Binocular vision-based finger vein three-dimensional identification method and device

Abstract

The invention discloses a binocular vision-based finger vein three-dimensional identification method and a binocular vision-based finger vein three-dimensional identification device. The device mainly comprises an infrared light source, a light touch switch, a left camera, a right camera, infrared filters, a power supply, an advanced RISC machines (ARM) interface board and a digital signal processing (DSP) plate, wherein the infrared light source, a finger and the left camera and the right camera are positioned on three horizontal planes; the left camera and the right camera are positioned on the two sides of a finger projection line respectively; and the connecting line of the left camera and the right camera is vertical to the finger projection line. The method comprises the following steps of: if that the light touch switch is pressed is detected, operating the left camera and the right camera to acquire the binocular image of the finger, and extracting and matching the three-dimensional characteristics of finger veins based on the binocular vision principle and a scale invariant feature transform (SIFT) operator so as to realize the function of registering or identifying the finger. The method and the device effectively improve the identification rate and security level of finger vein identification equipment.

Description

technical field

[0001] The invention mainly relates to a method and device for three-dimensional recognition of finger veins based on binocular vision. Background technique

[0002] Finger vein recognition is a new generation of biometric identification technology. Its technical advantages mainly include: First, vein recognition has a high security level. Veins are hidden inside the body and are not easy to be copied or damaged. Only living bodies have veins, and their characteristics are not easy to steal; Second, there are large individual differences in vein characteristics, even twins with similar appearance have differences in veins, and this difference will not disappear during their lifetime; third, non-invasive and non-contact imaging based on infrared rays is used for vein identification technology, easy to use and clean; fourth, vein recognition is applicable to a wide range of people, everyone has veins, and vein features can be extracted. Based on the above adva...

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