Explicit raytracing for gimbal-based gazepoint trackers

Details Explicit raytracing for gimbal-based gazepoint trackers Explicit raytracing for gimbal-based gazepoint trackers

2011-08-16

2011-08-16

Mack, Ricky L (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

Reexamination Certificate

active

07997730

ABSTRACT:
A system for determining a three-dimensional location and orientation of an eye within a camera frame of reference includes a camera, an illuminator, and a processor. The camera captures an image of the eye. The illuminator generates a reflection off of a corneal surface of the eye. The processor computes a first two-dimensional location of a pupil reflection image and a corneal reflection image from the image of the eye. The processor predicts a second two-dimensional location of a pupil reflection image and the corneal reflection image as a function of a set of three-dimensional position and orientation parameters of the eye within the camera frame of reference. The processor iteratively adjusts the set until the first two-dimensional location is substantially the same as the second two-dimensional location. The set is the three-dimensional location and orientation of an eye.

REFERENCES:
patent: 5129054 (1992-07-01), Alstad et al.
patent: 6120461 (2000-09-01), Smyth
patent: 2006/0210122 (2006-09-01), Cleveland et al.

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