发明名称 |
METHOD AND SYSTEM FOR DOCUMENT COMPARISON USING CROSS PLANE COMPARISON |
摘要 |
<p>The invention relates to the field of document authentication and more specifically to an apparatus and method for validating an enhanced feature contained in a document under analysis. More specifically, a cross plane comparison is used within a document comparison system to validate the authenticity of a security document. Two images are extracted from two colour planes (e.g. visible light and infrared) of a specified page of a security document and the presence/absence of a pattern or text in each plane is determined. In operation, the security document is exposed to two light sources and grey scale images are extracted. Binary images are then obtained from the grey scale images by filtering each grey scale image and then thresholding each grey scale image. The difference between the two binary images is then calculated to determine if a pattern or text is present in both planes or only in one plane. A confidence score is determined from the difference and is presented to an operator of the document comparison system.</p> |
申请公布号 |
CA2658249(C) |
申请公布日期 |
2012.12.11 |
申请号 |
CA20072658249 |
申请日期 |
2007.06.28 |
申请人 |
CANADIAN BANK NOTE COMPANY, LIMITED |
发明人 |
VISAN, TIBERIU;O'NEIL, DAVID GILES;BROWN, GREGORY JOHN |
分类号 |
G06K9/46;G06K9/20;G06K9/40;G06K9/64;G06K9/80 |
主分类号 |
G06K9/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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