Methods for performing biometric recognition of a human eye and corroboration of same
First Claim
1. A method for biometric acquisition, comprising:
- acquiring, by a sensor, an image of the iris comprising a reflection of a predefined geometrical shape;
determining a value of deformation or magnification of the geometrical shape in the reflection;
comparing the determined value to a value of deformation or magnification expected for a reflection occurring off a live eye; and
determining that the image of the iris is acquired from a live eye if the determined value is consistent with the expected value.
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Accused Products
Abstract
A method of biometric recognition is provided. Multiple images of the face or other non-iris image and iris of an individual are acquired. If the multiple images are determined to form an expected sequence of images, the face and iris images are associated together. A single camera preferably acquires both the iris and face images by changing at least one of the zoom, position, or dynamic range of the camera. The dynamic range can be adjusted by at least one of adjusting the gain settings of the camera, adjusting the exposure time, and/or adjusting the illuminator brightness. The expected sequence determination can be made by determining if the accumulated motion vectors of the multiple images is consistent with an expected set of motion vectors and/or ensuring that the iris remains in the field of view of all of the multiple images.
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Citations
20 Claims
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1. A method for biometric acquisition, comprising:
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acquiring, by a sensor, an image of the iris comprising a reflection of a predefined geometrical shape; determining a value of deformation or magnification of the geometrical shape in the reflection; comparing the determined value to a value of deformation or magnification expected for a reflection occurring off a live eye; and determining that the image of the iris is acquired from a live eye if the determined value is consistent with the expected value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for biometric acquisition, comprising:
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a sensor configured to acquire an image of the iris comprising a reflection of a predefined geometrical shape; and a processor configured to; determine a value of deformation or magnification of the geometrical shape in the reflection; compare the determined value to a value of deformation or magnification expected for a reflection occurring off a live eye; and determine that the image of the iris is acquired from a live eye if the determined value is consistent with the expected value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification