公开(公告)号：EP2812849A4

公开(公告)日：2016-01-06

申请号：EP12867861

申请日：2012-02-09

申请人： HEWLETT PACKARD DEVELOPMENT CO

发明人： POLLARD STEPHEN ,  ULICHNEY ROBERT A ,  GAUBATZ MATTHEW D ,  SIMSKE STEVEN J

IPC分类号： G06K9/46 ,  H04N1/32 ,  H04N1/405

CPC分类号： G06K9/00442 ,  G06T2207/30144 ,  H04N1/32144 ,  H04N1/405 ,  H04N2201/323 ,  H04N2201/3235

摘要： A forensic verification system (900) extracts a print signature via a print signature extractor (910) from a captured image of a printed halftone. The system (900) utilizes a comparator (920) to compare the print signature to a reference signature stored in a registry to determine differences between the print signature and the reference signature. The system (900) utilizes a forensic analyzer (930) to perform a forensic analysis on the signatures based on the comparison to authenticate the printed halftone.

公开(公告)号：EP2812848A4

公开(公告)日：2015-08-05

申请号：EP12867778

申请日：2012-02-09

申请人： HEWLETT PACKARD DEVELOPMENT CO

发明人： ULICHNEY ROBERT A ,  POLLARD STEPHEN ,  GAUBATZ MATTHEW D ,  SIMSKE STEVEN J

IPC分类号： G06K9/46 ,  G06K9/00 ,  G06K15/02

CPC分类号： G06K9/00496 ,  G06K9/46 ,  G06K15/1881 ,  H04N1/32144 ,  H04N1/32256 ,  H04N1/405 ,  H04N2201/3235

摘要： A forensic verification system (1100) extracts a print signature via a print signature extractor (1110) from an interior of a halftone contained in an image. The system (1100) utilizes a comparator (1120) to compare the print signature to a reference signature stored in a registry to determine differences between the print signature and the reference signature. The system (1100) utilizes a forensic analyzer (1130) to perform a forensic analysis on the signatures based on the comparison to authenticate the image.