Automatic focusing type iris image acquisition method and device

Abstract

The invention relates to the technical field of image acquisition. The invention particularly relates to an automatic focusing type iris image acquisition method and device, being applied to a controller. The controller is electrically connected with a motor and a camera, wherein the camera is arranged on a carrier; and the motor is used for driving the carrier to move. The automatic focusing typeiris image acquisition method comprises the following steps: obtaining a first face image collected by the camera, taking an included angle between a principal optic axis of the camera and a horizontal plane as a first angle when the camera shoots a first face image; processing the first face image to obtain a first human eye position of the first human face image; and according to the first angle, the first human eye position and a first preset position, calculating the first deflection angle, and controlling the carrier to drive the camera to rotate by the first deflection angle, and finally controlling the iris image shot by the camera. According to the automatic focusing type iris image acquisition method, the iris can be accurately shot at the shooting position through one camera, and the convenience and cost performance of iris image acquisition are improved.

Description

technical field [0001] The invention relates to the technical field of image acquisition, in particular to an auto-focus iris image acquisition method and device. Background technique [0002] Iris recognition mainly includes five key steps: image acquisition, image preprocessing, iris segmentation, iris feature extraction, and feature classification. The clarity of the iris image collected in the first step will directly affect the accuracy and speed of iris recognition. Therefore, it will become very important to quickly collect iris images with sufficient clarity within a certain period of time. In the prior art, two or more fixed-focus cameras are usually used for iris image collection. However, this method is not only cumbersome to operate, It is not convenient enough, and it also increases the cost of hardware, which is not cost-effective. Contents of the invention [0003] The object of the present invention is to provide an auto-focus iris image collection method ...

AI Technical Summary

Problems solved by technology

Therefore, it will become very important to quickly collect iris images with sufficient clarity within a certain period of time. In the prior art, two or more fixed-focus cameras are usually used for iris image collection. However, this method is not only cumbersome to operate, Not convenient enough, but also increases the cost of hardware, the cost performance is not high

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