Iris biometric recognition module and access control assembly
First Claim
Patent Images
1. An iris biometric access control system comprising:
- one or more non-transitory machine readable storage media, and, embodied in the one or more non-transitory machine readable storage media a plurality of modules comprising;
an iris image capture module to;
by a face imager, detect the presence of a human face in a capture zone defined at least in part by a field of view of the face imager;
in response to detection of the human face in the capture zone, align a lens of an iris imager with an iris of the detected human face;
operate an illuminator to illuminate the iris; and
operate the iris imager to produce a plurality of digital images of the iris, wherein the illuminator is operated to vary illumination of the iris synchronously with the frame rate of the iris imager to capture the plurality of digital images in rapid succession through the capture zone; and
an iris image processing and matching module to;
select one or more of the iris images for matching;
extract a usable portion from each of the selected iris images;
compare the extracted portion of each of the selected iris images to a reference iris image;
in response to the comparison of the extracted portions of the selected images and the reference image, operate an access control mechanism;
at least one of the plurality of modules substantially synchronizing pulsed illumination by the illuminator and iris image capture by the iris imager using a focal sweep technique.
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Abstract
An iris biometric recognition module includes technology for capturing images of an iris of an eye of a person, whether the person is moving or stationary, and whether the person is located near the iris image capture device or at a distance from the iris image capture device. The iris biometric recognition technology can perform an iris matching procedure for, e.g., authentication or identity verification purposes. The iris biometric recognition module can be incorporated into, for example, a door lock assembly and other access controlled devices, mechanisms, and systems.
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Citations
35 Claims
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1. An iris biometric access control system comprising:
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one or more non-transitory machine readable storage media, and, embodied in the one or more non-transitory machine readable storage media a plurality of modules comprising; an iris image capture module to; by a face imager, detect the presence of a human face in a capture zone defined at least in part by a field of view of the face imager; in response to detection of the human face in the capture zone, align a lens of an iris imager with an iris of the detected human face; operate an illuminator to illuminate the iris; and operate the iris imager to produce a plurality of digital images of the iris, wherein the illuminator is operated to vary illumination of the iris synchronously with the frame rate of the iris imager to capture the plurality of digital images in rapid succession through the capture zone; and an iris image processing and matching module to; select one or more of the iris images for matching; extract a usable portion from each of the selected iris images; compare the extracted portion of each of the selected iris images to a reference iris image; in response to the comparison of the extracted portions of the selected images and the reference image, operate an access control mechanism; at least one of the plurality of modules substantially synchronizing pulsed illumination by the illuminator and iris image capture by the iris imager using a focal sweep technique. - View Dependent Claims (2, 3, 18, 19, 20, 21, 22)
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4. A door lock assembly comprising:
a housing, and, supported by the housing; a door lock mechanism; and an iris biometric recognition module in communication with the door lock mechanism to; detect the presence of a human face in a capture zone defined at least in part by a field of view; align the lens of an iris imager with an iris of the human face; operate an illuminator to illuminate the iris; produce a plurality of digital images of the iris, wherein the illuminator is operated to vary illumination of the iris synchronously with the frame rate of the iris imager to capture the plurality of digital images in rapid succession through the capture zone; select one or more of the iris images for matching; extract a usable portion from each of the selected iris images; compare the extracted portion of each of the selected iris images to a reference iris image; in response to the comparison of the extracted portions of the selected images and the reference image, operate the door lock mechanism; and substantially synchronize pulsed illumination by the illuminator and iris image capture by the imager using a focal sweep technique. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 24, 25, 26, 27)
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14. A method for operating a door lock in response to iris biometric recognition, the method performed by a door lock assembly, the method comprising:
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detecting a human subject approaching the door lock, and, while the human subject is approaching the door lock; operating a face imager assembly to determine the location of the human subject'"'"'s face; operating an illuminator to illuminate an iris of an eye of the human subject; operating an iris imager assembly to capture a plurality of iris images in rapid succession, wherein the illuminator is operable to vary illumination of the iris synchronously with the frame rate of the iris imager assembly, each of the iris images depicting at least a portion of the iris of the human subject; selecting an iris image of the plurality of iris images; comparing at least a portion of the selected iris image to a reference image; and in response to the comparison of at least a portion of the selected iris image to the reference image, operating the door lock; and substantially synchronizing pulsed illumination by the illuminator and iris image capture by the iris imager assembly using a focal sweep technique. - View Dependent Claims (15, 16, 17, 28, 29, 30, 31, 32)
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33. An iris biometric access control system, comprising:
one or more non-transitory machine readable storage media, and, embodied in the one or more non-transitory machine readable storage media a plurality of modules comprising; an iris image capture module to; by a face imager, detect the presence of a human face in a capture zone defined at least in part by a field of view of the face imager; in response to detection of the human face in the capture zone, align a lens of an iris imager with an iris of the detected human face; operate an illuminator to illuminate the iris; and operate the iris imager to produce a plurality of digital images of the iris, wherein the illuminator is operated to vary illumination of the iris synchronously with the frame rate of the iris imager to capture the plurality of digital images in rapid succession through the capture zone; and an iris image processing and matching module to; select one or more of the iris images for matching; extract a usable portion from each of the selected iris images; compare the extracted portion of each of the selected iris images to a reference iris image; and in response to the comparison of the extracted portions of the selected images and the reference image, operate an access control mechanism; at least one of the plurality of modules substantially synchronizing pulsed illumination and iris image capture using a focal sweep technique by varying light intensity of the pulsed illumination during strobing to maintain a predetermined signal to noise ratio. - View Dependent Claims (34)
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35. The iris biometric access control system of 34, wherein substantially synchronizing pulsed illumination and iris image capture using the focal sweep technique, comprises substantially synchronizing pulsed illumination and iris image capture using the focal sweep technique to accommodate a possibility that the subject may be in motion.
Specification