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Method for generating a unique and consistent signal pattern for identification of an individual

  • US 6,757,409 B2
  • Filed: 03/21/2002
  • Issued: 06/29/2004
  • Est. Priority Date: 11/02/2000
  • Status: Expired due to Term
First Claim
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1. A method of processing bit mapped image data representing the intensity of each of a plurality of pixels forming an image of an area of an individual'"'"'s retina including the optic disk to generate a signal pattern to verify the identity of the individual, comprising:

  • finding a boundary of the optic disk in the image represented by said pixel data wherein finding the optic disk boundary includes fitting an ellipse onto the optic disk image represented by the pixel data and wherein fitting the ellipse onto the optic disk includes calculating a function representing the average intensity of the pixels within an ellipse;

    generating a signal pattern representing the intensity of pixels having a predetermined relationship with respect to the boundary of the optic disk; and

    comparing the generated signal pattern to a stored signal pattern to verify the identity of the individual.

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