Iris recognition systems
First Claim
1. A method of capturing an image of an iris free of specularities from a spectacle-wearing user, for use in an iris recognition identification system, which includes an illumination source and an image capture device, the method comprising the steps of:
- illuminating an eye of the user from a first illumination position associated with a first optical path, and capturing a first image of the eye;
determining if the first image comprises a specular image in a first region of interest, the first region of interest comprising an image of the iris, the specular image being formed by light reflected from the spectacles, the determining step comprising analyzing the first image to identify if the location of the specular image is at least partly coincidence with the iris image;
illuminating, in response to a presence of a specular image, the eye from a second illumination position associated with a second optical path different to the first optical path, such that the specular image is shifted to a second region, the second region being coincident with at least one of an image of a sclera of the eye and an image of a pupil of the eye; and
capturing a second image of the eye with the specular image located at the second region.
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Accused Products
Abstract
The present invention concerns a method for capturing an image of an iris free of specularities from a spectacle-wearing user for use in an iris recognition identification system, which includes an illumination source and an image capture device. The method comprises illuminating the user'"'"'s eye from a first illumination position associated with a first optical path, and capturing a first image of the eye; and determining if the first image comprises a specular image in a first region of interest, the specular image being formed by light reflected from the spectacles. If a specular image is present, the method further comprises illuminating the eye from a second illumination position associated with a second optical path different to the first optical path, such that the specular image is shifted to a second region; and capturing a second image of the eye.
39 Citations
42 Claims
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1. A method of capturing an image of an iris free of specularities from a spectacle-wearing user, for use in an iris recognition identification system, which includes an illumination source and an image capture device, the method comprising the steps of:
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illuminating an eye of the user from a first illumination position associated with a first optical path, and capturing a first image of the eye; determining if the first image comprises a specular image in a first region of interest, the first region of interest comprising an image of the iris, the specular image being formed by light reflected from the spectacles, the determining step comprising analyzing the first image to identify if the location of the specular image is at least partly coincidence with the iris image; illuminating, in response to a presence of a specular image, the eye from a second illumination position associated with a second optical path different to the first optical path, such that the specular image is shifted to a second region, the second region being coincident with at least one of an image of a sclera of the eye and an image of a pupil of the eye; and capturing a second image of the eye with the specular image located at the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28)
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20. An iris recognition identification system suitable for capturing an image of an iris free from specularities from a spectacle-wearing user, the system comprising:
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an image capture device for capturing one or more images of the spectacle-wearing user'"'"'s eye; a first illumination device for illuminating the spectacle-wearing user'"'"'s eye from a first illumination position associated with a first optical path; a determining module for determining if a first captured image illuminated from the first illumination position, comprises a specular image located in a first region of interest, the first image of interest comprising an image of the iris, the specular image being formed by light reflected from the spectacles, the determining module being configured to analyze the first image to identify if the location of the specular image is at least partly coincident with the iris image; a second illumination device for illuminating the spectacle-wearing user'"'"'s eye from a second illumination position; and
whereinthe second illumination position is associated with a second optical path different to the first optical path such that the location of the specular image is shifted to a second region in a second captured image when the second illumination device is active, the second region being coincident with at least one of an image of a sclera of the spectacle wearing user'"'"'s eye and an image of a pupil of the spectacle wearing user'"'"'s eye in the second captured image. - View Dependent Claims (21, 22, 29, 30, 31, 32, 33, 34, 35)
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36. An illumination support block for use in an iris recognition identification system, comprising:
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a first portion comprising one or more light sources associated with a first illumination position; a second portion comprising one or more light sources associated with a second illumination position; and
whereinthe block is arranged such that in use light emitted from a light source associated with the first portion forms an acute angle with respect to light emitted from a light source associated with the second portion. - View Dependent Claims (37, 38, 39, 40)
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41. An iris recognition identification system suitable for capturing an image of an iris free from specularities from a spectacle-wearing user, the system comprising:
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an image capture device for capturing one or more images of the spectacle-wearing user'"'"'s eye; first illumination source for illuminating the spectacle-wearing user'"'"'s eye from a first illumination position associated with a first optical path; a processor for determining if a first captured image illuminated from the first illumination position, comprises a specular image located in a first region of interest, the specular image being formed by light reflected from the spectacles, the first region of interest comprising an image of the iris, and the processor being arranged to analyze the first image to identify if the location of the specular image is at least partly coincident with the iris image; second illumination source for illuminating the spectacle-wearing user'"'"'s eye from a second illumination position; and
whereinthe second illumination position is associated with a second optical path different to the first optical path such that the location of the specular image is shifted to a second region when the second illumination source is active, the second region being coincident with at least one of an image of a sclera of the spectacle-wearing user'"'"'s eye and an image of a pupil of the spectacle-wearing user'"'"'s eye. - View Dependent Claims (42)
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Specification