Feature extraction method and matching method of three-dimensional digital vein

Abstract

The invention provides a three-dimensional finger vein feature extraction method, comprising the following steps: 1, acquiring two-dimensional finger vein image; 2, mapPING that two-dimensional fingervein image to a three-dimensional model to realize the construction of the three-dimensional finger model; 3, normalizING that three-dimensional finger model; 4, performing feature extraction on thenormalized three-dimensional finger model. The invention also provides a three-dimensional finger vein feature matching method. The method calculates vein texture features and middle axis geometric distance feature scores of template samples and samples to be matched, and carries out weighted fusion, and judges the fused matching scores through a threshold value, thereby completing the matching recognition of the three-dimensional finger vein. The three-dimensional finger vein feature extraction method and the matching method thereof can obtain more vein texture features, obtain better matching recognition effect, and effectively solve the problem of poor matching recognition performance caused by finger posture change, thereby improving the accuracy and effectiveness of vein matching recognition.

Description

technical field [0001] The present invention relates to the technical field of vein identification, and more particularly, to a three-dimensional finger vein feature extraction method and a matching method thereof. Background technique [0002] Biometric identification technology is a technology that uses one or more human physiological features (such as fingerprints, face, iris, veins, etc.) or behavioral features (such as gait, signature, etc.) for identity authentication. Among them, finger vein recognition technology has begun to occupy an important position in the field of identity authentication due to its unique advantages. It is a biometric recognition technology that uses the texture information of blood vessels under the finger epidermis as individual identity verification. In biometric identification, finger vein identification technology has unique application advantages and application prospects because of its high security and strong stability. At present, the...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art, and provide a three-dimensional finger vein feature extraction method and a matching method thereof, which can obtain more vein texture features, obtain better matching and recognition effects, and simultaneously It can effectively solve the problem of poor matching recognition performance caused by finger posture changes, thereby improving the accuracy and effectiveness of vein matching recognition

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