Visual line detecting device and camera having the same

Details Visual line detecting device and camera having the same Visual line detecting device and camera having the same

1989-08-14

1991-07-30

Adams, Jr., Russell E.

354 62, 3541951, 354219, G03B 1336

Patent

active

050363476

ABSTRACT:
A visual line detecting device is arranged to detect the Purkinje image position of an illuminated eye of an observer through light reflected by the eye and to detect the direction of the visual line of the observer from the Purkinje image position and the position of the pupil center of the eye. The device estimates the pupil diameter of the eye from the luminance of external light and determines the position of the center of the pupil by determining the position of a boundary between the pupil and the iris of the eye on the basis of the pupil diameter estimated.

REFERENCES:
patent: 4574314 (1986-03-01), Weinblatt
patent: 4828381 (1989-05-01), Shindo
patent: 4836670 (1989-06-01), Hutchinson

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