Invention Grant
US07769206B2 Finger/palm print image processing system and finger/palm print image processing method
有权
手指/掌纹图像处理系统和手指/掌纹图像处理方法
- Patent Title: Finger/palm print image processing system and finger/palm print image processing method
- Patent Title (中): 手指/掌纹图像处理系统和手指/掌纹图像处理方法
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Application No.: US10591427Application Date: 2005-01-28
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Publication No.: US07769206B2Publication Date: 2010-08-03
- Inventor: Akira Monden
- Applicant: Akira Monden
- Applicant Address: JP
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP
- Agency: Ostrolenk Faber LLP
- Priority: JP2004-061292 20040304
- International Application: PCT/JP2005/001236 WO 20050128
- International Announcement: WO2005/086091 WO 20050915
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06K9/46 ; G06K9/40

Abstract:
A finger/palm print image processing system includes a frequency component analysis unit (11) and a frequency component judgment unit (12). The frequency component analysis unit (11) performs a frequency analysis for each of the small regions into which the finger/palm print image is divided and acquires frequency components representing the respective small regions. According to frequency component, the frequency component judgment unit (12) judges the clarity of the small region corresponding to the frequency component. The finger/palm print image indicates at least one of the finger print and the palm print. The Fourier transform is used for the frequency analysis. According to the frequency component and the result of the Fourier transform of a clear two-dimensional sinusoidal wave, the frequency component judge unit (12) judges the clarity of the small region corresponding to the frequency component. Thus, even when the background has a blocky portion or the finger/palm print region has an unclear portion due to a scratch, it is possible to judge a region where a clear ridgeline exists.
Public/Granted literature
- US20070189586A1 Finger/palm print image processing system and finger/palm print image processing method Public/Granted day:2007-08-16
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