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Methods for performing biometric recognition of a human eye and corroboration of same

  • US 8,798,333 B2
  • Filed: 03/13/2013
  • Issued: 08/05/2014
  • Est. Priority Date: 11/11/2005
  • Status: Active Grant
First Claim
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1. A method of biometric acquisition, comprising the steps of:

  • projecting light, by an illuminator, of a predetermined wavelength onto an iris and a non-iris region;

    measuring a reflectance of the iris and a reflectance of the non-iris region based on light reflected off the iris and the non-iris region;

    comparing a ratio of the reflectance of the iris to the reflectance of the non-iris region, with a reflectance ratio pre-determined from a live eye using light of the same wavelength; and

    determining that the iris is from a live eye if the ratio of the measured reflectances is consistent with the pre-determined reflectance ratio.

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