Fingerprint score fusion system and method based on Sigmoid expansion

Abstract

The invention discloses a fingerprint score fusion system and a fingerprint score fusion method based on Sigmoid expansion. The system comprises a training process and a testing process; the training process is realized via a training image preprocessing unit, a training feature extracting unit, a training feature aligning unit and a Sigmoid parameter training unit; and the testing process is realized via a testing image preprocessing unit, a testing feature extracting unit, a testing feature aligning unit and a score fusion unit. According to the score fusion unit, Sigmoid expansion is conducted on each score by using parameters output from the Sigmoid parameter training unit respectively; the scores after the Sigmoid expansion are fused; and a result after the fusion is taken as a final matching score. The final matching score is used for deciding whether the input fingerprint feature and the template fingerprint feature are originated from the same finger, thereby finishing fingerprint matching.

Description

technical field [0001] The invention belongs to the technical field of biological feature identification, and relates to frontier knowledge such as image processing, pattern recognition, computer technology, etc., and particularly relates to a fingerprint score fusion system and method based on Sigmoid expansion, which realizes fingerprint matching through fingerprint score fusion and Sigmoid expansion. Background technique [0002] Fingerprint identification technology is one of the most mature technologies researched and applied in the field of biometric identification. Due to the advantages of uniqueness and stability, convenient collection process and low cost, fingerprints have been widely used in identification, information security, access control and many other aspects. [0003] After decades of research, fingerprint recognition technology has achieved rapid development, but the performance of fingerprint recognition algorithm is far from the accuracy of theoretical ...

AI Technical Summary

Problems solved by technology

[0008] In the existing fingerprint score fusion process, different scores have different distributions and different attributes, thereby limiting the performance improvement of the fingerprint score fusion system, the main purpose of the present invention is to propose a fingerprint score fusion system based on Sigmoid extension And method, through Sigmoid extension to different scores, different scores have similar distribution and attributes, thereby improving the efficiency of score fusion and improving the performance of fingerprint score fusion system

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