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US 8,285,010 B2Granted
Biometrics based on locally consistent features
AssigneeLumidigm, Inc.
InventorRobert K. Rowe
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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.
Claims62
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, and
- wherein the small-area of the finger is from a substantially different portion of the finger than the small-area reference skin site.
5 more elements
A biometric sensor comprising:
- 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.
7 more elements
Dependencies are inferred from the claim text.