EYE LOCATION AND GAZE DETECTION SYSTEM AND METHOD
First Claim
Patent Images
1. A system for detecting eye location of an animate subject, comprising:
- a pair of cameras, one each for capturing images of one of the subject'"'"'s eyes;
a pair of infrared illuminators, one each associated with a camera, operable to illuminate the subject'"'"'s pupils;
an image processing system operable to locate the subject'"'"'s pupils in two dimensional space, using a red-eye detection process, and to locate the subject'"'"'s pupils in three dimensional space using a triangulation process based on the direction from the cameras to each pupil.
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Abstract
A system and method for gaze detection of an animate subject, typically a human. The subject'"'"'s pupils are located in three dimensional space, using red-eye detection techniques and triangulation. Then, the gaze direction is determined based on the shape of the subject'"'"'s irises.
48 Citations
20 Claims
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1. A system for detecting eye location of an animate subject, comprising:
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a pair of cameras, one each for capturing images of one of the subject'"'"'s eyes; a pair of infrared illuminators, one each associated with a camera, operable to illuminate the subject'"'"'s pupils; an image processing system operable to locate the subject'"'"'s pupils in two dimensional space, using a red-eye detection process, and to locate the subject'"'"'s pupils in three dimensional space using a triangulation process based on the direction from the cameras to each pupil. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting eye location of an animate subject, comprising:
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using a pair of cameras, one each for capturing images of one of the subject'"'"'s eyes; using a pair of infrared illuminators, one each associated with a camera, to illuminate the subject'"'"'s pupils; alternately illuminating the subject'"'"'s eyes and synchronizing the cameras'"'"'image acquisition, such that a first camera acquires a bright image from its associated eye while a second camera acquires a dark image from its associated eye, then the first camera acquires a dark images of its associated eye while the second camera acquires a bright image of its associated eye; using an image processing system to locate the subject'"'"'s pupils in two dimensional space by using a red-eye detection process, and to locate the subject'"'"'s pupils in three dimensional space by using a triangulation process based on the direction from the cameras to each pupil. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A system for detecting eye location and gaze location of an animate subject, comprising:
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a pair of cameras, one each for capturing images of one of the subject'"'"'s eyes; a pair of infrared illuminators, one each associated with a camera, operable to illuminate the subject'"'"'s pupils; an eye location image processing system operable to use the images from the cameras to locate the subject'"'"'s pupils in two dimensional space, using a red-eye detection process, and to locate the subject'"'"'s pupils in three dimensional space using a triangulation process based on the direction from the cameras to each pupil; and a gaze direction processing system operable to use the same images to detect the gaze direction of the subject'"'"'s eyes based on the shape of the subject'"'"'s irises. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for detecting eye location and gaze direction of an animate subject, comprising:
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using a pair of cameras, one each for capturing images of one of the subject'"'"'s eyes; using a pair of infrared illuminators, one each associated with a camera, to illuminate the subject'"'"'s pupils; alternately illuminating the subject'"'"'s eyes and synchronizing the cameras'"'"'image acquisition, such that a first camera acquires a bright image from its associated eye while a second camera acquires a dark image from its associated eye, then the first camera acquires a dark images of its associated eye while the second camera acquires a bright image of its associated eye; using an eye location image processing system to locate the subject'"'"'s pupils in two dimensional space by using a red-eye detection process, and to locate the subject'"'"'s pupils in three dimensional space by using a triangulation process based on the direction from the cameras to each pupil; and using a gaze direction processing system to use the same images to detect the gaze direction of the subject'"'"'s eyes based on the shape of the subject'"'"'s irises. - View Dependent Claims (19, 20)
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Specification