公开(公告)号：EP3304486A1

公开(公告)日：2018-04-11

申请号：EP16804243.0

申请日：2016-05-31

申请人： Digimarc Corporation

发明人： FILLER, Tomas ,  WEAVER, Matthew, M. ,  RODRIGUEZ, Tony, F. ,  HAAGA, Donald

IPC分类号： G06T1/00

CPC分类号： G06T1/0092 ,  G06F3/122 ,  G06F3/1243 ,  G06F3/1282 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0051 ,  G06T2201/0061 ,  G06T2201/0202 ,  G06T2201/0601 ,  H04N1/32 ,  H04N1/32256

摘要： Digital watermarking is adapted for the variable data printing. A reference signal serves as a proxy for optimizing the embedding a watermark in a host image to be printed. Using the reference signal, embedding parameters are generated, which are a function of constraints such as visual quality and robustness of the machine readable data. Adjustments needed to embed a unique payload in each printed piece are generated using the embedding parameters. These adjustments are stored in a manner that enables them to be efficiently obtained and applied within the RIP or press during operation of the press. Various other methods, system configurations and applications are also detailed.

公开(公告)号：EP1551644A1

公开(公告)日：2005-07-13

申请号：EP03779118.3

申请日：2003-10-14

申请人： Digimarc Corporation

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： B42D15/00 ,  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).