IRIS BOUNDARY ESTIMATION USING CORNEA CURVATURE
First Claim
Patent Images
1. A wearable display system comprising:
- a display;
an image capture device configured to capture an image of an eye of a user;
non-transitory memory configured to store executable instructions; and
a hardware processor in communication with the display, the image capture device, and the non-transitory memory, the hardware processor programmed by the executable instructions to;
obtain a camera calibration;
obtain physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise;
a radius of a corneal sphere comprising a cornea of the eye,a radius of an iris of the eye, anda distance between a center of the corneal sphere and a center of a pupil of the eye;
receive the image of the eye, the image comprising at least a portion of the cornea of the eye and the iris of the eye;
determine an intersection between the corneal sphere and the eye;
convert, based at least in part on the camera calibration, the intersection from the coordinate frame of the eye to a coordinate frame of the image of the eye;
determine the limbic boundary based at least in part on the intersection; and
utilize the limbic boundary in a biometric application.
5 Assignments
0 Petitions
Accused Products
Abstract
Examples of systems and methods for determining a limbic boundary of an iris of an eye are provided. Properties of the corneal bulge can be computed from eye images. An intersection of the corneal bulge with the eye surface (e.g., sclera) can be determined as the limbic boundary. The determined limbic boundary can be used for iris segmentation or biometric applications. A head mounted display can include a camera that images the eye and a processor that analyzes the eye images and determines the limbic boundary.
-
Citations
20 Claims
-
1. A wearable display system comprising:
-
a display; an image capture device configured to capture an image of an eye of a user; non-transitory memory configured to store executable instructions; and a hardware processor in communication with the display, the image capture device, and the non-transitory memory, the hardware processor programmed by the executable instructions to; obtain a camera calibration; obtain physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise; a radius of a corneal sphere comprising a cornea of the eye, a radius of an iris of the eye, and a distance between a center of the corneal sphere and a center of a pupil of the eye; receive the image of the eye, the image comprising at least a portion of the cornea of the eye and the iris of the eye; determine an intersection between the corneal sphere and the eye; convert, based at least in part on the camera calibration, the intersection from the coordinate frame of the eye to a coordinate frame of the image of the eye; determine the limbic boundary based at least in part on the intersection; and utilize the limbic boundary in a biometric application. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A wearable display system comprising:
-
a display; an image capture device configured to capture an image of an eye of a user; non-transitory memory configured to store executable instructions; and a hardware processor in communication with the display, the image capture device, and the non-transitory memory, the hardware processor programmed by the executable instructions to; obtain physiological parameters of the eye in a three-dimensional coordinate frame of the eye, wherein the physiological parameters comprise; a radius of a corneal sphere comprising a cornea of the eye, a radius of an iris of the eye, and a distance between a center of the corneal sphere and a center of the pupil of the eye; receive the image of the eye, the image comprising at least a portion of the cornea of the eye and the iris of the eye; determine an intersection between the corneal sphere and the eye; and determining the limbic boundary based at least in part on the intersection. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification