BIOMETRIC SENSOR
First Claim
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1. A method of performing a biometric function, the method comprising:
- providing illumination light having a plurality of wavelengths;
directing the illumination light to an illumination region of a biometric sensor to illuminate a skin site of an individual, wherein directing the illumination light is performed while the skin site and the illumination region are in relative motion to sequentially illuminate different portions of the skin site;
receiving light scattered from the different portions of the skin site;
forming an image of the skin site from the received light at the plurality of wavelengths; and
comparing the image with images comprised by a database of images to perform the biometric function.
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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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Citations
24 Claims
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1. A method of performing a biometric function, the method comprising:
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providing illumination light having a plurality of wavelengths;
directing the illumination light to an illumination region of a biometric sensor to illuminate a skin site of an individual, wherein directing the illumination light is performed while the skin site and the illumination region are in relative motion to sequentially illuminate different portions of the skin site;
receiving light scattered from the different portions of the skin site;
forming an image of the skin site from the received light at the plurality of wavelengths; and
comparing the image with images comprised by a database of images to perform the biometric function. - 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 configured to provide illumination light having a plurality of wavelengths;
an optical subsystem configured to direct the illumination light to an illumination region of the biometric sensor;
a detection subsystem disposed to receive light from the illumination region; and
a computational unit interfaced with the illumination subsystem and with the detection subsystem and having;
instructions to sequentially illuminate different portions of a skin site of an individual with the illumination light at the illumination site while the skin site and the illumination region are in relative motion;
instructions to receive light scattered from the different portions of the skin site;
instructions to from an image of the skin site from the received light at the plurality of wavelengths; and
instructions to compare the image with images comprised by a database of images to perform a biometric function. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification