| 摘要 |
A method of authenticating a first document (270) including content (271) and a barcode (272). The barcode (272) comprising barcode elements each having a predetermined form. A plurality of the barcode elements of the barcode are detected in a representation of the first document (270). A visual difference between each of the detected barcode elements and the predetermined form of the barcode element is determined. The barcode (272) is decoded to determine a second document. The first document (270) and the second document are compared based on the determined visual difference, in order to authenticate the first document (270).
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