Device and method for iris recognition using a plurality of iris images having different iris sizes

Abstract

The present invention relates to a device and method for iris recognition capable of improving the accuracy of iris recognition, which involve considering the reaction of pupils to the brightness of light and the resulting variations in the iris regions. The device and method are configured such that a plurality of iris images are captured and obtained using a camera and the brightness of light is adjusted from the point that the size of the iris is at a maximum up to the point that the size of the iris is at a minimum, the plurality of iris images are registered and stored, together with iris size information corresponding to each of the iris images, in a database interoperating with the iris recognition device, and an iris image for authentication, obtained for authentication or identification purposes using a camera, is compared with an iris image selected from the plurality of registered iris images, wherein the iris size of the selected iris image is most similar to that of said iris image for authentication.

Description

technical field [0001] The present invention relates to an iris recognition device and method using a plurality of iris images with different iris sizes. In order to improve the accuracy of iris recognition in consideration of pupils that react according to the brightness of light and the iris area that changes accordingly, In the iris recognition device, the brightness of the light is adjusted so that the size of the iris of the registered subject changes from the largest or near the largest size to the smallest or near the smallest size and a camera is used to capture a plurality of iris images (or called "iris snapshots (snapshot) )"), and register / save together with the iris size information of multiple iris images captured corresponding to changing the above iris size in the database linked with the iris recognition device (the iris images registered / saved are referred to as "registration" below) iris image"), combining the iris image used for authentication or identity v...

AI Technical Summary

Problems solved by technology

[0002] Conventionally, in the technology of iris recognition devices, there is no suitable method that can respond to the change of pupil size caused by the illuminance of illumination, so there is a problem that the iris recognition rate decreases due to the change of iris image with the change of pupil size. The problem

[0003] Another prior art related to the present invention is disclosed in Korean Laid-Open Patent Publication No. 10-2006-81380 filed by the applicant of the present invention, which is somewhat different from the invention in terms of technical ideas. Here, the Stereo camera as follows: By installing a stereo camera on a mobile terminal, it shoots an image suitable for recognizing the face and / or iris, calculates the distance between the camera and the face, and corrects the deviation in the size of the image due to the distance; However, this technology is different from the technical idea used to accomplish the present invention, and there are problems of an increase in the size of the device and an increase in cost due to the installation of the stereo camera.

[0004] In addition, Korean Laid-Open Patent Publication No. 10-2002-28146 discloses other prior art related to the present invention. Here, pupil radii that vary with brightness are divided into one or more classes, and multiple iris images Classified into categories corresponding to each person and registered / saved as an iris image, and compared with an iris image captured for authentication, it is similar in terms of using the radius of the iris, but it is not disclosed and taught to be used effectively The method of using the user's identity confirmation information and size information contained in the iris has limitations in improving the iris recognition rate and processing speed

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