Method of detecting eye component information for determining si

Details Method of detecting eye component information for determining si Method of detecting eye component information for determining si

1993-04-13

1995-11-21

Sikes, William L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, 351247, A61B 310

Patent

active

054692342

ABSTRACT:
In a pupil center detection method and a pupil ring portion detection method, which can obtain a pupil center and a pupil ring portion necessary for calculating a sight axis of an eyeball from specific points on the basis of a light beam reflected by the eyeball, when the position of the pupil center of the eyeball is detected by utilizing an image based on a light beam radiated from a projection device onto the eyeball and reflected by the eyeball, a large number of pupil ring portion positions are obtained, an average value and a standard deviation of the large number of pupil ring portion positions are obtained, and the pupil center is detected using values within a range defined by the average value and the standard deviation.

REFERENCES:
patent: 4836670 (1989-06-01), Hutchinson
patent: 5280312 (1994-01-01), Yamada et al.

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