| 摘要 |
PROBLEM TO BE SOLVED: To protect a printed item image from a fraudulent operation by adding an information index gloss mark image to the printed item. SOLUTION: The gloss mark information index image is realized by printing the gloss mark information index image on a printed item, selecting a first halftone having a first anisotropic structure orientation, selecting a second halftone having a second anisotropic structure orientation different from the first halftone, applying the first halftone at least to a part of the gloss mark information index image, and applying the second halftone to the rest of the gloss mark information index image, so that a printed item can be protected. COPYRIGHT: (C)2004,JPO
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