Patent ID: 7804984

Claim:
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.