发明名称 |
Method for extracting highlevel features for fingerprint recognition |
摘要 |
<p>A method to extract automatic high level features of a gray level ridge flow image including the automatic determination of the location of the high level features including the core and delta points of a fingerprint image in the form of a gray level image, comprising the following five steps: (1).determining a ridge flow direction of each gray level pixel of a fingerprint image and assign it with a direction code; (2).finding out a block directional flow and assigning each with appropriate direction code thereof; (3).correcting block flow directions in which a detection of the flow direction is affected image an input image quality in order to be immune from noises infiltrated during the acquiring process; (4).locating the delta points which are based on a corrected block direction flow diagram to locate from zero to a few delta points; and (5).locating the core points which are based on a corrected block direction flow diagram to locate one to two core points. <IMAGE></p> |
申请公布号 |
EP0855667(A2) |
申请公布日期 |
1998.07.29 |
申请号 |
EP19980300553 |
申请日期 |
1998.01.27 |
申请人 |
AETEX BIOMETRIC CORPORATION |
发明人 |
HSIAO, PEI-YUNG;HSU, SHU-FANG |
分类号 |
G06K9/00;(IPC1-7):G06K9/46;A61B5/117 |
主分类号 |
G06K9/00 |
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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