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1. 发明授权

US07787152B2 Copy detection system using correlations of copy detection patterns 有权
标题翻译：复制检测系统使用复制检测模式的相关性
公开(公告)号：US07787152B2
公开(公告)日：2010-08-31
申请号：US11240889
申请日：2005-09-30
申请人： Bertrand Haas , Claude Zeller , Zhijie Xu
发明人： Bertrand Haas , Claude Zeller , Zhijie Xu
IPC分类号： G06K9/00
CPC分类号： G06T1/0064 , G06T1/0078 , G06T2201/0065 , G06T2201/0081 , H04N1/00002 , H04N1/0005 , H04N1/32
摘要： Systems and methods for detecting copies of documents are described. In one example, a system and method for detecting copies of documents utilizes multiple correlations of original and scanned copy detection patterns. The system captures a CDP that may be skewed or improperly sized. The system also retrieves or reconstitutes the expected CDP. In order to provide a more reliable comparison and without manipulating the captured CDP, the system manipulates the orientation or rotation and resolution or size of the retrieved or reconstituted CDP to register it with the captured CDP. Then the system performs a first correlation to determine if the captured CDP indicates the correct document identification and then if necessary, a second correlation to determine authentication such as by performing a 1 pixel shift multiple autocorrelation comparison of the two CDPs.
摘要翻译：描述用于检测文档副本的系统和方法。在一个示例中，用于检测文档副本的系统和方法利用原始和扫描的复制检测模式的多个相关性。该系统捕获可能倾斜或尺寸不正确的CDP。该系统还检索或重建预期的CDP。为了提供更可靠的比较并且不操纵所捕获的CDP，系统操纵检索或重构的CDP的取向或旋转和分辨率或大小，以将其与所捕获的CDP进行注册。然后，系统执行第一相关以确定所捕获的CDP是否指示正确的文档标识，然后如果需要的话，进行第二相关以确定认证，例如通过执行两个CDP的1像素移位多个自相关比较。

2. 发明申请

US20070076239A1 Copy detection system using correlations of copy detection patterns 有权
标题翻译：复制检测系统使用复制检测模式的相关性
公开(公告)号：US20070076239A1
公开(公告)日：2007-04-05
申请号：US11240889
申请日：2005-09-30
申请人： Bertrand Haas , Claude Zeller , Zhijie Xu
发明人： Bertrand Haas , Claude Zeller , Zhijie Xu
IPC分类号： G06K15/00
CPC分类号： G06T1/0064 , G06T1/0078 , G06T2201/0065 , G06T2201/0081 , H04N1/00002 , H04N1/0005 , H04N1/32
摘要： Systems and methods for detecting copies of documents are described. In one example, a system and method for detecting copies of documents utilizes multiple correlations of original and scanned copy detection patterns. The system captures a CDP that may be skewed or improperly sized. The system also retrieves or reconstitutes the expected CDP. In order to provide a more reliable comparison and without manipulating the captured CDP, the system manipulates the orientation or rotation and resolution or size of the retrieved or reconstituted CDP to register it with the captured CDP. Then the system performs a first correlation to determine if the captured CDP indicates the correct document identification and then if necessary, a second correlation to determine authentication such as by performing a 1 pixel shift multiple autocorrelation comparison of the two CDPs.
摘要翻译：描述用于检测文档副本的系统和方法。在一个示例中，用于检测文档副本的系统和方法利用原始和扫描的复制检测模式的多个相关性。该系统捕获可能倾斜或尺寸不正确的CDP。该系统还检索或重建预期的CDP。为了提供更可靠的比较并且不操纵所捕获的CDP，系统操纵检索或重构的CDP的取向或旋转和分辨率或大小，以将其与所捕获的CDP进行注册。然后，系统执行第一相关以确定所捕获的CDP是否指示正确的文档标识，然后如果需要的话，进行第二相关以确定认证，例如通过执行两个CDP的1像素移位多个自相关比较。

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