Patent Document ID: 8705142
Application ID: 12141829
Patent Status: 1

Claim One:
1. A non-transitory computer readable storage medium that stores a tint block image generation program for generating tint block image data for forming, on a print medium, a tint block image including a latent image portion which is reproduced by copying, and a background portion of which copy output density drops, the program causing a computer to execute: a latent image portion generation step of generating data of a plurality of first dots in the latent image portion based on a dot clustered screen; and a background portion generation step of generating data of a plurality of second dots and data of a plurality of third dots dispersed among the second dots and having a size smaller than the second dots in the background portion, wherein one first dot and another first dot adjacent to the one first dot in the latent image portion are arranged at positions on predetermined displacement vectors in an area of the tint block image, one second dot and another second dot adjacent to the one second dot in the background portion are arranged at positions on the predetermined displacement vectors in the area of the tint block image, and the first dot and the second dot adjacent to the first dot are arranged at positions on the predetermined displacement vectors.