Authentication method and manufacturing method of the digital information card is printed with a digital watermark technology, and these devices

摘要

In order to produce a card that is printed to have a digital information, digital images to be printed on the card, with the authentication information or are fabricated using the information provided by the applicant requesting the issuance of the card It is fabricated using the issued information extracted from the database. At the same time, the generated watermark using the authentication information, the watermark is embedded in the digital image, the digital watermark image is embedded is printed on the card. Therefore, it is captured from a digital image generated by scanning the printed image, the watermark area watermarked is extracted from the digital image of the area in which the watermark is embedded. In addition, the watermark is generated by inputting the authentication information obtained from the card holder authentication is determined from the correlation between the watermark and the generated watermark is extracted.