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FINGERPRINT AUTHENTICATION SYSTEM, FINGERPRINT AUTHENTICATION METHOD, AND FINGERPRINT AUTHENTICATION PROGRAM

  • US 20130051638A1
  • Filed: 05/18/2011
  • Published: 02/28/2013
  • Est. Priority Date: 06/04/2010
  • Status: Active Grant
First Claim
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1. A fingerprint authentication system comprising:

  • an image division unit that divides a captured image of an authentication subject to be subjected to fingerprint authentication into a plurality of small regions;

    a frequency analysis unit that performs a frequency analysis on each of the small regions;

    a ridge candidate extraction unit that extracts frequency components corresponding to ridge candidates in the small regions from frequency components obtained in the frequency analysis;

    a continuous ridge candidate group generation unit that compares the ridge candidates between adjacent small regions, and when the ridge candidates satisfy a condition enabling the ridge candidates to be determined continuous, generates a continuous ridge candidate group including the ridge candidates; and

    a determination unit that determines that an abnormality exists in the image when overlap exists between the image regions corresponding to the continuous ridge candidate group.

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