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Spatial-spectral fingerprint spoof detection

  • US 7,804,984 B2
  • Filed: 07/31/2006
  • Issued: 09/28/2010
  • Est. Priority Date: 07/31/2006
  • Status: Active Grant
First Claim
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1. A method of deriving a discrimination feature set for use in identifying biometric spoofs, the method comprising:

  • illuminating each of a plurality of true skin sites under a plurality of distinct optical conditions;

    extracting true images from light received from each of the plurality of true skin sites, wherein the true images comprise spatially-distributed multispectral images;

    deriving true-skin feature values for each of a plurality of features from the true images to characterize the true skin sites;

    illuminating each of a plurality of biometric spoofs under the plurality of distinct optical conditions;

    extracting spoof images from light received from each of the biometric spoofs, wherein the spoof images comprise spatially-distributed multispectral images;

    deriving spoof feature values for each of the plurality of features from the spoof images to characterize the biometric spoofs; and

    comparing the derived true-skin feature values with the derived spoof feature values to select a subset of the features to define the discrimination feature set.

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