by the picture elements after the gradation conversion.

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Tokyo, Japan

Hiroaki Takita