Methods and systems for biometric identification

• US 7,751,598 B2
• Filed: 08/25/2006
• Issued: 07/06/2010
• Est. Priority Date: 08/25/2005
• Status: Active Grant

• Current Assignee: Princeton Identity Inc.
• Original Assignee: Sarnoff Corporation (SRI International, Inc.)
• Inventors: Bergen, James R., Matey, James R.
• Primary Examiner(s): Chen; Wenpeng
• Application Number:
  US11/510,197
• Publication Number:
  US 20070047772A1
• Time in Patent Office: 1,411 Days
• Field of Search: 382/117
• US Class Current: 382/117
• CPC Class Codes: G06F 18/28 Determining representative reference patterns, e.g. by averaging or distorting; Generating dictionaries
• CPC Class Codes: G06V 10/772 Determining representative reference patterns, e.g. averaging or distorting patterns; Generating dictionaries
• CPC Class Codes: G06V 40/197 Matching; Classification

Abstract

A method for identifying an iris image can include obtaining an iris image of an eye, segmenting the iris image, generating, from the segmented iris image, a normalized iris image, and generating, from the normalized iris image, an iris template. The method can also include generating a modified iris template by extracting a portion of the iris template, comparing the modified iris template with a plurality of previously stored other modified iris templates and matching the modified iris template with one of the plurality of previously stored other modified iris templates. The method can also include generating a modified iris template by extracting a portion of the iris template, comparing the modified iris template with a plurality of previously stored other modified iris templates, and matching the modified iris template with one of the plurality of previously stored other modified iris templates.

Claims

1. A method for identifying an iris image, the method comprising the steps of:

obtaining an iris image of an eye;

generating, from the iris image, an original iris template;

generating a modified iris template based only on an extracted portion of the iris template, wherein the extracted portion is a row of the iris template;

comparing the modified iris template with a plurality of previously stored other modified iris templates to select at least one candidate for full template matching; and

comparing the selected at least one candidate with the original iris template.

2. A method for identifying an iris image, the method comprising the steps of:

obtaining an iris image of an eye;

generating, from the iris image, an original iris template;

generating a modified iris template based only on an extracted portion of the iris template, wherein the extracted portion is a column of the iris template;

comparing the modified iris template with a plurality of previously stored other modified iris templates to select at least one candidate for full template matching; and

comparing the selected at least one candidate with the original iris template.

3. A method for identifying an iris image, the method comprising the steps of:

obtaining an iris image of an eye;

generating, from the iris image, an original iris template;

generating a modified iris template based only on an extracted portion of the iris template, wherein the extracted portion of the iris template is a diagonal region;

comparing the modified iris template with a plurality of previously stored other modified iris templates to select at least one candidate for full template matching; and

comparing the selected at least one candidate with the original iris template.