US Patent 7508960 Projection of light patterns for liveness verification of biometrics

The biometric system disclosed herein comprises device for providing a pattern; the device having a source of light and a source for providing a pattern. The source of light is operative to illuminate an object with light. An imaging device is disposed at a different location from the source of light to capture an image from the object. The system further comprises a pattern comparison device; the pattern comparison device being operative to compare details of the pattern disposed upon the object and details of a reference pattern; the pattern comparison device rejecting the object if the pattern disposed upon the object does not match the reference pattern.