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Pupil positioning method and equipment

A pupil positioning and pupil technology, applied in the field of pupil positioning technology, can solve the problems of slow recognition speed, interference of pupil positioning, unsuccessful iris recognition, etc.

Active Publication Date: 2016-06-15
徐鹤菲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Illumination conditions, wearing non-contact or contact glasses, etc. will interfere with pupil positioning, resulting in unsuccessful or slow iris recognition

Method used

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  • Pupil positioning method and equipment
  • Pupil positioning method and equipment
  • Pupil positioning method and equipment

Examples

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Embodiment Construction

[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] Generally, the iris recognition method includes five stages: image acquisition, image quality evaluation, image preprocessing, feature extraction, and comparison and recognition. Considering that when the image containing the human eye, hereinafter referred to as "eye image", is not clear, it will affect the focus reflection effect of the eye image, so the quality of the eye image is considered in the early stage of recogniti...

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Abstract

Disclosed in the invention is a pupil positioning method. The method comprises: an image including human eyes is obtained and is used as an input image; according to a preset gradient operator, edge information of the input image is extracted; a hot spot is screened out from the edge information based on a preset area ration and a preset aspect ratio; a candidate pupil light spot in the input image is determined according to gray level distribution of the hot spot and the peripheral area; orientation information of the pupil light spot is determined; according to the orientation information, a radius and a circle center coordinate of a candidate pupil corresponding to the candidate pupil light spot are calculated; a first area is selected based on the radius and circle center coordinate of the candidate pupil and whether pixel value distribution in the first area meets a gray level distribution mode is determined; and if so, the candidate pupil is determined as a real pupil. In addition, the invention also provides corresponding pupil positioning equipment.

Description

technical field [0001] The present invention relates to the fields of image processing and pattern recognition, and more specifically, relates to a pupil positioning technology. Background technique [0002] With the rapid development of computer and network technology and the improvement of people's living standards, information security has become more important than ever, and identity authentication is a necessary prerequisite to ensure information security. Traditional identity authentication methods such as certificates, passwords and other authentication methods, due to the disadvantages of being easily stolen and deciphered, can no longer fully meet the needs of modern social and economic activities and security precautions. Therefore, the technology of identity authentication through biometric identification has been extensively studied. and applications. [0003] On the other hand, compared with other biometric identification technologies such as fingerprints and f...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/18G06V40/193
Inventor 孔爱祥徐鹤菲
Owner 徐鹤菲
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