Texture-biometrics sensor
First Claim
Patent Images
1. A method of performing a biometric function, the method comprising:
- illuminating a purported skin site of an individual with illumination light having a plurality of wavelengths, wherein the purported skin site is in contact with a surface;
receiving light scattered from the purported skin site, wherein the light is received substantially in a plane that includes the surface;
using a processor to carry out the steps of;
forming a plurality of images corresponding to different of the plurality of wavelengths from the received light;
generating an image-texture measure from the plurality of images; and
analyzing the generated image-texture measure to perform the biometric function.
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Accused Products
Abstract
Methods and systems are provided for performing a biometric function. A purported skin site of an individual is illuminated with illumination light. The purported skin site is in contact with a surface. Light scattered from the purported skin site is received in a plane that includes the surface. An image is formed from the received light. An image-texture measure is generated from the image. The generated image-texture measure is analyzed to perform the biometric function.
329 Citations
28 Claims
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1. A method of performing a biometric function, the method comprising:
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illuminating a purported skin site of an individual with illumination light having a plurality of wavelengths, wherein the purported skin site is in contact with a surface; receiving light scattered from the purported skin site, wherein the light is received substantially in a plane that includes the surface; using a processor to carry out the steps of; forming a plurality of images corresponding to different of the plurality of wavelengths from the received light; generating an image-texture measure from the plurality of images; and analyzing the generated image-texture measure to perform the biometric function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14)
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8. The method recited in claim wherein
generating the image-texture measure comprises performing a spatial moving-window analysis of each of the plurality of images.
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15. A biometric sensor comprising:
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a surface adapted for contact with a purported skin site of an individual; an illumination subsystem disposed to illuminate the purported skin site with illumination light having a plurality of wavelengths when the purported skin site is in contact with the surface; a detection subsystem disposed to receive light scattered from the purported skin site, wherein the light is received substantially in a plane that includes the surface; and a computational unit interfaced with the detection subsystem and having; instructions for forming a plurality of images corresponding to different of the plurality of wavelengths from the received light; instructions for generating an image-texture measure from the plurality of images; and instructions for analyzing the generated image-texture measure to perform the biometric function. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification