Visual display with illuminators for gaze tracking

摘要

A visual display includes hidden reference illuminators adapted to emit invisible light for generating corneo-scleral reflections on an eye watching a screen surface of the display. The tracking of such reflections and the pupil center provides input to gaze tracking. A method for equipping and an LCD with a reference illuminator are also provided. Also provides are a system and method for determining a gaze point of an eye watching a visual display that includes reference illuminators. The determination of the gaze point may be based on an ellipsoidal cornea model.

主权项

1. A method for determining a gaze point of an eye watching a visual display comprising the steps of:
a) illuminating the eye by light from at least one reference illuminator provided in an object plane; b) acquiring an image of the eye including at least one corneo-scleral reflection of the at least one reference illuminator; c) defining, based on at least one location of the at least one corneo-scleral reflection in the image plane, a mapping between a coordinate system in the object plane and a coordinate system in the image plane; and d) determining, based on the mapping, the eye's gaze point in the object coordinate system, with the mapping comprising an ellipsoidal reflection mapping and a perspective projection.