| 摘要 |
<p>One reading sensor is used to read identification mark information, to decide whether a product is genuine. Identification marks each having sensitivity adjustment for the reading sensor and specific mark information are printed on a sheet of release coated paper. The sensitivity adjustment for the reading sensor is performed by utilizing information on a density acquired by reading the identification mark. By combining pieces of density information on a plurality of marks that constitutes the identification mark, mark information is generated. This mark information is checked against saved mark information. In this case, by utilizing the identification mark in which the plurality of identical marks are sequentially shifted in a traveling direction, even a reading sensor constituted of a single light-emitting element and a single photoreceptor element can acquire the mark information on the identification marks. The read mark information and the mark information contained in barcode information are checked against each other and, if they agree, it is decided that the product is genuine and a result of the decision is displayed.</p> |
