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Coaxial optical structure for iris recognition from a distance

机译：用于远距离识别虹膜的同轴光学结构

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摘要

Supporting an unconstrained user interface is an important is-sue in iris recognition. Various methods try to remove the constraint of the iris being placed close to the camera, including portal-based and pan-tilt-zoom (PTZ)-based solutions. Generally speaking, a PTZ-based system has two cameras: one scene camera and one iris camera. The scene camera detects the eye's location and passes this information to the iris camera. The iris camera captures a high-resolution image of the person's iris. Existing PTZ-based systems are divided into separate types and par-allel types, according to how the scene camera and iris camera combine. This paper proposes a novel PTZ-based iris recognition system, in which the iris camera and the scene camera are combined in a coaxial optical structure. The two cameras are placed together orthogonally and a cold mirror is inserted between them, such that the optical axes of the two cam-eras become coincident. Due to the coaxial optical structure, the proposed system does not need the optical axis displacement-related compensa-tion required in parallel-type systems. Experimental results show that the coaxial type can acquire an iris image more quickly and accurately than a parallel type when the stand-off distance is between 1.0 and 1.5 m.
机译：支持不受约束的用户界面是虹膜识别中的重要问题。各种方法试图消除虹膜靠近相机放置的限制，包括基于门户和基于平移-倾斜-缩放（PTZ）的解决方案。一般而言，基于PTZ的系统有两个摄像头：一个场景摄像头和一个虹膜摄像头。场景摄像机检测到眼睛的位置，并将此信息传递给虹膜摄像机。虹膜照相机捕获人虹膜的高分辨率图像。根据场景摄像机和虹膜摄像机的组合方式，现有的基于PTZ的系统分为单独的类型和并行的类型。本文提出了一种新颖的基于PTZ的虹膜识别系统，该系统将虹膜摄像机和场景摄像机组合在同轴的光学结构中。将两个摄像机正交放置在一起，并在它们之间插入一个冷镜，以使两个摄像机的光轴重合。由于同轴光学结构，因此所提出的系统不需要并行型系统中所需的与光轴位移相关的补偿。实验结果表明，当支撑距离在1.0至1.5 m之间时，同轴型比平行型可以更快，更准确地获取虹膜图像。

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  • 来源
    《Optical engineering》 |2011年第5期|p.053201.1-053201.8|共8页
  • 作者

    Ho Gi Jung; Hyun Su Jo; Kang Ryoung Park; Jaihie Kim;

  • 作者单位

    Hanyang University The School of Mechanical Engineering 222 Wangsimni-ro Seongdong-gu, Seoul, 133-791 Republic of Korea;

    Yonsei University The Biometrics Engineering Research Center (BERC) 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749 Republic of Korea;

    Dongguk University The Division of Electronics and Electrical Engineering 26 Pil-dong 3ga Jung-gu, Seoul, 100-715 Republic of Korea;

    Yonsei University The School of Electrical and Electronic Engineering 134 Shinchon-dong Seodaemun-gu, Seoul, 120-749 Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    iris recognition from a distance; pan-tilt-zoom-based iris recognition system; coaxial optical structure;

    机译：从远处识别虹膜;基于云台变焦的虹膜识别系统;同轴光学结构;

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