Biometrics with spatiospectral spoof detection
First Claim
Patent Images
1. A method of performing a biometric function on a purported skin site, the method comprising:
- illuminating the purported skin site under a plurality of distinct optical conditions;
receiving spatially distributed multispectral light reflected from the purported skin site;
deriving a feature value for each of a plurality of features from the received light;
performing a comparison of the derived feature value for each of the plurality of features with reference feature values; and
determining whether the purported skin site is a true skin site from the comparison.
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Abstract
Methods and apparatus are described for performing a biometric function on a purported skin site. The site is illuminated under distinct optical conditions and light reflected from the site is received. A feature value for several features is derived from the received light, permitting a comparison to be performed with reference feature values. Whether the purported skin site is a true skin site is determined from the comparison.
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Citations
26 Claims
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1. A method of performing a biometric function on a purported skin site, the method comprising:
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illuminating the purported skin site under a plurality of distinct optical conditions; receiving spatially distributed multispectral light reflected from the purported skin site; deriving a feature value for each of a plurality of features from the received light; performing a comparison of the derived feature value for each of the plurality of features with reference feature values; and determining whether the purported skin site is a true skin site from the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A biometric sensor comprising:
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an illumination subsystem disposed to illuminate a purported skin site of an individual; a detection subsystem disposed to receive light reflected from the purported skin site; and a controller in communication with the illumination subsystem and with the detection subsystem, the controller including; instructions for illuminating the purported skin site with the illumination subsystem under a plurality of distinct optical conditions during a single illumination session; instructions for receiving spatially distributed multispectral light reflected from the purported skin site with the detection subsystem; instructions for deriving a feature value for each of a plurality of features from the received light; instructions for performing a comparison of the derived feature value for each of the plurality of features with reference feature values; and determining whether the purported skin site is a true skin site from the comparison. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification