| 基于图像抽样的快速虹膜定位算法 |
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| 引用本文： | 王云新,刘铁根,江俊峰.基于图像抽样的快速虹膜定位算法[J].光电工程,2008,35(9):122-126. |
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| 作者姓名： | 王云新 刘铁根 江俊峰 |
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| 作者单位： | 天津大学精仪学院光电信息技术科学教育部重点实验室,天津,300072;天津大学精仪学院光电信息技术科学教育部重点实验室,天津,300072;天津大学精仪学院光电信息技术科学教育部重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金，天津市应用基础研究项目 |
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| 摘 要： | 提出了一种基于图像抽样的快速虹膜定位算法.首先在抽样图像中搜索瞳孔内一点,并以该点为起点检测粗略的虹膜内边缘点,然后在原分辨力图像中利用梯度算子精确定位内边缘点从而实现内边缘定位;虹膜外边缘定位采用Canny算子和Hough变换实现,由于基于抽样图像进行边缘提取,忽略了虹膜纹理等细节边缘信息,减少了大量外边缘干扰,提高了算法实时性.实验结果表明该算法的定位准确率达到99.47%,定位速度为0.162s.与经典的虹膜定位算法相比,该算法的定位速度有了很大提高.
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| 关 键 词： | 虹膜定位 图像抽样 灰度投影 边缘提取 |
| 收稿时间： | 2008/1/20 |
Rapid Iris Localization Algorithm Based on Image Sampling |
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| WANG Yun-xin,LIU Tie-gen,JIANG Jun-feng.Rapid Iris Localization Algorithm Based on Image Sampling[J].Opto-Electronic Engineering,2008,35(9):122-126. |
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| Authors: | WANG Yun-xin LIU Tie-gen JIANG Jun-feng |
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| Affiliation: | WANG Yun-xin,LIU Tie-gen,JIANG Jun-feng ( Key Laboratory of Opto-electronics Information , Technical Science of MOE,College of Precision Instrument , Opto-electronics Engineering,Tianjin University,Tianjin 300072,China ) |
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| Abstract: | A rapid iris localization algorithm based on image sampling was proposed. One point in the pupil was firstly detected in the sampled image. With this point as the initial one, the coarse edge points were detected, and then the inner iris edge could be located by the exact edge points extracted by gradient operator in the image with original resolution. The outer iris edge was located using Canny operator and Hough transform. Since the edges were extracted based on the sampled image, plenty of detailed bound... |
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| Keywords: | iris localization image sampling gray projection edge extraction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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