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Fingerprint matching method and device thereof

A matching method and fingerprint technology, which is applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of high complexity and time-consuming matching of large-capacity fingerprints, and achieve the effect of reducing fingerprint matching time and narrowing the scope

Active Publication Date: 2014-02-05
CHINA UNITED NETWORK COMM GRP CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The present invention provides a fingerprint matching method and device, which are used to solve the problems of high complexity and time-consuming large-capacity fingerprint matching in the prior art

Method used

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  • Fingerprint matching method and device thereof
  • Fingerprint matching method and device thereof
  • Fingerprint matching method and device thereof

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Embodiment Construction

[0035] 100. Rotate the on-site fingerprints successively around the center point of the on-site fingerprints according to preset angles to obtain multiple on-site rotated fingerprints.

[0036] In this embodiment, the on-site rotation fingerprint includes the initial on-site fingerprint and each on-site rotation fingerprint after the on-site fingerprint is rotated, and the collected on-site fingerprint is rotated according to a preset angle to obtain multiple on-site rotation fingerprints.

[0037] Specifically, the above-mentioned on-site fingerprints are rotated successively according to preset angles to obtain multiple on-site rotated fingerprints, including: rotating the on-site fingerprints clockwise and counterclockwise respectively according to preset angles Y times sequentially to obtain 2*Y +1 for live spin fingerprints.

[0038] Usually, when rotating the on-site fingerprint, the preset rotation angle can be determined according to the range of the direction differen...

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Abstract

The invention provides a fingerprint matching method and a device thereof. Through voting a coordinate difference between each detailed point in a field rotation fingerprint and the detailed point of each stamped fingerprint in a fingerprint database respectively, the coordinate difference between the field rotation fingerprint and the stamped fingerprint is determined. The field rotation fingerprint is subjected to coordinate translation, and the field rotation fingerprint which is subjected to coordinate translation is matched with the stamped fingerprint. The detailed point in the matched field rotation fingerprint and the detailed point in the corresponding stamped fingerprint are subjected to second matching vote. According to the matching degree between each stamped fingerprint and the field fingerprint, the stamped fingerprint which is in coarse matching with the field fingerprint is determined from a large number of fingerprint databases according to the matching degree of each stamped fingerprint and the field fingerprint. According to the method, the position information of each detailed point is used to carry out matching voting between detailed points, simple operation and voting methods are used to eliminate an unmatched stamped fingerprint in the large capacity fingerprint database, the accurate matching range of a fingerprint is reduced, and thus the total fingerprint matching time is greatly reduced.

Description

technical field [0001] The invention relates to the field of fingerprint identification, in particular to a fingerprint matching method and device. Background technique [0002] Automatic fingerprint identification includes image processing, feature extraction, fingerprint matching and other parts. Among them, fingerprint matching can generally be divided into two categories: image-based matching and feature structure-based matching. Image-based matching takes the gray information or direction information of the entire image as matching features, and uses cross-correlation and / or variance sum methods to calculate the gray correlation between two images; feature structure-based matching uses the richness of the fingerprint image. Information matching, the most widely used is the minutiae feature. [0003] At present, the commonly used fingerprint matching methods based on minutiae features mostly use information such as the position, direction, type, and density of minutiae...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 周翾姜琳李田英张成岩
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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