Device and method for acquiring iris images

Abstract

The invention discloses a device and a method for acquiring iris images. The device comprises an imaging module, an illuminating module, a three-dimensional movement platform, a control module, an optical platform, fixing rods and a jaw support, wherein the jaw support is fixed onto the optical platform via the fixing rods, and the imaging module is fixed onto the three-dimensional movement platform; the illuminating module comprises light source fixing plates, a light intensity regulator and near-infrared LEDs, the near-infrared LEDs are arranged on the light source fixing plates annularly, and infrared rays emitted by the near-infrared LEDs are parallel to a primary optical axis of a CCD (charge coupled device) camera; and the three-dimensional movement platform comprises a lead screw and slider mechanism, a stepper motor and a driver. The device and the method have the advantages that a portion corresponding to an eye of a person can be photographed in the middle of an image by adjusting the device according to the location of the eye of the person, the left eye and the right eye of the person can be photographed by controlling the three-dimensional movement platform as needed when the three-dimensional movement platform moves, quick centering and focusing can be realized by an automatic centering and focusing algorithm, and the clear iris images can be photographed.

Description

technical field [0001] The invention discloses a non-feedback and contactless automatic iris image acquisition device, more specifically an iris image acquisition device and method. Background technique [0002] As an important identification feature, the iris has the advantages of non-contact, uniqueness, stability, and non-invasiveness. The identification system based on iris mainly consists of four parts: iris image acquisition, image preprocessing, iris feature extraction, matching and recognition. The acquisition of iris image is the first step of iris recognition, which is a very important link. However, since the diameter of the iris is very small, and the collected iris image must have enough pixels, the acquisition of the iris image is also a very difficult link. Because the existing iris collection device still has problems such as high price, requirements for the examinee, and manual operation, it needs to be further developed and researched. With the advanceme...

AI Technical Summary

Problems solved by technology

However, since the diameter of the iris is very small, and the collected iris image must have enough pixels, the acquisition of the iris image is also a very difficult link.

Since the existing iris collection device still has problems such as high price, requirements for the examinee, and manual operation, it needs to be further developed and researched.

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