Liveness sensor
First Claim
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1. A sensor system comprising:
- an illumination subsystem disposed to provide light at a plurality of discrete wavelengths to a sample;
a detection subsystem disposed to receive light scattered within tissue of the sample; and
a computational unit interfaced with the detection subsystem and having;
instructions for deriving spatially distributed multispectral characteristics of the received light at the plurality of discrete wavelengths; and
instructions for determining a liveness state of the tissue from the derived spatially distributed multispectral characteristics.
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Abstract
Methods and systems are provided for biometric sensing. An illumination subsystem provides light at discrete wavelengths to a skin site of an individual. A detection subsystem receives light scattered from the skin site. A computational unit is interfaced with the detection system. The computational unit has instructions for deriving a spatially distributed multispectral image from the received light at the discrete wavelengths. The computational unit also has instructions for comparing the derived multispectral image with a database of multispectral images to identify the individual.
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20 Claims
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1. A sensor system comprising:
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an illumination subsystem disposed to provide light at a plurality of discrete wavelengths to a sample; a detection subsystem disposed to receive light scattered within tissue of the sample; and a computational unit interfaced with the detection subsystem and having; instructions for deriving spatially distributed multispectral characteristics of the received light at the plurality of discrete wavelengths; and instructions for determining a liveness state of the tissue from the derived spatially distributed multispectral characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining a liveness state of a sample, the method comprising:
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illuminating the sample with light at a plurality of discrete wavelengths; receiving light scattered within tissue of the sample; deriving spatially distributed multispectral characteristics of the received light at the plurality of discrete wavelengths; and determining a liveness state of the tissue from the derived spatially distributed multispectral characteristics. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification