Spatial-spectral fingerprint spoof detection
First Claim
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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Abstract
Methods and apparatus are provided of deriving a discrimination feature set for use in identifying biometric spoofs. True skin sites are illuminated under distinct optical conditions and light reflected from each of the true skin sites is received. True-skin feature values are derived to characterize the true skin sites. Biometric spoofs is similarly illuminated under the distinct optical conditions and light reflected from the spoofs is received. Spoof feature values are derived to characterize the biometric spoofs. The derived true-skin feature values are compared with the derived spoof feature values to select a subset of the features to define the discrimination feature set.
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Citations
30 Claims
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1. A method of deriving a discrimination feature set for use in identifying biometric spoofs, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A computer-readable storage medium having a computer-readable program embodied therein for directing operation of a computational device to derive a discrimination feature set for use in identifying biometric spoofs, the computational device including a processor in communication with a storage device, the computer-readable program including:
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instructions for retrieving, with the processor from the storage device, first data representing properties of first light reflected from each of a plurality of true skin sites under a plurality of distinct optical conditions; instructions for extracting a plurality of true-skin image representations from the first data for each of the true skin sites, wherein the true-skin images are spatially-distributed multispectral images; instructions for retrieving, with the processor from the storage device, second data representing properties of second light reflected from each of a plurality of biometric spoofs; instructions for extracting a plurality of spoof image representations from the second data for each of the biometric spoofs, wherein the spoof image representations comprise spatially distributed multispectral images; and instructions for comparing, with the processor, 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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification