Patent ID: 8879790

Claim:
A drowsiness assessment device installed in a vehicle and that assesses drowsiness of a driver, comprising: an eyelid outline detection unit configured to detect an eyelid outline candidate line from a face image, the candidate line being a candidate of an eyelid outline; an eyelid outline determination unit configured to determine whether or not an amount of displacement of the candidate line when blinking is within a preset range of an amount of displacement of the eyelid outline when blinking normally; an eyelid outline setting unit configured to set the candidate line as the eyelid outline, on the basis of a determination result of the eyelid outline determination unit; and a drowsiness estimation unit configured to estimate the drowsiness of the driver, on the basis of an amount of displacement of upper and lower eyelid outlines that are set by the eyelid outline setting unit, wherein the eyelid outline setting unit sets the candidate line as the eyelid outline when it is determined by the eyelid outline determination unit that the amount of displacement of the candidate line is within the preset range, and does not set the candidate line as the eyelid outline when it is determined by the eyelid outline determination unit that the amount of displacement of the candidate line is not within the preset range, and the drowsiness estimation unit does not perform an estimation of the drowsiness of the driver, when it is determined by the eyelid outline determination unit that the amount of displacement of the candidate line is not within the preset range.