Apparatus and method of biometric determination using specialized optical spectroscopy systems

摘要

Methods and apparatuses for performing biometric determinations using optical spectroscopy of tissue. The biometric determinations that are disclosed include determination or verifications of identity, estimation of age, estimation of sex, determination of sample liveness and sample authenticity. The apparatuses disclosed are based upon discrete light sources such as light emitting diodes, laser diodes, vertical cavity surface emitting lasers, and broadband sources with multiple narrow-band optical filters. The multiple light sources are encoded in a manner that the tissue response for each source can be efficiently measured. The light sources are spaced at multiple distances from a detector to contribute differing information to the biometric determination task as do light sources with different wavelength characteristics. Apparatuses are disclosed that incorporate a spectral biometric sensor with a personal electronic device such as cellular telephones, personal digital assistants, wristwatches, electronic fobs for the purpose of providing secure biometric access to protected property.

主权项

1. A method of determining a liveness state of a sample, the method comprising:
illuminating the sample with light emitted from a plurality of light sources having different center wavelengths; detecting linear effects of light emanating from the illuminated sample with a light detector to generate a tissue spectrum from the detected linear effects; and analyzing the tissue spectrum to determine whether the sample comprises living tissue and to perform at least one of a biometric identification or a biometric identity verification from the tissue spectrum.