Patent ID: 9501704
Filing Date: 2016-11-22
CPC Classification: A61B,B60K,G06K

Claim Text:
1. A drowsiness estimation device detecting a temperature parameter for a drowsiness estimation of a person subject to the drowsiness estimation, and performing the drowsiness estimation, the drowsiness estimation device comprising: acquisition circuitry acquiring visible spectrum image data obtained by capturing a plurality of images of the person with visible spectrum wavelengths, and surface body temperature distribution data obtained by measuring a temperature distribution of a body surface of the person; image processing circuitry specifying an ocular region center for the person by performing image processing on the visible spectrum image data; and correction circuitry detecting a temperature of the ocular region center in the surface body temperature distribution data for the person, and using the temperature of the ocular region center to apply a correction to the temperature parameter for the drowsiness estimation, wherein the correction to the temperature parameter is performed by multiplying the temperature parameter by a first weighting coefficient and the temperature of the ocular region center by a second weighting coefficient, and subtracting a weighted temperature of the ocular region center from a weighted temperature parameter.