Identity recognition device and method based finger veins

Abstract

The invention discloses an identify recognition device and method based finger veins, and the device comprises a main camera, a slave camera, an image processing unit, an identity authentication unit, a storage unit, a touch key, a glass filter, and an ultraviolet surface light source, wherein the main and slave cameras are used for respectively transmitting obtained main and slave finger vein images to the image processing unit. The image processing unit is used for extracting three-dimensional characteristic information of finger veins from the main and slave finger vein image signals, and carrying out normalizing, thereby obtaining the reference characteristic information of the finger veins. The identity authentication unit is used for comparing the obtained reference characteristic information of to-be-recognized finger veins with characteristic template information, and completing the identity recognition and authentication of the finger veins. Through the extraction and normalization of the three-dimensional characteristic information of the finger veins, the device and method effectively solve a problem of wrong recognition caused by the change of a finger posture, and remarkably improve the recognition accuracy and safety level.

Description

Technical field [0001] The invention relates to the field of biometric identification and three-dimensional image reconstruction, and in particular to a method and device for identification based on finger veins. Background technique [0002] Biometric identification is a technology that uses computer technology to use the inherent physiological or behavioral characteristics of the human body to perform identity authentication. With the rapid development of information technology, information security has shown unprecedented importance, and identification is a necessary prerequisite to ensure system security. Finger vein recognition technology uses near-infrared rays to penetrate the vein pattern image of the finger to perform identity recognition. It is a new high-precision and high-speed authentication technology in the world. Finger vein recognition technology uses living body and body internal characteristics for authentication. It has the characteristics of high security le...

AI Technical Summary

Problems solved by technology

[0003] Among the existing methods based on finger vein identification, such as Hitachi's finger vein authentication system, Fujitsu's palm vein authentication system, and Chinese patents CN101380225A, CN1586395A, etc. Proposed methods and devices based on finger vein characteristics for identification, Both are processed and identified for the two-dimensional image of finger vein collected by a single camera. Since the finger vein exists inside the finger and has complex three-dimensional network structure characteristics, the two-dimensional finger vein image loses other perspective information, and the same finger every time When collecting images, there are often finger posture changes such as displacement and rotation, resulting in large differences in the images collected each time and low recognition accuracy; patent CN101980243A discloses a three-dimensional recognition method and device for finger veins based on binocular vision. To a certain extent, the above defects are solved, but because the two cameras are arranged horizontally and symmetrically, perpendicular to the direction of the finger, some useful vein features will still be lost, and the correction effect on the vein pattern deformation caused by finger stretching, pitching and other postures is not obvious. , resulting in some feature recognition errors

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