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Living eye judging method and living eye judging device

  • US 7,616,785 B2
  • Filed: 07/01/2004
  • Issued: 11/10/2009
  • Est. Priority Date: 07/04/2003
  • Status: Active Grant
First Claim
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1. A living eye judging method comprising:

  • a first step of obtaining an image captured by shooting a subject with illumination coaxial with an optical axis of a camera; and

    a second step of judging whether an eye included in the image is a living eye or not based on luminance in a pupil region of the eye in the image,wherein in the second step, the eye is judged as a living eye when a difference in luminance between in the pupil region and in an iris region or a luminance ratio of the pupil region to the iris region is larger than a threshold value.

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