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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:

期数:

2013年03期

页码:

34-37

栏目:

智能、算法、系统工程

出版日期:

1900-01-01

文章信息/Info

Title:

Research on Application of Iris Recognition Based on Improved Algorithm

文章编号:

1673-629X（2013）03-0034-04

作者:

许威¹; 权芳芳²; 姜媛媛¹; 李陈陈¹; 皇淼淼¹

[1]安徽理工大学 电气与信息工程学院;[2]安徽理工大学 理学院

Author(s):

XU Wei; QUAN Fang-fang; JIANG Yuan-yuan; LI Chen-chen.HUANG Miao-miao

关键词:

虹膜定位; Daugman定位算子; 虹膜归一化; 二维Log-Gabo滤波; 虹膜识别

Keywords:

iris localization; daugman localization operator; iris normalization; 2D Log-Gabo filter; iris recognition

文献标志码:

A

摘要:

文中通过虹膜图像的直方图选取合适的阈值,对虹膜图像进行二值化处理.采用基于几何灰度投影的方法粗定位虹膜内边界,使用改进的Daugman定位算子定位外边界,再用最小二乘圆拟合方法对内外边界进行圆拟合,实验结果表明此种算法使得虹膜定位精确度较高,定位速度快,能较好地满足实时性的要求.同时提出了一种基于线段提取的虹膜归一化方法.在特征提取方面,采用基于二维Log-Gabo滤波的方法通过多尺度多方向构成的多通道滤波器提取虹膜特征信息,减少了虹膜编码的长度及特征匹配的时间,匹配准确率较高,能较好地提高虹膜识别的准确率

Abstract:

The appropriate threshold is obtained through the histogram of the iris image,which is used in iris binary processing. The iris inner boundary is orientated roughly based on geometric gray-level projection method and the iris external boundary is orientated by the improved Daugman localization operator,both of which are fitted accurately by the method of the least squares round fitting. The experi-mental results show that the localization algorithm has the advantages of high positioning accuracy and high positioning speed,and can satisfy the requirement of real-time. Meanwhile,put forward an iris normalization method which is based on line extraction. In the feature extraction,iris feature information is extracted by the method of 2D Log-Gabo filter which can generate multi-channel filter though multi-scale and multiple directions,the method also can reduce the length of the iris code and the time of feature matching,improve the feature matching accuracy,can effectively improve the accuracy of iris recognition

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更新日期/Last Update: 1900-01-01