Finger vein identification method, apparatus and vein authentication terminal device

Abstract

The invention relates to a finger vein identification method, an apparatus and a vein authentication terminal device. The method includes controlling an image acquisition apparatus to rotate about a sample finger once the sampled finger entered in an identification area is detected, driving the image acquisition apparatus to sample the vein of the sampled finger to obtain a plurality of sampling images, comparing and matching the sampling images with preset sample images, and determining passing of vein identification if at least one sampling image matches with the sample images. The vein false rejection rate can be maintained even when the finger plane is not perpendicular to the image acquisition apparatus. The invention is easy to realize.

Description

technical field [0001] The invention relates to the technical field of authentication, in particular to a finger vein identification method, device and vein authentication terminal equipment. Background technique [0002] Traditional vein authentication terminal equipment, including infrared light-emitting devices and cameras (or imaging sensors), during authentication, such as figure 1 As shown, a camera vertical to the finger plane is required to ensure the accuracy of the sampling effect. However, the vein authentication terminal device is non-contact sampling, that is, the sampled finger is in a suspended state during the sampling process, so it is difficult to ensure that the finger plane is perpendicular to the camera when the camera captures the finger image, so that the sampling image and the sample There is a large difference in the image, resulting in an increase in the rejection rate of sampling and a reduction in the recognition ability of the device. [0003] ...

AI Technical Summary

Problems solved by technology

However, the vein authentication terminal device is non-contact sampling, that is, the sampled finger is in a suspended state during the sampling process, so it is difficult to ensure that the finger plane is perpendicular to the camera when the camera captures the finger image, so that the sampling image and the sample There is a large difference in the image, resulting in an increase in the rejection rate of sampling and a reduction in the recognition ability of the device

[0003] At present, the relevant method to reduce the rejection rate of vein authentication is mainly to correct the translation or tilt angle of the finger. This method mainly solves the problem of finger placement of the sampled person when the finger plane is perpendicular to the camera. When the position of the device is shifted or tilted, the purpose of improving the recognition ability of the device can be achieved by correcting the two-dimensional coordinate system or image processing, but the processing methods are relatively complicated.

Images