Methods are described of evaluating the genuineness of a sample presented for biometric evaluation. The sample is illuminated under distinct optical conditions. Light scattered from the sample is received. Multiple images are formed, each image being formed from the received light for one of the optical...http://www.google.ca/patents/US7668350?utm_source=gb-gplus-sharePatent US7668350 - Comparative texture analysis of tissue for biometric spoof detection
