发明名称 |
Gerät und Verfahren zum Extrahieren von Mustern |
摘要 |
<p>In a projection means black pixel histograms of a binary stationary image are generated in both the vertical and the horizontal direction. In a text type judgment means, in accordance with these histograms, a determination is made of whether the image is vertical text or horizontal text. Based on the result of this determination, a pattern block extraction means extracts either a column or a row from the image. The block is further projected and divided into smaller blocks. Then projection is again applied to these divided blocks and patterns are extracted by a pattern extraction means. A judgment is made as to whether or not joining of the extracted patterns is to be performed and, if joining is required, they are joined by a pattern joining means and finally the offsets of all the extracted patterns are calculated, whereupon data (of extracted patterns) are sent to a pattern matching process. <IMAGE></p> |
申请公布号 |
DE69721941(D1) |
申请公布日期 |
2003.06.18 |
申请号 |
DE1997621941 |
申请日期 |
1997.11.12 |
申请人 |
NEC CORP., TOKIO/TOKYO |
发明人 |
HIRAO, KOUICHIROU;YAMADA, KEJI;HONGU, TAKAHIRO;MOCHIZUKI, TAKASHI;ARAI, MITSUTOSHI |
分类号 |
G06K9/20;G06K9/32;G06T1/00;H04N1/40;(IPC1-7):G06K9/20 |
主分类号 |
G06K9/20 |
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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