Eye closure recognition system and method
First Claim
1. A system for determining closure state of an eye of a subject, said system comprising:
- a video imaging camera oriented to generate images of an eye of a subject; and
a video processor for processing the images generated with the video imaging camera, said video processor detecting an eye in the video images and determining if the images of the eye are noisy, said video processor determining closure state of the eye based on a shape of the eye in the images if the images of the eye are not noisy, and based on changes in the size of the eye over time if the images of the eye are noisy to determine whether the eye is in an open or closed state.
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Accused Products
Abstract
A system and method are provided for determining eye closure state of the eye of a subject. The system includes a video imaging camera oriented to generate images of an eye of a subject and a video processor for processing the images generated with the video imaging camera. The video processor is configured to detect an eye in the video images'"'"' and determine whether the images of the eye are noisy. The video processor processes geometrical and statistical shape of the eye in the images if the eye is not noisy, and processes changes in the size of the eye over time if the images are noisy. The processor further determines eye closure state based on a ratio of horizontal to vertical dimensions.
33 Citations
28 Claims
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1. A system for determining closure state of an eye of a subject, said system comprising:
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a video imaging camera oriented to generate images of an eye of a subject; and a video processor for processing the images generated with the video imaging camera, said video processor detecting an eye in the video images and determining if the images of the eye are noisy, said video processor determining closure state of the eye based on a shape of the eye in the images if the images of the eye are not noisy, and based on changes in the size of the eye over time if the images of the eye are noisy to determine whether the eye is in an open or closed state. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An eye monitoring system for monitoring an eye of a subject, said system comprising:
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a video imaging camera oriented to generate images of an eye of a subject; and a video processor for processing the images generated with the video imaging camera, said video processor detecting an eye in the video images and determining changes in the size of the eye over time, wherein the video processor determines closure state of the eye based on the changes in the size of the eye over time. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An eye monitoring system for monitoring an eye of a subject, said system comprising:
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a video imaging camera oriented to generate images of an eye of a subject; and a video processor for processing the images generated with the video imaging camera, said video processor detecting an eye in the video images and determining geometrical shape of the eye in the images including horizontal and vertical dimensions and a ratio of the horizontal to vertical dimensions of the eye, wherein the video processor determines closure state of the eye based on the ratio of horizontal to vertical dimensions of the eye. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of determining eye closure state of an eye of the subject, said method comprising the steps of:
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arranging a video imaging camera to generate images of an eye of a subject; generating images of the eye of the subject; processing the images to identify edges of the eye in the image; determining if the images of the eye are noisy; determining shape of the eye if the images of the eye are not noisy; performing a temporal evaluation of the eye if the images of the eye is noisy; and determining closure state of the eye in the images as a function of the geometrical or temporal evolution steps.
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27. A method of determining eye closure state of an eye of the subject, said method comprising the steps of:
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arranging a video imaging camera to generate images of an eye of a subject; generating images of the eye of the subject; processing the images to identify edges of the eye in the images; determining changes in the size of the eye over time; and determining closure state of the eye based on the changes in the size of the eye over time.
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28. A method of determining eye closure state of an eye of the subject, said method comprising the steps of:
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arranging a video imaging camera to generate images of an eye of a subject; generating images of the eye of the subject; processing the images to identify edges of the eye in the images; determining geometrical shape of the eye in the images including horizontal and vertical dimensions; computing a ratio of the horizontal to vertical dimensions of the eye; and determining closure state of the eye based on the ratio of horizontal to vertical dimensions of the eye.
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Specification