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Information fusion technology-based fingerprint identification method and device

A technology of fingerprint recognition and technology, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as inability to distinguish the size of subsets, combination rules that cannot handle conflicts, and obstacles to the widespread application of D-S evidence theory

Inactive Publication Date: 2011-01-26
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0012] (2) It is easy to cause a sharp increase in the number of focal elements, and the calculation amount increases exponentially, which is one of the difficulties in the practical application of D-S evidence theory;
[0013] (3) Combination rules cannot handle conflicts, and cannot distinguish the size of the subset of evidence to achieve focus according to different weights
[0015] The second aspect is the main reason that hinders the wider application of D-S evidence theory in the field of information fusion
[0023] To sum up, relying on the existing improved D-S evidence theory for fingerprint identification based on information fusion technology still has various problems in terms of accuracy and reliability. its improvement

Method used

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  • Information fusion technology-based fingerprint identification method and device
  • Information fusion technology-based fingerprint identification method and device
  • Information fusion technology-based fingerprint identification method and device

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Embodiment Construction

[0100] An information fusion technology proposed by the embodiment of the present invention uses two different fingerprint matching algorithms for fingerprint recognition, and the schematic diagram of the fingerprint recognition stage is as follows image 3 As shown: in the feature extraction stage, two types of fingerprint features are extracted, which are respectively called the first type of fingerprint feature and the second type of fingerprint feature; in the fingerprint feature matching stage, the fingerprint feature matching algorithm A 301 processes the first type of fingerprint feature, The matching algorithm B 302 processes the second type of fingerprint features, and the processing results of the two are screened by the information screening module 303 in the fusion stage of the decision-making layer to select useful information, and then processed by the improved D_S evidence theory 304 proposed by the present invention , finally get the recognition result 306.

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Abstract

The invention provides an information fusion technology-based fingerprint identification method, which comprises the following steps of: A, for the same on-site fingerprint image, extracting N types of different fingerprint characteristics, wherein N is a natural number more than or equal to 2; B, adopting N fingerprint characteristic matching algorithms, and matching the on-site fingerprint image and library fingerprint images to obtain N matching fraction sequences; and C, performing information fusion on the N matching fraction sequences by adopting the improved D_S evidence theory to obtain a fingerprint identification result. The invention also provides an information fusion technology-based fingerprint identification device. The method and the device can further improve the accuracyand reliability of fingerprint identification compared with the prior art.

Description

technical field [0001] The present invention relates to the technical field of pattern recognition and information processing, in particular to fingerprint recognition technology, in particular to a fingerprint recognition method and device based on information fusion technology. Background technique [0002] With the development of computer image processing and pattern recognition technology, biometric technology is getting more and more attention and application. Due to the advantages of uniqueness, stability, easy sampling and high reliability of biometric features such as fingerprints, iris, palmprints, faces, and voiceprints, they have become one of the most effective means of personal identity authentication. Among them, fingerprint recognition technology It is also a hotspot of biometric technology, with high practicability and feasibility, and its identification results have legal effect. [0003] figure 1 Shown are the basic steps involved in the fingerprint recog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 景晓军李剑峰张洁刘馨靖张博
Owner BEIJING UNIV OF POSTS & TELECOMM
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