Fingerprint characteristic quickly matching method, device and application

A technology of fingerprint features and matching methods, which is applied in the directions of instruments, character and pattern recognition, computer parts, etc., and can solve the problems of rare fingerprint matching algorithms

CN100492395CInactive Publication Date: 2009-05-27BEIJING WATCH DATA SYST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2009-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

A quick matching method of fingerprint utilizes global character information and local detailed character information of fingerprint to accurately and conveniently as well as quickly judge out whether two fingerprints are matched to each other or not. The device and intelligent card for realizing said method are also disclosed.
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Description

technical field

[0001] The present invention relates to a method for realizing fast matching of fingerprint features by using the global feature information of the fingerprint (that is, the central point of the fingerprint image) and the local detailed feature information (that is, the bifurcation point and the endpoint of the fingerprint ridge line), and also relates to a method for realizing the fingerprint feature. The device of the fingerprint feature fast matching method also relates to a smart card (smartcard) using the fingerprint feature fast matching device for fingerprint feature matching, which belongs to the field of pattern recognition and smart card technology. Background technique

[0002] Smart card technology is recognized as an effective technical means for enterprises and governments to solve identity and security problems.

[0003] At present, smart card technology has developed to the stage of using biometrics for identification. In with the public key ...

Examples

Embodiment Construction

[0072] For ease of understanding, the following first focuses on the specific implementation and implementation device of the fingerprint feature fast matching method provided by the present invention, and then specifically introduces the application of this method in smart cards.

[0073] This fast fingerprint feature matching method mainly includes the following technical contents: fingerprint image center point detection, fingerprint image registration, rough matching of details based on local structural information, precise matching of details based on global structural information, and feature matching based on singular point information. Matches and match score calculations. Let's introduce them one by one.

[0074] 1. Fingerprint image center point detection

[0075] The calculation of the center point is based on the direction field. In order to obtain the direction field of the fingerprint image accurately, the following steps are adopted:

[0076] 1) Divide the inp...