| 摘要 |
A method for verifying the authenticity of a security document (100) by means of a camera-equipped cellphone (500) comprises steps of acquiring a transmission mode image and a reflection mode image of the security document (100). Transmitted light through a plurality of perforations (211, 212, 213) in a substrate (200) of the security document (100) is evaluated by means of the cellphone (500). Then, a relative positioning of the perforations (211, 212, 213) with respect to a printed security features is determined, and the security document (100) is considered "authentic" if the determined positions and the acquired images substantially correspond to pre-stored "templates" for the security document (100). The perforations (211, 212, 213) are structured such that they are not visible to the naked eye of a human observer which makes it harder to counterfeit the security document. |
