Optical device for simultaneously acquiring human face image and iris image and identity authentication method thereof

Abstract

The invention discloses an optical device for simultaneously acquiring a human face image and an iris image and an identity authentication method thereof. The device comprises a human face image acquisition module and an iris image acquisition module; the human face image acquisition module is composed of a pre-positioned imaging lens group, a beam splitter prism, a human face camera, an image processing unit and an illumination light source; the iris image acquisition module is composed of the pre-positioned imaging lens group, a beam splitter prism, an iris camera, the image processing unit and the illumination light source; the human face image acquisition module and the iris image acquisition module share the pre-positioned imaging lens group, the image processing unit and the illumination light source; and the separation of a light path of the human face image acquisition module and a light path of the iris image acquisition module is realized by the beam splitter prisms. According to the optical device, the human face image and the iris image of a user can be simultaneously and clearly acquired, and the acquired human face image and iris image have a specific positioning relation, so that subsequence image processing, and extraction of human face features and iris features can be conveniently realized, and the safety is higher.

Description

technical field [0001] The invention belongs to the technical field of biological feature recognition, and in particular relates to an optical device for simultaneously collecting a face image and an iris image and an identity authentication method thereof. Background technique [0002] With the continuous improvement of people's security level in important places, the access control system based on single human biometric identification can no longer meet the requirements. For this reason, it is necessary to develop an access control system based on two or more biometric identifications of the human body to further improve the security level of the access control system. Face and iris are two important biological characteristics of the human body, which can be used for identity authentication. In order to improve the security protection level of the access control system, these two biometric identification technologies can be used together in an access control system to rea...

AI Technical Summary

Problems solved by technology

[0003] At present, single-function face image capture devices and single-function iris image capture devices have appeared on the market, but there is no optical device that can clearly capture face images and iris images at the same time

According to statistics, the size of human face is generally 110mm×200mm, while the average diameter of human iris is φ12mm, that is, the size of human face is 9-17 times that of iris. The optical device captures face images and iris images clearly at the same time

If the iris image is collected by the face image collection optical device, the iris image is too small to distinguish the details

On the contrary, if the iris image acquisition device is used to collect the face image, a complete face image cannot be obtained.

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