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METHODS FOR GRAY-LEVEL RIDGE FEATURE EXTRACTION AND ASSOCIATED PRINT MATCHING

  • US 20080101663A1
  • Filed: 10/31/2006
  • Published: 05/01/2008
  • Est. Priority Date: 10/31/2006
  • Status: Abandoned Application
First Claim
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1. A method for extracting features from a print image comprising the steps of:

  • obtaining a gray-scale image and at least one binary image;

    relative to each of a plurality of reference points, extracting at least one corresponding ridge segment from the gray-scale image guided by the at least one binary image, with the segment being extracted along an axis of an elongated shape of a ridge that represents a raised portion of skin;

    determining, using the at least one binary image, a corresponding set of ridge features associated with the extracted ridge segment; and

    storing the sets of ridge features to use in comparing the print image to another print image.

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