计算机应用研究2017，Vol.34Issue(11)：3468-3471,3476,5.DOI:10.3969/j.issn.1001-3695.2017.11.060
基于匹配滤波的虹膜环状线条检测的预处理方法
Preprocessed method for detection of iris circular lines based on matched filter
摘要
Abstract
Iris circular line is one of the specific shape iris textures.To solve the problem that circular line signal is weak and the edge is not clear,and the conventional edge detection method is very easy to missed and false detection,this paper proposed a new iris preprocessed method.Firstly,it localizationed the pupil center coordinate and radius,and obtained ROI that contained a circular line.Since the circular line had the linear characteristics in the whole,and the distribution of the cross section was similar to the Gauss curve in the distribution characteristics,then it designed a two-dimensional matched filter to enhance the signal strength of circular lines,which improved signal to noise ratio.The experimental results after the preprocessing the iris image compared with directly using Canny operator,the detection rate has been not only greatly improved,but also reduces the false detection rate.关键词
虹膜环状线条/离散度/匹配滤波/图像增强/图像预处理Key words
iris circular line/measures of dispersion/matched filter/image enhance/image preprocessed分类
信息技术与安全科学引用本文复制引用
张波,苑玮琦..基于匹配滤波的虹膜环状线条检测的预处理方法[J].计算机应用研究,2017,34(11):3468-3471,3476,5.基金项目
国家自然科学基金资助项目(61271365) （61271365）
