BIOMETRICS BASED ON LOCALLY CONSISTENT FEATURES
First Claim
Patent Images
1. A method of performing a biometric function, the method comprising:
- illuminating a small-area purported skin site of an individual with illumination light;
receiving light scattered from the small-area purported skin site;
generating a local feature profile from the received light, wherein the local feature profile identifies a feature of the small-area purported skin site, of a type predetermined to exhibit substantial local consistency; and
analyzing the generated local feature profile to perform the biometric function,wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile was generated from light scattered from a small-area reference skin site.
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Accused Products
Abstract
Systems, devices, methods, and software are described for biometric sensors that permit a reduction in the size of the sensing area without significant reduction in biometric functionality of the sensor. A skin site of an individual is illuminated, and light scattered from the skin site is received. An image of a locally consistent feature of the skin site is formed from the received light. The locally consistent feature is analyzed to perform a biometric function.
38 Citations
50 Claims
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1. A method of performing a biometric function, the method comprising:
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illuminating a small-area purported skin site of an individual with illumination light; receiving light scattered from the small-area purported skin site; generating a local feature profile from the received light, wherein the local feature profile identifies a feature of the small-area purported skin site, of a type predetermined to exhibit substantial local consistency; and analyzing the generated local feature profile to perform the biometric function, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile was generated from light scattered from a small-area reference skin site. - View Dependent Claims (6, 7, 8, 9, 10, 11, 16, 17, 18, 19)
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2-5. -5. (canceled)
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12-15. -15. (canceled)
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20-27. -27. (canceled)
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28. A biometric sensor comprising:
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an illumination subsystem disposed to illuminate a small-area purported skin site of an individual with illumination light; a detection subsystem disposed to receive light scattered from the small-area purported skin site; and a computational unit interfaced with the detection subsystem and having; instructions for generating a local feature profile from the received light, wherein the local feature profile identifies a feature of the small-area purported skin site of a type predetermined to exhibit substantial local consistency; and instructions for analyzing the generated local feature profile to perform a biometric function, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile was generated from light scattered from a small-area reference skin site. - View Dependent Claims (34, 35, 36, 37, 38, 39, 46, 47, 48, 49)
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29-33. -33. (canceled)
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40-45. -45. (canceled)
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50-62. -62. (canceled)
Specification