专利名称：Pattern matching method and apparatus发明人：Yoshiaki Nishio申请号：US09605530申请日：20000629公开号：US0661B1公开日：20031216
专利附图：
摘要：A pattern recognition matching processing method and apparatus usesexpansion processing with dictionary data as a matching candidate (pattern image).Contraction processing may be performed for the pattern image, and a differential imagebetween the expanded and contracted images can be found. A mask image is prepared
based on the differential image, and matching processing of the image containing acharacter to be recognized with the pattern image is performed with respect to pixels inan area other than the prepared mask image.
申请人：KEYENCE CORPORATION
代理机构：Smith Patent Office
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