发明名称 |
Character recognition method for recognizing character in an arbitrary rotation position |
摘要 |
A character recognition method includes reading a document having characters displayed thereon and entering a document data representative of the content of the document. Image data of one of the characters from the document data is extracted. The one character has an orientation rotated by an arbitrary rotation angle from a predefined reference position for the one character. A first feature quantity of the one character is extracted from the extracted image data. The extracted feature quantity is converted into a second feature quantity of the one character in the reference position based on the arbitrary rotation angle. A dictionary which contains stored feature quantities of a plurality of characters in the reference position is interrogated so as to find a primary candidate character which has a feature quantity matching or most closely resembling the converted feature quantity.
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申请公布号 |
US5031225(A) |
申请公布日期 |
1991.07.09 |
申请号 |
US19880281728 |
申请日期 |
1988.12.09 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
TACHIKAWA, MICHIYOSHI;ISHIGAMI, MASAYUKI;ISHIZAKI, HIROYOSHI;NAKAYAMA, HIROSHI |
分类号 |
G06K9/32 |
主分类号 |
G06K9/32 |
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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