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虹膜区域选取与识别率对应关系分析 被引量:7

Analysis of Relationship between Region of Iris and the Accuracy Rate
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摘要 在人眼自然张开状态下,虹膜遭受睫毛、眼睑和反射光斑不同程度地干扰而失去了部分信息,因此需要找出虹膜保留面积与虹膜识别率之间的对应关系,从而根据不同的识别率要求估计不同的人眼最小张开程度。利用相关系数识别方法作为评测手段分别在不同的虹膜图库中进行了实验。结果证明,选取靠近瞳孔的虹膜内环区域与整个虹膜区域的比率在大于37.5%时,或者暴露的虹膜两侧扇形的角度大于70°时,就可以获得区分个体的特征量,达到比较稳定的识别率。实验结果还给出了虹膜内环区域面积与识别率的对应关系曲线以及虹膜两侧扇形区域面积与识别率之间的对应关系曲线。 When people open their eyes normally, the regions of iris will be covered by eyelids and eyelashes. We investigate the performance of the use of a partial iris for recognition by using normalized correlation matching method in different iris image databases. The experimental results show that the inner rings of the iris over 37.5 % of iris pattern exposure, or the angle of the sector exposed over 70° would be necessary for enough information in human verification. The results also show the curve of the relationship between percentage of the iris used and the accuracy rate.
出处 《光学学报》 EI CAS CSCD 北大核心 2008年第5期937-942,共6页 Acta Optica Sinica
基金 国家自然科学基金资助项目(60672078)资助课题
关键词 医用光学与生物技术 生物特征识别 虹膜识别 相关系数 虹膜区域 medical optics and biotechnology biometrics iris identification normalized correlation region of iris
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参考文献11

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二级参考文献22

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