Method of detecting eye component information for determining sight axis direction and sight axis direction detection apparatus
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United States of America Patent
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Aug 12, 1997
Issued Date -
N/A
app pub date -
Apr 28, 1995
filing date -
Apr 14, 1992
priority date (Note) -
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status (Latency Note)
Importance
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.
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