发明名称 |
DOCUMENT MATCHING AND ANNOTATION LIFTING |
摘要 |
A method for matching an original document image with a copy image is disclosed. The original document image is defined as an ensemble of blocks, each of the blocks having neighboring blocks. A mask is formed for each of the blocks by dilating foreground pixels included in the block. A best match is searched i n the copy image, for each of the blocks, using a search window, by correlating pixels in the mask with pixels in a corresponding portion in the copy image. Each of t he best matches has a matching score. Each of the blocks is indicated as "unmatched" when the corresponding matching score is less than a matching threshold. A displacement vector is computed for each of the matched blocks. |
申请公布号 |
CA2401065(A1) |
申请公布日期 |
2003.03.10 |
申请号 |
CA20022401065 |
申请日期 |
2002.09.03 |
申请人 |
XEROX CORPORATION |
发明人 |
BERN, MARSHALL W.;YE, MING;GOLDBERG, DAVID |
分类号 |
G06K9/34;G06K9/64;G06T5/50;G06T7/00 |
主分类号 |
G06K9/34 |
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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