一种新的虹膜定位算法

上海大学学报(自然科学版)

一种新的虹膜定位算法

陈颖1,2，陆亨立1

1.上海大学通信与信息工程学院，上海 200072； 2.上海应用技术学院计算机科学与信息工程系，上海 200233

收稿日期:2006-05-31 修回日期:1900-01-01 出版日期:2007-04-30 发布日期:2007-04-30
通讯作者: 陈颖

A New Algorithm for Locating Iris

CHEN Ying1,2,LU Heng-li1

1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China;2. Computer Science and Information Engineering Department, Shanghai Institute of Technology, Shanghai 200233, China

Received:2006-05-31 Revised:1900-01-01 Online:2007-04-30 Published:2007-04-30
Contact: CHEN Ying

摘要/Abstract

摘要： 提出一种新的虹膜定位算法.首先根据虹膜图像的灰度分布特征进行粗定位，用阈值分割和二值图像形态学的方法提取瞳孔的圆心和半径，然后用边缘检测的方法提取虹膜的外边缘，最后用圆梯度灰度检测算子进行小范围的精确定位.实验结果表明，该算法提高了虹膜定位的速度，减少了传统虹膜定位算法中搜索的盲目性.

关键词: 边缘检测, 虹膜定位, 圆检测算子

Abstract: A new method for locating iris is proposed. The iris image is first segmented with a threshold. A morphological method for binary images is used to extract the center of pupil and estimate its radius. An edge detector is used to extract the exterior edges of iris. The interior and exterior radii are detected accurately by using a circular template in a reduced candidate area. Experimental results show that the method can speed the iris locating process and reduce blindness existing in previous search algorithms.

Key words: circular template, edge detector, iris location

中图分类号:

TP 391.4

陈颖;陆亨立. 一种新的虹膜定位算法[J]. 上海大学学报(自然科学版).

CHEN Ying;LU Heng-li. A New Algorithm for Locating Iris[J]. Journal of Shanghai University（Natural Science Edition）.

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