APPARATUS AND METHOD OF BIOMETRIC DETERMINATION USING SPECIALIZED OPTICAL SPECTROSCOPY SYSTEMS
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Abstract
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.
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Citations
34 Claims
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1-11. -11. (canceled)
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12. A method of determining a liveness state of a sample, the method comprising:
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illuminating the sample with light emitted from a light source; detecting light emanating from the sample with a plurality of light detectors having different separations from the light source; and analyzing the detected light to determine whether the sample comprises living tissue. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of determining a liveness state of a sample, the method comprising:
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illuminating the sample with near-infrared light emitted from a light source; detecting light emanating from the sample with a plurality of light detectors disposed on a same side of the sample and having different separations from the light source; spectrally analyzing the detected light to determine whether the sample comprises living human tissue.
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24. A sensor comprising:
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a light source; a plurality of light detectors having different separations from the light source; a microprocessor or computer adapted to determine whether a sample comprises living tissue with light received by the light detector when the sapmle is illuminated with light emitted from the light source. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A sensor comprising:
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a near-infrared light source; a plurality of light detectors disposed on the same side of a sample as the infrared light source; and a microprocessor or computer adapted to determine whether the sample comprises living human tissue by spectrally analyzing light received by the plurality of light detectors when the sample is illuminated with light emitted from the infrared light source.
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Specification