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1.发明公开AUTHENTICATING PRINTED OBJECTS USING DIGITAL WATERMARKS ASSOCIATED WITH MULTIDIMENSIONAL QUALITY METRICS 有权采用数字水象星座的认证打印对象的多维质量度量分配
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
发明人： ZELLER, Claude , MACKAY, Donald, G. , KILMARTIN, William , CORDERY, Robert, A. , BROSSEAU, William, A. , BRUNK, Hugh, L. , DECKER, Stephen, K. , TIAN, Jun
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.
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2.发明授权AUTHENTICATING PRINTED OBJECTS USING DIGITAL WATERMARKS ASSOCIATED WITH MULTIDIMENSIONAL QUALITY METRICS 有权采用数字水象星座的认证打印对象的多维质量度量分配
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
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.
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3.发明公开TRANSMARKING, WATERMARK EMBEDDING FUNCTIONS AS RENDERING COMMANDS, AND FEATURE-BASED WATERMARKING OF MULTIMEDIA SIGNALS 审中-公开TRANS MARK水印嵌入特征回放命令和多媒体信号特征的水性标记的制造
公开(公告)号：EP1266475A1
公开(公告)日：2002-12-18
申请号：EP01920399.1
申请日：2001-03-16
申请人： Digimarc Corporation
IPC分类号： H04K1/00
CPC分类号： G06T1/0064 , G06T1/0028 , H04N1/32144 , H04N1/32229 , H04N1/32299 , H04N2201/3233 , H04N2201/327
摘要： A watermarked media signal (20) is transmarked to adapt the watermark to the robustness and perceptibility constraints of the new environment (34). A first watermark is detected (22) in the media signal and the message information from the first watermark is embedded into a second watermark (44), before the media signal undergoes a transformation process. The second watermark (44) is adapted to survive the transformation process. In addition, a watermark embedding command is included in a set of rendering commands used during the process of creating a media object to specify how the media object is to be rendered. The watermark embedding command includes an identifier used to link to customer or related content information, the customer's web site, the intensity at which to embed the watermark, areas not to embed, batch processing options, printing preferences for images, watermark embedding methods to use on different media types, formats or different parts of the media object, and desired rendering quality.
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