公开(公告)号：EP1551644A4

公开(公告)日：2008-01-02

申请号：EP03779118

申请日：2003-10-14

申请人： DIGIMARC CORP

发明人： BRUNDAGE TRENT J ,  SHER-JAN MAHMOOD ,  WEAVER MATTHEW M ,  HANNIGAN BRETT T ,  BRADLEY BRETT ALAN ,  STACH JOHN ,  PERRY BURT W ,  DURST ROBERT T

IPC分类号： B42D15/10 ,  G06T1/00 ,  G07D7/12 ,  G07F7/08 ,  G07F7/12 ,  H04N1/32 ,  B42D15/00 ,  G07D7/20 ,  G09C1/00 ,  H04L9/00

CPC分类号： B42D25/20 ,  B42D25/00 ,  B42D25/23 ,  B42D25/309 ,  B42D25/333 ,  B42D25/47 ,  B42D2035/34 ,  G06Q20/347 ,  G06Q20/401 ,  G06T1/0028 ,  G06T1/0071 ,  G06T2201/0051 ,  G07D7/0034 ,  G07F7/08 ,  G07F7/086 ,  G07F7/12 ,  G09C5/00 ,  H04K1/00 ,  H04L9/3231 ,  H04L2209/56 ,  H04L2209/608 ,  H04L2209/805 ,  H04N1/32144 ,  H04N1/32288 ,  H04N1/32304 ,  H04N1/32352 ,  H04N2201/3205 ,  H04N2201/3233 ,  H04N2201/3235 ,  H04N2201/327

摘要： The present invention provides methods and systems for authenticating identification documents (100). We also teach an identification document (100) including two or more digital watermarks (27, 60). The watermarks correspond with each other or with indicia carried by the identification document (100). The correspondence can be verified to determine authenticity. We also provide digital watermark detection methods and systems to identify the different watermarks (100) through embedded orientation components. We then focus watermark message-decoding efforts on areas identified as likely including watermark orientation components (27, 60). In one implementation we provide a watermark detection trigger to identify so-called legacy documents. The trigger may indicate the presence or expected absence of a digital watermark. In other implementations we provide a versatile document authenticator to toggle between watermarking and non-watermarking authentication processes depending on a detection trigger (100).

摘要翻译： 本公开一般涉及身份证件及相关方法和装置。 一个声明提出了一种通过数字水印或通过替代过程来确定是否验证身份证件的方法。 该方法包括：接收与检测触发相对应的识别文档携带的数据; 如果接收到的数据指示预期存在的数字水印，则尝试通过分析识别文档携带的数字水印来认证识别文档; 并且如果接收到的数据指示预期不存在数字水印，则尝试通过替代过程认证身份证件。 也提供其他索赔和组合。