Method for extracting vein characteristics of finger vein identification system

Abstract

The invention discloses a method for extracting image vein characteristics of a finger vein identification system, which converts the extraction of vein characteristics into the problem of detecting a valley shaped area in an image. The method comprises the following steps: using any one pixel point in a vein image as a seed to start growing, wherein a growing point performs growth of pixels one by one along each direction of the pixels; if the growing point is judged as a pixel point on the vein, growing continuously in the direction, otherwise, growing the growing point in other direction of a seed point; selecting points at each different position from the image randomly as the seed points to start growing; and finally, recording the total times of each tracked pixel point in a corresponding position in a track matrix, wherein the matrix has the same size as the image, so that the finger vein characteristics are obtained by selecting a threshold value to divide the track matrix. The method can accurately extract the vein characteristics in the image and reduce the extraction of error characteristics and the missing of real characteristics, and can improve the identification accuracy of the whole system and improve the speed of processing the image at the same time.

Description

technical field [0001] The invention belongs to the technical field of human body biometric authentication, relates to the extraction of biological features, in particular to a method for extracting vein features of finger vein images. Background technique [0002] In modern society, with the rapid development of computer and network technology, information security has shown unprecedented importance. Identity verification is a necessary prerequisite to ensure system security, and accurate identity verification is required in application fields such as finance, national security, justice, e-commerce, and e-government affairs. For example, whether a person has the right to enter a secure area (safety system), whether he has the right to conduct a specific transaction, whether he is a resident of the country, and for security, set a password or key separately on the company's computer network and the Internet for protection, etc. At present, personal identity verification mai...

AI Technical Summary

Problems solved by technology

However, fingerprint identification also has its own shortcomings: some people or groups have few fingerprint features and cannot meet the requirements for filing; some users cannot use fingerprint authentication due to fingerprint wear; Leave the user's fingerprints, which may be copied and used

However, there are few existing finger vein feature extraction methods, and the feature extraction of some low-quality vein images is not accurate enough.

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