Systems And Methods Of Biometric Analysis With A Spectral Discriminator

• US 20170337441A1
• Filed: 07/27/2017
• Published: 11/23/2017
• 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, Kiernan, Michael J.
• Granted Patent: US 10,452,936 B2
• Time in Patent Office: 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

1-72. -72. (canceled)

73. A biometric analysis system, comprising:

an illumination source configured to illuminate an iris of a subject;

a spectral discriminator including a first optical filter having first set of pass characteristics and a second optical filter having second set of pass characteristics, the spectral discriminator configured to selectively receive light scattered from the iris through the first optical filter and the second optical filter;

a camera configured to capture one or more images of the subject during passage of the light scattered from the iris through the first optical filter, and configured to capture one or more images of the subject during passage of the light scattered from the iris through the second optical filter; and

an analysis module configured to receive as input the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, and determine whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, existence of the match being indicative of a facsimile image.

74. The biometric analysis system of claim 73, wherein the illumination source emits near infrared light.

75. The biometric analysis system of claim 73, wherein the first set of pass characteristics of the first optical filter allow passage of only light visible to a human eye.

76. The biometric analysis system of claim 75, wherein the light visible to the human eye is in a wavelength range from about 380 nm to about 780 nm.

77. The biometric analysis system of claim 73, wherein the second set of pass characteristics of the second optical filter allow passage of only near infrared light.

78. The biometric analysis system of claim 77, wherein the near infrared light is in a wavelength range of about a 30 nm band about a wavelength of about 850 nm.

79. The biometric analysis system of claim 75, wherein the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter are red-green-blue images.

80. The biometric analysis system of claim 77, wherein the captured one or more images of the subject during passage of the light scattered from the iris through the second optical filter are near infrared images including the structural information about the iris.

81. The biometric analysis system of claim 73, wherein the camera is configured to capture a sequence of images of the subject in rapid succession during passage of the light scattered from the iris through the first optical filter, and configured to capture a sequence of images of the subject in rapid succession during passage of the light scattered from the iris through the second optical filter.

82. The biometric analysis system of claim 73, if the match exists between the iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, the analysis module determines that the match is contraindicative of a live subject and indicative of a facsimile image.

83. The biometric analysis system of claim 73, if the match does not exist between the iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, the analysis module determines that the lack of the match is contraindicative of a facsimile image and indicative of a live subject.

84. The biometric analysis system of claim 73, wherein the camera is configured to capture one or more images of areas surrounding the iris of the subject.

85. The biometric analysis system of claim 84, wherein the analysis module is configured to receive as input the one or more images of the areas surrounding the iris of the subject, and determine whether a portion of at least one of the one or more images is monochromatic.

86. The biometric analysis system of claim 73, wherein the analysis module is configured to receive as input the one or more images of the subject during passage of the light scattered from the iris through the second optical filter, and is configured to analyze a corneal specularity structure displayed in the one or more images.

87. The biometric analysis system of claim 73, comprising a second visible illumination source configured to illuminate an eye area of the subject to stimulate contraction of a pupil of the subject.

88. The biometric analysis system of claim 87, wherein the camera is configured to capture a sequence of images of the subject during contraction of the pupil of the subject.

89. The biometric analysis system of claim 88, wherein the analysis module is configured to receive as input the sequence of images of the subject during contraction of the pupil of the subject, and measure a diameter of the pupil before contraction and during contraction to determine an indication of liveliness of the subject.

90. A method of biometric analysis, comprising:

illuminating an iris of a subject with an illumination source of a biometric analysis system;

selectively receiving light scattered from the iris through a first optical filter and a second optical filter of a spectral discriminator of the biometric analysis system, the first optical filter having first set of pass characteristics and the second optical filter having second set of pass characteristics;

capturing one or more images of the subject with a camera of the biometric analysis system during passage of the light scattered from the iris through the first optical filter;

capturing one or more images of the subject with the camera of the biometric analysis system during passage of the light scattered from the iris through the second optical filter;

receiving as input at an analysis module of the biometric analysis system the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter; and

determining with the analysis module of the biometric analysis system whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, existence of the match being indicative of a facsimile image.

91. The method of claim 90, comprising capturing a sequence of images of the subject with the camera in rapid succession during passage of the light scattered from the iris through the first optical filter, and capturing a sequence of images of the subject with the camera in rapid succession during passage of the light scattered from the iris through the second optical filter.

92-97. -97. (canceled)

98. 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 iris of a subject with an illumination source of a biometric analysis system;

selectively receive light scattered from the iris through a first optical filter and a second optical filter of a spectral discriminator of the biometric analysis system, the first optical filter having first set of pass characteristics and the second optical filter having second set of pass characteristics;

capture one or more images of the subject with a camera of the biometric analysis system during passage of the light scattered from the iris through the first optical filter;

capture one or more images of the subject with the camera of the biometric analysis system during passage of the light scattered from the iris through the second optical filter;

receive as input at an analysis module of the biometric analysis system the captured one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter; and

determine with the analysis module of the biometric analysis system whether a match exists between iris structural information displayed in the one or more images of the subject during passage of the light scattered from the iris through the first optical filter and the second optical filter, existence of the match being indicative of a facsimile image.

99-111. -111. (canceled)