Apparatus for determining the alertness of a driver
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United States of America Patent
Stats
-
Aug 1, 2000
Grant Date -
N/A
app pub date -
Jan 28, 1999
filing date -
Jan 28, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus for determining the alertness of a person, especially a vehicle or machine operator, comprises an image pickup system for recording images of the area of at least one eye of the person, and an image evaluating system which evaluates the images detected by the image pickup system and contains means for detecting the shutting of an eye. The image evaluating system has means for determining pupil size and an evaluating apparatus which determines the alertness according to the eye closing state information obtained by the closed-eye detection means, and according to the pupil size information obtained by the pupil size determining means, with classification into one of at least three stages. The apparatus is used, for example, for determining the alertness of drivers of motor vehicles.
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