Biometrics based on locally consistent features
First Claim
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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 across non-overlapping skin sites of the individual; and
analyzing the generated local feature profile to perform the biometric function, the biometric function selected from a group consisting of an identity function, a demographic function, and an anthropometric function,wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile generated from light scattered from a small-area reference skin site of the individual that was previously captured during biometric enrollment of the individual and does not overlap with the small-area purported 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.
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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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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 across non-overlapping skin sites of the individual; and analyzing the generated local feature profile to perform the biometric function, the biometric function selected from a group consisting of an identity function, a demographic function, and an anthropometric function, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile generated from light scattered from a small-area reference skin site of the individual that was previously captured during biometric enrollment of the individual and does not overlap with the small-area purported skin site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 21, 22)
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11. 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 across non-overlapping skin sites of the individual; and instructions for analyzing the generated local feature profile to perform a biometric function selected from a group consisting of an identity function, a demographic function, and an anthropometric function, wherein analyzing the generated local feature profile comprises comparing the generated local feature profile with a reference local feature profile generated from light scattered from a small-area reference skin site of the individual that was previously captured during biometric enrollment of the individual and does not overlap with the small-area purported skin site. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24)
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Specification