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Iris deblurring method based on global and local iris image statistics

  • US 8,374,389 B2
  • Filed: 02/06/2009
  • Issued: 02/12/2013
  • Est. Priority Date: 02/06/2009
  • Status: Active Grant
First Claim
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1. A method of identifying a living being, comprising the steps of:

  • using a camera to capture a blurred visual image of an iris of the living being;

    digitally unblurring the blurred visual image based on a distribution of eye image gradients in an empirically-collected sample of eye images and distributions from characteristics of local regions;

    processing the unblurred image to determine an identity of the living being; and

    approximating the distribution of eye image gradients as a quadratic piecewise function.

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