| 摘要 |
A document authentication apparatus and system is provided comprising a scanner, PC, a central database and a network. The scanner emits a stimulus which illuminates security features such as ink, fibers or planchettes in or on a substrate of a value item such as a check, bank note, credit card or identification document. A sensor(s) receive values relating to the color, coordinates on and depth of the security features in the substrate. The values are digitized and recorded for comparison when a value item is presented for authentication. Matching digitized values indicates a match of the substrates therefore value items.
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