Patent ID: 7845572
Filing Date: 2010-12-07
Classification: B41M,B42D,G03G,G07D,H04N

Abstract:
1. A method of incorporating a latent image in an apparent solid-color background for representing a desired solid-color background having a target color comprising steps of printing an underlying solid-color background on a print medium using a first color composition that differs from the target color, printing line-screen patterns on the print medium over an area in common with the solid-color background embedding the latent image in a visually integrated setting using a second color composition that differs from both the first color composition and the target color, matching visual characteristics of the line-screen patterns forming the latent image and the visually integrated setting for rendering the latent image practically indistinguishable from the visually integrated setting without a visual aid, and interrelating print densities of the line-screen patterns and the first and second color compositions so that the line-screen patterns in combination with the underlying solid-color background produce the apparent solid-color background in the target color.