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Iris recognition systems

  • US 9,002,053 B2
  • Filed: 10/05/2012
  • Issued: 04/07/2015
  • Est. Priority Date: 10/07/2011
  • Status: Active Grant
First Claim
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1. A method of capturing an image of an iris free of specularities from a spectacle-wearing user, for use in an iris recognition identification system, which includes an illumination source and an image capture device, the method comprising the steps of:

  • illuminating an eye of the user from a first illumination position associated with a first optical path, and capturing a first image of the eye;

    determining if the first image comprises a specular image in a first region of interest, the first region of interest comprising an image of the iris, the specular image being formed by light reflected from the spectacles, the determining step comprising analyzing the first image to identify if the location of the specular image is at least partly coincidence with the iris image;

    illuminating, in response to a presence of a specular image, the eye from a second illumination position associated with a second optical path different to the first optical path, such that the specular image is shifted to a second region, the second region being coincident with at least one of an image of a sclera of the eye and an image of a pupil of the eye; and

    capturing a second image of the eye with the specular image located at the second region.

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