Patent ID: 7347365
Filing Date: 2008-03-25
Classification: A61B,B60R,G06K

Abstract:
1. A system for performing a biometric function, the system comprising: an illumination source; a platen disposed to make contact with a skin site of an individual; a light detector; an optical train disposed to provide optical paths between the illumination source and the platen and to provide optical paths between the platen and the light detector, wherein the combination of the illumination source and optical train provides illumination to the platen under multispectral conditions; a computational unit interfaced with the light detector and having instructions to generate a total-internal-reflectance image of the skin site from a first portion of light received from the skin site and to generate a multispectral tissue image of the skin site from a second portion of light received from the skin site; and determining a liveness state of tissue at the skin site from the multispectral tissue image.