ACCOMMODATING PUPIL NON-CONCENTRICITY IN EYETRACKER SYSTEMS

Title:

ACCOMMODATING PUPIL NON-CONCENTRICITY IN EYETRACKER SYSTEMS

Document Type and Number:

WIPO Patent Application WO2003039359

Kind Code:

A3

Abstract:

Embodiments of the present invention relate to eyetracking methods and systems that compensate for physiological variations in th e location of the pupil within the eye. In one embodiment, a video eyetracker measures the location of a pupil within the eye. Using measured observable features of the eye, including pupil diameter, a pupil-location-offset is estimated with respect to a fixed point on the eyeball. The location of a fixed point within the eyeball is estimated as a function of the measured pupil location and the estimated pupil-location-offset.

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Inventors:

CLEVELAND DIXON

Application Number:

PCT/US2002/035219

Publication Date:

February 26, 2004

Filing Date:

November 04, 2002

Export Citation:

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Assignee:

LC TECHNOLOGIES INC (US)

International Classes:

A61B3/11; A61B3/113; (IPC1-7): A61B3/14

Foreign References:

US4859050A	1989-08-22
US5500671A	1996-03-19
US5094521A	1992-03-10
US5532784A	1996-07-02

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