发明名称 |
A method of nonlinear filtering of degraded document images |
摘要 |
<p>A method identifies and models the distortion in a document using a two-dimensional nonlinear filter. The two-dimensional nonlinear filter is then used to improve the performance of optical character recognition systems in recognizing characters in documents that have been degraded, as for example by repeated photocopy reproductions or by fax transmission. <MATH></p> |
申请公布号 |
EP0694875(A2) |
申请公布日期 |
1996.01.31 |
申请号 |
EP19950305023 |
申请日期 |
1995.07.19 |
申请人 |
AT&T CORP. |
发明人 |
AGAZZI, OSCAR ERNESTO;CHURCH, KENNETH WARD |
分类号 |
G06K9/62;G06K9/34;G06K9/36;G06T5/20;(IPC1-7):G06T5/20 |
主分类号 |
G06K9/62 |
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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