Systems and methods of biometric analysis with a specularity characteristic

• US 10,643,088 B2
• Filed: 07/27/2017
• Issued: 05/05/2020
• Est. Priority Date: 01/12/2016
• Status: Active Grant

• Current Assignee: Princeton Identity Inc.
• Original Assignee: Princeton Identity Inc.
• Inventors: Mapen, Barry E., Ackerman, David Alan
• Primary Examiner(s): Abdi, Amara
• Application Number:
  US15/661,340
• Publication Number:
  US 20170323167A1
• Time in Patent Office: 1,013 Days
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 2207/10048 Infrared image
• CPC Class Codes: G06T 2207/10152 Varying illumination
• CPC Class Codes: G06T 2207/30041 Eye; Retina; Ophthalmic
• CPC Class Codes: G06T 7/40 Analysis of texture depth or shape recovery from texture G06T7/529
• CPC Class Codes: G06T 7/62 of area, perimeter, diameter or volume
• CPC Class Codes: G06T 7/90 Determination of colour characteristics
• CPC Class Codes: G06T 7/97 Determining parameters from multiple pictures depth or shape recovery from multiple images G06T7/55; stereo camera calibration G06T7/85
• CPC Class Codes: G06V 10/141 Control of illumination
• CPC Class Codes: G06V 20/64 Three-dimensional objects
• CPC Class Codes: G06V 40/166 using acquisition arrangements
• CPC Class Codes: G06V 40/172 Classification, e.g. identification
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: G06V 40/193 Preprocessing; Feature extraction
• CPC Class Codes: G06V 40/197 Matching; Classification
• CPC Class Codes: G06V 40/45 Detection of the body part being alive
• CPC Class Codes: G06V 40/70 Multimodal biometrics, e.g. combining information from different biometric modalities
• CPC Class Codes: H04N 23/56 provided with illuminating means

Abstract

Exemplary embodiments are directed to biometric analysis systems generally including one or more illumination sources, a camera, and an analysis module. The illumination sources are configured to illuminate at least a portion of a face of a subject. The camera is configured to capture one or more images of the subject during illumination of the face of the subject. The analysis module is configured to analyze the one or more images captured by the camera to determine an indication of liveliness of the subject and prevent spoofing.

Claims

1. A biometric analysis system, comprising:

an illumination source configured to emit a static light to illuminate an outer surface of an eye of a subject;

a camera configured to capture one or more images of the eye of the subject during illumination of the outer surface of the eye with the static light of the illumination source, the one or more images displaying a specular reflection of the outer surface of the eye; and

means for receiving as input the one or more images, analyzing a brightness and uniformness of the specular reflection of the outer surface of the eye during the static light illumination, and determining a three-dimensionality of the eye based on the specular reflection.

2. The biometric analysis system of claim 1, wherein the outer surface of the eye is a cornea of the subject.

3. The biometric analysis system of claim 1, wherein if the specularity characteristic of the outer surface of the eye is dim and has low uniformness, the biometric analysis system comprises means for determining that the dim and low uniformness is contraindicative of a live subject and indicative of a facsimile image.

4. The biometric analysis system of claim 1, wherein if the specularity characteristic of the outer surface of the eye is bright and uniform, the biometric analysis system comprises means for determining that the bright and uniform specularity characteristic is contraindicative of a facsimile image and indicative of a live subject.

5. The biometric analysis system of claim 4, wherein the live subject has a bright and uniform specularity characteristic due to a shiny corneal surface of the eye.

6. The biometric analysis system of claim 1, wherein the illumination source emits a near infrared light.

19. The biometric analysis system of claim 1, wherein the static light is a substantially uniform level of illumination.

7. A method of biometric analysis, comprising:

illuminating an outer surface of an eye of a subject with a static light of an illumination source of a biometric analysis system;

capturing one or more images of the eye of the subject with a camera of the biometric analysis system during illumination of the outer surface of the eye with the static light of the illumination source, the one or more images displaying a specular reflection of the outer surface of the eye; and

receiving as input at an analysis module of the biometric analysis system the one or more images;

analyzing with the analysis module a brightness and uniformness of the specular reflection of the outer surface of the eye during the static light illumination; and

determining a three-dimensionality of the eye with the analysis module based on the specular reflection.

8. The method of claim 7, wherein the outer surface of the eve is a cornea of the subject.

9. The method of claim 7, comprising determining that dim and low uniformness of the specularity characteristic of the outer surface of the eye is contraindicative of a live subject and indicative of a facsimile image.

10. The method of claim 7, comprising determining that bright and uniform specularity characteristic of the outer surface of the eye is contraindicative of a facsimile image and indicative of a live subject.

11. The method of claim 10, wherein the live subject has a bright and uniform specularity characteristic due to a shiny corneal surface of the eye.

12. The method of claim 7, comprising emitting a near infrared light with the illumination source.

13. A non-transitory computer-readable medium storing instructions for biometric analysis that are executable by a processing device, wherein execution of the instructions by the processing device causes the processing device to:

illuminate an outer surface of an eye of a subject with a static light of an illumination source of a biometric analysis system;

capture one or more images of the eye of the subject with a camera of the biometric analysis system during illumination of the outer surface of the eye with the static light of the first illumination source, the one or more images displaying a specular reflection of the outer surface of the eye;

receive as input at an analysis module of the biometric analysis system the one or more images;

analyze with the analysis module a brightness and uniformness of the specular reflection of the outer surface of the eye during the static light illumination; and

determine a three-dimensionality of the eye with the analysis module based on the specular reflection.

14. The non-transitory computer-readable medium of claim 13, wherein the outer surface of the eye is a cornea of the subject.

15. The non-transitory computer-readable medium of claim 13, wherein execution of the instructions by the processing device causes the processing device to determine that dim and low uniformness of the specularity characteristic of the outer surface of the eye is contraindicative of a live subject and indicative of a facsimile image.

16. The non-transitory computer-readable medium of claim 13, wherein execution of the instructions by the processing device causes the processing device to determine that bright and uniform specularity characteristic of the outer surface of the eye is contraindicative of a facsimile image and indicative of a live subject.

17. The non-transitory computer-readable medium of claim 16, wherein the live subject has a bright and uniform specularity characteristic due to a shiny corneal surface of the eye.

18. The non-transitory computer-readable medium of claim 13, wherein execution of the instructions by the processing device causes the processing device to emit a near infrared light with the illumination source.