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
47 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 illuminated sample with a light detector; 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, 23, 24, 25, 26, 27, 28)
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29. A method of determining a liveness state of a sample, the method comprising:
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sequentially illuminating the sample with light emitted from a plurality of light sources having different center wavelengths within a spectral range between 350 and 2500 nm; detecting light emanating from the illuminated sample with a light detector disposed on a same side of the sample as at least one of the light sources; and spectrally analyzing the detected light to determine whether the sample comprises living human tissue. - View Dependent Claims (30)
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31. A sensor comprising:
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a light source; a light detector; and a microprocessor or computer adapted to determine whether a sample comprises living tissue with light received by the light detector when the sample is illuminated with light emitted from the light source. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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46. A sensor comprising:
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a plurality of light sources having different center wavelengths within a spectral range between 350 and 2500 nm; a light detector disposed on a same side of the sample as at least one of the light sources; and a microprocessor or computer adapted to determine whether a sample comprises living human tissue by spectrally analyzing light received by the light detector when the sample is sequentially illuminated with light emitted from the plurality of light sources. - View Dependent Claims (47)
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Specification