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一类离焦虹膜图像复原算法的研究
  • ISSN号：0254-4156
  • 期刊名称：自动化学报
  • 时间：2012.6.15
  • 页码：959-968
  • 分类：TP751[自动化与计算机技术—控制科学与工程;自动化与计算机技术—检测技术与自动化装置]
  • 作者机构：[1]吉林大学计算机科学与技术学院,长春130021, [2]吉林大学数学学院,长春130021
  • 相关基金：国家高技术研究发展计划（863计划）（2009AA02Z307）;国家自然科学基金（60873146,60973092,60903097）;吉林省生物识别新技术重点实验室（20082209）;符号计算与知识工程教育部重点实验室资助~~
  • 相关项目：人脸与虹膜信息融合识别新方法研究
作者： 马捷|张忠波|杨航|周春光|
关键词： 虹膜识别, 点扩散函数, 图像复原, 逆滤波, Iris recognition, point spread function（PSF）, image restoration, inverse filtering
中文摘要：

通常,虹膜识别系统中采集设备的景深（Depthof field,DOF）都很小,在采集过程中经常出现离焦现象,理论和实际应用都需要研究这种离焦图像的复原方法.本文研究了一种点扩散函数（Point spread function,PSF）为正六边形的示性函数的离焦虹膜图像复原问题.通过分析PSF频域零点的分布规律,从理论上证明了距频域中心最近的第一圈零点的零点定理,证明过程中也提供了计算这些零点的方法,在此基础上,给出了这一类离焦图像复原的快速算法.实验结果验证了算法的有效性与实时性.

英文摘要：

Generally,acquisition equipments in iris recognition systems have a shallow depth of field（DOF）,which are very sensitive to defocus.Methods to recover defocused images are needed both in theoretical researches and in real-world applications.In this paper,an indicator function of regular hexagon was used as the point spread function（PSF） to solve the recovery problem of defocused iris images.By analyzing the zero distribution of PSF in frequency domain,we theoretically,proved the zero theorem for the round of zero points nearest to the center of frequency domain.We also provided the computational method to find zero points and the fast algorithm to recovery this kind of defocused images.The experimental results showed the efficiency of the algorithm.

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期刊信息
  • 《自动化学报》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国自动化学会 中国科学院自动化研究所
  • 主编：王飞跃
  • 地址：北京东黄城根北街16号
  • 邮编：100717
  • 邮箱：aas@ia.ac.cn
  • 电话：010-64019820
  • 国际标准刊号：ISSN：0254-4156
  • 国内统一刊号：ISSN：11-2109/TP
  • 邮发代号:2-180
  • 获奖情况:
  • 1997年获全国优秀期刊奖,1985、1990、1996、2000年获中国科学院优秀期刊二等奖,2002年获国家期刊奖
  • 国内外数据库收录:
  • 美国数学评论（网络版）,德国数学文摘,荷兰文摘与引文数据库,美国工程索引,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:27550