| 摘要 |
To alert parties to an alteration to a bar code ( 20 ) or a corresponding digital image ( 18 ), for example a digital photograph which the bar code ( 20 ) partially overlaps, the bar code ( 20 ) includes information about the digital image ( 18 ). The bar code ( 20 ) partially overlaps and is integrated into the image ( 18 ). The bar code ( 20 ) and the part thereof in the image ( 18 ) are compared for required identity. By providing such an alert, the present invention makes it very difficult to alter, for example, an identification card, an use it for unauthorized purposes. |
