IMAGE PROCESSING METHOD, IMAGE PROCESSING APPARATUS, PRINTING MEDIUM, RECORDING MEDIUM AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To prevent a copy document that is completely identical with an original document from being prepared even if the density or color of a copier are adjusted anywise. SOLUTION: A first background image 1 in a first color is composed of a first image A1 and a second image A2 of which the area gradations are equal before copy processing but become different after copy processing. A second background image 2 in a second color different from the first color is composed of a third image B1 and a fourth image B2 of which the area gradations are equal before copy processing but become different after copy processing. A page image is formed by combining the first background image 1 and the second background image 2. COPYRIGHT: (C)2005,JPO&NCIPI