| 一种基于边缘检测的虹膜定位算法 |
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| 引用本文： | 李文清,刘瑞安,孙景瑞,宋庆功.一种基于边缘检测的虹膜定位算法[J].中国民航学院学报,2007,25(5):33-35. |
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| 作者姓名： | 李文清 刘瑞安 孙景瑞 宋庆功 |
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| 作者单位： | 中国民航大学理学院 天津300300(李文清，宋庆功)，天津师范大学物理与电子信息学院 天津300074(刘瑞安，孙景瑞) |
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| 基金项目： | 天津市教委资助项目;中国民航大学校科研和教改项目 |
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| 摘 要： | 虹膜定位是虹膜识别过程中的重要环节,定位速度和精度决定了整个虹膜识别系统的性能。依据虹膜图像特点,提出了一种基于边缘检测的虹膜定位算法:首先利用Sobel算子提取虹膜图像的边缘;然后在边缘图中利用扫描线和直线拟合法粗定虹膜中心及半径;最后在原图边缘附近利用改进的Daugman算子进行虹膜精确定位。与传统的虹膜定位方法相比,该算法快速有效,提高了虹膜定位的速度和精度。
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| 关 键 词： | 虹膜定位 边缘检测 Sobel算子 扫描线 直线拟合 |
| 文章编号： | 1001-5000（2007）05-0033-03 |
| 修稿时间： | 2007-03-05 |
Iris Location Algorithm Based on Edge Detection |
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| LI Wen-qing,LIU Rui-an,SUN Jing-rui,SONG Qing-gong.Iris Location Algorithm Based on Edge Detection[J].Journal of Civil Aviation University of China,2007,25(5):33-35. |
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| Authors: | LI Wen-qing LIU Rui-an SUN Jing-rui SONG Qing-gong |
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| Institution: | 1.College of science, CA UC, Tianjin 300300,China; 2.CoUege of Physics and Electronic Information Science , Tianjin Normal University , Tianfin 300074,China |
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| Abstract: | Iris location is an important process and its speed and accuracy determine the performance in an iris recognition system.According to the characteristic of the iris image,an iris location algorithm based on contour detection is presented in this paper.The Sobel operator is used to extract the iris edge,and then an algorithm,which combines scan line searching with line fitting,is applied to determine the iris center and its size roughly,finally,an improved Daugman operator is used to locate the iris edge precisely.This algorithm is faster and more effective than the usual one and its speed and accuracy are improved. |
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| Keywords: | iris location edge detection Sobel operator scan line line fitting |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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