Biometrics based on locally consistent features
First Claim
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1. A method of performing a biometric identification, the method comprising:
- illuminating a small-area of a finger of an individual with illumination light from an illumination source;
receiving, at a sensor, light scattered from the small-area of the finger;
generating, with a processor, a local feature profile from the received light, wherein the local feature profile identifies a feature of the small-area of the finger, the feature of the small-area of the finger being of a type predetermined to exhibit substantial local consistency; and
analyzing, with a processor, the generated local feature profile to perform the biometric identification,wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile,wherein the reference local feature profile was generated from light scattered from a small-area reference skin site, andwherein the small-area of the finger is from a substantially different portion of the finger than the small-area reference skin site.
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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.
390 Citations
62 Claims
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1. A method of performing a biometric identification, the method comprising:
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illuminating a small-area of a finger of an individual with illumination light from an illumination source; receiving, at a sensor, light scattered from the small-area of the finger; generating, with a processor, a local feature profile from the received light, wherein the local feature profile identifies a feature of the small-area of the finger, the feature of the small-area of the finger being of a type predetermined to exhibit substantial local consistency; and analyzing, with a processor, the generated local feature profile to perform the biometric identification, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile, wherein the reference local feature profile was generated from light scattered from a small-area reference skin site, and wherein the small-area of the finger is from a substantially different portion of the finger than the small-area reference skin site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A biometric sensor comprising:
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an illumination subsystem disposed to illuminate a small-area of a finger of an individual with illumination light; a detection subsystem disposed to receive light scattered from the small-area of the finger; 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 of the finger, the feature of the small-area of the finger being of a type predetermined to exhibit substantial local consistency; and instructions for analyzing the generated local feature profile to perform a biometric identification, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile, wherein the reference local feature profile was generated from light scattered from a small-area reference skin site, and wherein the small-area of the finger is from a substantially different portion of the finger than the reference small-area skin site. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
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Specification