WAKEFULNESS ESTIMATION DEVICE, WAKEFULNESS ESTIMATION METHOD AND WAKEFULNESS ESTIMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To estimate drowsiness with little erroneous determination.;SOLUTION: A wakefulness estimation device includes an eye opening acquisition part for acquiring an opening degree of an eye of a subject. The wakefulness estimation device includes a variation calculation part for calculating variation in opening degree of an eye in a prescribed time. The wakefulness estimation device includes a drowsiness determination part for determining drowsiness using the calculated variation and a prescribed threshold.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT