Patent ID: 8045766
Filing Date: 2011-10-25
Classification: G06K

Abstract:
1. A sleepiness determination device comprising: facial expression information obtaining means for obtaining at least two of facial expression information elements (A) to (K) associated with a facial image including: sleepiness determination means for: the sleepiness determination means obtains the (C) tilt angle of the head in addition to the at least two of the facial expression information elements (A) to (K) other than the (C) tilt angle of the head, the at least two of the facial expression information elements (A) to (K) including the (A) distance between the left and right corners of the mouth and the (B) distance between the eyebrow and the eye; a first condition includes that sleepiness is determined to be present based on the (A) distance between left and right corners of a mouth, a second condition includes that sleepiness is determined to be present based on the distance (B) between an eyebrow and eye and based on the first condition, and a third condition includes that sleepiness is determined to be present based on the (C) tilt angle of a head and based on the first and second conditions, and the level of sleepiness is determined as slight sleepiness when the only first condition is satisfied, the level of sleepiness is determined as moderate sleepiness higher than the slight sleepiness when only the second condition is satisfied and the level of sleepiness is determined as strong sleepiness higher than the moderate sleepiness when only the third condition is satisfied, and the level of sleepiness is determined as no sleepiness when none of the conditions are satisfied.