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Invariant radial iris segmentation

  • US 8,442,276 B2
  • Filed: 03/10/2006
  • Issued: 05/14/2013
  • Est. Priority Date: 03/03/2006
  • Status: Active Grant
First Claim
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1. A method of identifying a subject by biometric analysis of the iris of an eye, the method comprising the steps of:

  • (1) acquiring an image of an iris of the subject;

    (2) radially segmenting the iris image into a plurality of radial segments;

    (3) for each radial segment, determining data for a data set for a single predetermined one dimensional feature within said segment relative to a reference value of said feature within said image; and

    (4) constructing a template for said subject comprising said data for each of said radial segments; and

    wherein;

    at least steps 2-4 are performed using a programmed computing device; and

    said feature is peaks of color intensity within the iris; and

    said data comprises magnitudes of said peaks and their relative locations along a direction radially outward from a center of a pupil in the image of the iris of the subject.

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