Eyelid shape estimation using eye pose measurement
First Claim
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1. A method for estimating pose of an eye, the method comprising:
- under control of a hardware processor;
detecting, from an image of the eye, a boundary between an eyelid of an eye and an iris of the eye using an edge detector;
determining an eyelid shape of the eye using the boundary between the eyelid of the eye and the iris of the eye,wherein an eyelid shape coordinate system of the eyelid shape comprises a horizontal shift, a vertical shift, and a curvature of the eyelid,wherein a functional relationship between the eyelid shape coordinate system and an eye pose coordinate system comprises a mapping matrix, andwherein the eye pose coordinate system comprises an azimuthal deflection angle of the eye and a zenithal deflection angle of the eye relative to a resting orientation of the eye; and
estimating an eye pose of the eye based at least in part on the eyelid shape and the functional relationship.
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Abstract
Systems and methods for eyelid shape estimation are disclosed. In one aspect, after receiving an eye image of an eye (e.g., from an image capture device), an eye pose of the eye in the eye image is determined. From the eye pose, an eyelid shape (of an upper eyelid or a lower eyelid) can be estimated using an eyelid shape mapping model. The eyelid shape mapping model relates the eye pose and the eyelid shape. In another aspect, the eyelid shape mapping model is learned (e.g., using a neural network).
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Citations
21 Claims
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1. A method for estimating pose of an eye, the method comprising:
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under control of a hardware processor; detecting, from an image of the eye, a boundary between an eyelid of an eye and an iris of the eye using an edge detector; determining an eyelid shape of the eye using the boundary between the eyelid of the eye and the iris of the eye, wherein an eyelid shape coordinate system of the eyelid shape comprises a horizontal shift, a vertical shift, and a curvature of the eyelid, wherein a functional relationship between the eyelid shape coordinate system and an eye pose coordinate system comprises a mapping matrix, and wherein the eye pose coordinate system comprises an azimuthal deflection angle of the eye and a zenithal deflection angle of the eye relative to a resting orientation of the eye; and estimating an eye pose of the eye based at least in part on the eyelid shape and the functional relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A head mounted display system comprising:
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an image capture device configured to capture an eye image; non-transitory memory configured to store an eye pose mapping model; and a hardware processor in communication with the non-transitory memory, the hardware processor programmed to; receive the eye image captured by the image capture device; determine an eyelid shape of an eye in the eye image; and estimate an eye pose of the eye based at least in part on the eyelid shape and the eye pose mapping model, wherein the eye pose mapping model relates the eyelid shape to the eye pose. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for estimating an eye pose from an eyelid shape, the method comprising:
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under control of a hardware processor; determining an eyelid shape of an eye in an eye image; and estimating an eye pose based at least partly on the eyelid shape. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification