发明名称 |
Methods for digitally noise averaging and illumination equalizing fingerprint images |
摘要 |
Methods for operating a programmable digital computer to enhance images of fingerprints represented by an array of pixel values. Methods for noise averaging, illumination equalizing, directional filtering, unhairing, curvature correcting, and scale correcting a fingerprint image are disclosed. |
申请公布号 |
US4811414(A) |
申请公布日期 |
1989.03.07 |
申请号 |
US19870020331 |
申请日期 |
1987.02.27 |
申请人 |
C.F.A. TECHNOLOGIES, INC. |
发明人 |
FISHBINE, GLENN M.;RANSOM, MARK S.;GERMANN, DANIEL E. |
分类号 |
A61B5/117;G06K9/00;G06T5/00;(IPC1-7):G06K9/00;G06K9/56 |
主分类号 |
A61B5/117 |
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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