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Selective extension-based fingerprint image matching method

A fingerprint image and matching method technology, which is applied in image analysis, matching and classification, image data processing, etc., can solve problems such as difficulty in realization, inability to meet small fingerprint matching, and high time complexity of the algorithm

Active Publication Date: 2018-02-09
XIDIAN UNIV
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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the existing conventional algorithms cannot satisfy the matching of small fingerprints, some of the existing small fingerprint matching algorithms are difficult to implement, the algorithm has high time complexity, and the accuracy is not ideal

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  • Selective extension-based fingerprint image matching method

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Embodiment Construction

[0109] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0110] The small fingerprint image is mainly characterized by information such as minutiae points and direction fields, and the features describe the basic shape and ridge direction of the small fingerprint. The present invention uses minutiae and direction field information to match small fingerprint images, and by expanding the effect of the direction field, fingerprint blocks with minutiae and no minutiae are treated differently to achieve more comprehensive feature extraction. At the same time, relying on the fusion matching score design, the features of small fingerprint extraction can be fully applied and the accuracy...

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Abstract

The present invention belongs to the digital image processing technical field and discloses a selective extension-based fingerprint image matching method. According to the method, small fingerprint image matching is carried out by using small node and directional field information; fingerprint blocks with small nodes and fingerprint blocks without small nodes are considered differently through extending the functions of directional fields, so that feature extraction is realized; and matching scores are fused, so that the extracted features of small fingerprints can be fully applied. With the method adopted, more comprehensive feature extraction can be realized. Since the matching scores are fused, the extracted features of the small fingerprints can be fully applied, and accuracy can be improved. The method can accurately match the small nodes of fingerprints and can be used in an automatic fingerprint identification system.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, in particular to a fingerprint image matching method based on selective extension. Background technique [0002] The identity authentication methods in the current society have a tendency to develop from traditional passwords to biometric identification. The application of biometric technology in the field of identity already has a huge market size. Traditional biometric features mainly include fingerprints, palm prints, faces, veins, irises, etc. Compared with other features, fingerprints have special advantages in terms of convenience and reliability. Compared with palmprint recognition, fingerprint recognition has more concentrated information, lower storage requirements, and lower hardware requirements; compared with face recognition, fingerprints will not be affected by age changes; compared with vein recognition and iris recognition, Fingerprint recognition has lower requ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06T7/136G06T7/194
CPCG06T7/136G06T7/194G06V40/1347G06V40/1365
Inventor 庞辽军钟瑞赵恒陈炯肖凯
Owner XIDIAN UNIV
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