公开(公告)号：EP1485863A2

公开(公告)日：2004-12-15

申请号：EP03709137.8

申请日：2003-02-14

申请人： Digimarc Corporation ,  Pitney Bowes Inc.

发明人： ZELLER, Claude ,  MACKAY, Donald, G. ,  KILMARTIN, William ,  CORDERY, Robert, A. ,  BROSSEAU, William, A. ,  BRUNK, Hugh, L. ,  DECKER, Stephen, K. ,  TIAN, Jun

IPC分类号： G06K9/00 ,  B41J2/21

CPC分类号： G06T1/0078 ,  G06T2201/0202

摘要： The disclosure describes an authentication system and related methods for authenticating printed objects. The system uses an information-based metric along with one or more print quality metrics to provide accurate detection or classification of a counterfeit printed object. The print quality metric evaluates attributes of a subject image associated with the original printer, ink or paper to detect degradation of those operations due to copying operations like an image scanning and halftone printing subsequent to the original printing of the object. The information-based metric measures message symbol errors in an optically readable code, such as a digital watermark.

公开(公告)号：EP1467867B1

公开(公告)日：2012-04-18

申请号：EP02797361.9

申请日：2002-12-16

申请人： Pitney Bowes Inc.

发明人： MACKAY, Donald, G. ,  ZELLER, Claude ,  CORDERY, Robert, A.

IPC分类号： B41J25/00 ,  H04N1/00

CPC分类号： B41J25/001 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00015 ,  H04N1/00037 ,  H04N1/00047 ,  H04N1/00058 ,  H04N1/00076 ,  H04N1/0414 ,  H04N1/0437 ,  H04N1/0455 ,  H04N1/1911

摘要： The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia and later checked to determine if the image or document or the postal indicia has the correct resolution. The foregoing is accomplished by specifying that the image on the substrate (14) will be printed with n plus m dots per inch; rotating an ink jet head (11) having n nozzles per inch about an axis (13) parallel to a substrate by an angle theta so that the ink jet head will produce an image on the substrate having (n/cos theta) dots per inch; storing in a data center that the specified image will be printed with (n/cos theta) dots per inch; analyzing the image to determine if the image has (n/cos theta) dots per inch; and comparing the number of dots per inch in the analyzed image with the number of dots per inch stored for the specified image to determine if they have the same number of dots per inch.

公开(公告)号：EP1467869A1

公开(公告)日：2004-10-20

申请号：EP02797337.9

申请日：2002-12-16

申请人： PITNEY BOWES INC.

发明人： MACKAY, Donald, G. ,  ZELLER, Claude ,  CORDERY, Robert, A. ,  BRUNK, Hugh, L.

IPC分类号： B41J2/165 ,  B41J2/01 ,  G03G15/00

CPC分类号： B41J29/393 ,  G07B17/00508 ,  G07B2017/00637

摘要： A method for assigning unique printer resolutions or signatures, i.e., a unique number of dots per inch, to a class, or models of printers or lines of postage meter (37). The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia (33) and later checked to determine if the image on document or the postal indicia (40) has the correct resolution. The foregoing would be able to detect an image or postal indicia (33) that was scanned into a computer and printed with a printer that did not have the number of dots per inch specified in the image or postal indicia(40).

公开(公告)号：EP1467867A1

公开(公告)日：2004-10-20

申请号：EP02797361.9

申请日：2002-12-16

申请人： PITNEY BOWES INC.

发明人： MACKAY, Donald, G. ,  ZELLER, Claude ,  CORDERY, Robert, A.

IPC分类号： B41J2/15

CPC分类号： B41J25/001 ,  H04N1/00002 ,  H04N1/00005 ,  H04N1/00015 ,  H04N1/00037 ,  H04N1/00047 ,  H04N1/00058 ,  H04N1/00076 ,  H04N1/0414 ,  H04N1/0437 ,  H04N1/0455 ,  H04N1/1911

摘要： The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia and later checked to determine if the image or document or the postal indicia has the correct resolution. The foregoing is accomplished by specifying that the image on the substrate (14) will be printed with n plus m dots per inch; rotating an ink jet head (11) having n nozzles per inch about an axis (13) parallel to a substrate by an angle theta so that the ink jet head will produce an image on the substrate having (n/cos theta) dots per inch; storing in a data center that the specified image will be printed with (n/cos theta) dots per inch; analyzing the image to determine if the image has (n/cos theta) dots per inch; and comparing the number of dots per inch in the analyzed image with the number of dots per inch stored for the specified image to determine if they have the same number of dots per inch.

公开(公告)号：EP1467869B1

公开(公告)日：2012-05-30

申请号：EP02797337.9

申请日：2002-12-16

申请人： Pitney Bowes Inc. ,  Digimarc Corporation

发明人： MACKAY, Donald, G. ,  ZELLER, Claude ,  CORDERY, Robert, A. ,  BRUNK, Hugh, L.

IPC分类号： B41J29/393 ,  G07B17/00

CPC分类号： B41J29/393 ,  G07B17/00508 ,  G07B2017/00637

摘要： A method for assigning unique printer resolutions or signatures, i.e., a unique number of dots per inch, to a class, or models of printers or lines of postage meter (37). The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia (33) and later checked to determine if the image on document or the postal indicia (40) has the correct resolution. The foregoing would be able to detect an image or postal indicia (33) that was scanned into a computer and printed with a printer that did not have the number of dots per inch specified in the image or postal indicia(40).

公开(公告)号：EP1485863B1

公开(公告)日：2012-05-09

申请号：EP03709137.8

申请日：2003-02-14

申请人： Digimarc Corporation ,  Pitney Bowes Inc.

发明人： ZELLER, Claude ,  MACKAY, Donald, G. ,  KILMARTIN, William ,  CORDERY, Robert, A. ,  BROSSEAU, William, A. ,  BRUNK, Hugh, L. ,  DECKER, Stephen, K. ,  TIAN, Jun

IPC分类号： G06T1/00

CPC分类号： G06T1/0078 ,  G06T2201/0202

摘要： The disclosure describes an authentication system and related methods for authenticating printed objects. The system uses an information-based metric along with one or more print quality metrics to provide accurate detection or classification of a counterfeit printed object. The print quality metric evaluates attributes of a subject image associated with the original printer, ink or paper to detect degradation of those operations due to copying operations like an image scanning and halftone printing subsequent to the original printing of the object. The information-based metric measures message symbol errors in an optically readable code, such as a digital watermark.