| 摘要 |
A computer-readable tint block image generation program that causes a computer to execute a tint block image generation step of generating tint block image data including a latent image portion and a background portion which have different output densities to be reproduced during copying has: a camouflage pattern registration step of inputting and storing in a memory multi-grayscale camouflage pattern data; and a tint block image data generation step of generating a latent image portion image data based on a latent image portion screen for an area corresponding to the latent image portion, and generating a background portion image data based on a background portion screen for an area corresponding to the background portion, for grayscale values of the multi-grayscale camouflage pattern data.
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