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Method, device and use for matching two-stage mixed-fingerprint characteristics

A technology of fingerprint features and matching methods, which is applied in the direction of record carriers, instruments, character and pattern recognition used by machines, and can solve the problems of FRR (high false rejection rate)

Active Publication Date: 2007-06-20
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because this method relies too much on a single matching reference point, some obvious detail point pairs are often missed when the nonlinear deformation is large, resulting in a high FRR (false rejection rate) of the system.

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  • Method, device and use for matching two-stage mixed-fingerprint characteristics
  • Method, device and use for matching two-stage mixed-fingerprint characteristics
  • Method, device and use for matching two-stage mixed-fingerprint characteristics

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Embodiment Construction

[0083] The basic idea of ​​this two-stage hybrid fingerprint feature matching method is: for a pair of given reference points in two fingerprint feature point sets, firstly use the adaptive bounding box detail feature matching method to match the detail point sets of the two fingerprints, and then Record its matching score, and use the size of the matching score as the basis for whether the match is successful or whether to proceed with triangular matching.

[0084] If the matching score obtained in the detailed feature matching stage is higher than a higher threshold T 1 , it is considered that the input minutiae point set and the template minutiae point set come from the same finger, thus successfully ending the matching process; if the matching score is between a lower threshold T 2 and a higher threshold T 1 Between, use the triangular matching process to further find other possible matching detail point pairs, and recalculate the matching score. If the recalculated matc...

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PUM

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Abstract

A method for matching fingerprint character by two-stage mixture means includes integrating detail character matching manner with triangle matching manner organically, using result outputted by detail character matching manner as reference and using said reference as standard to carry out triangle matching detection on unmatched detail point in order to greatly raise accuracy of system identification and robustness of system under nonlinear deformation condition at certain prerequisite.

Description

technical field [0001] The present invention relates to a fingerprint feature matching method, in particular to a two-stage mixed fingerprint feature matching method that organically combines the minutiae feature matching method and the triangle matching method, and utilizes local minutiae feature information of a fingerprint image to quickly obtain a matching result. The invention relates to a matching device for realizing the two-stage hybrid fingerprint feature matching method and a smart card using the fingerprint feature matching device for fingerprint feature matching, and belongs to the field of pattern recognition and smart card technology. Background technique [0002] As an effective means to solve the identification problem, the smart card deserves special attention for its own security. At present, smart card technology has developed to the stage of using biometrics for identification. The biometric technology mentioned here refers to the technology of collectin...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K19/07G07F7/00
Inventor 汪雪林刘军波
Owner BEIJING WATCH DATA SYST