Multispectral imaging biometrics
AssigneeLumidigm, Inc.
InventorRobert K. Rowe
Life of this patent
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Abstract
Methods and systems are provided for performing a biometric measurement on an individual. A purported skin site of the individual is illuminated under a plurality of distinct optical conditions during a single illumination session. Light scattered beneath a surface of the purported skin site is received separately for each of the plurality of distinct optical conditions. A multispectral image of the purported skin site is derived from the received light. A biometric function is performed with the derived multispectral image.
Claims27
A method of performing a biometric measurement on an individual, the method comprising:
- illuminating a purported skin site of the individual under a plurality of distinct optical conditions during a single illumination session;
- receiving light scattered beneath a surface of the purported skin site separately for each of the plurality of distinct optical conditions;
- deriving a multispectral image of the purported skin site from the received light;
- and
- performing a biometric function with the derived multispectral image;
- and determining the identity of the individual from the multispectral image.
A multispectral sensor comprising:
- a platen adapted for placement of a purported skin site by an individual;
- an illumination source disposed to illuminate the purported skin site when placed on the platen;
- an imaging system disposed to receive light scattered beneath a surface of the purported skin site;
- and
- a controller interfaced with the illumination source and the imaging system, the controller including:
- instructions to illuminate the purported skin site with the illumination source under a plurality of distinct optical conditions during a single illumination session;
- instructions to derive a multispectral image of the purported skin site from light received by the imaging system separately for each of the plurality of optical conditions;
- and
- instructions to perform a biometric function with the derived multispectral image;
- and determining the identity of the individual from the multispectral image.
A method of analyzing a tissue site, the method comprising:
- receiving light scattered from the tissue site under first and second distinct polarization conditions during a single illumination session in which a position of the tissue site is substantially unchanged, wherein the second polarization condition does not define a complementary state relative to the first polarization condition;
- deriving an image of the tissue site from the received light;
- and performing a biometric function with the derived image;
- and determining the identity of the individual from the multispectral image.
Dependencies are inferred from the claim text.