PROBLEM TO BE SOLVED: To provide a sleepiness determining apparatus for determining a sleepiness level with high accuracy even when facial expression change occurs.SOLUTION: The sleepiness determining apparatus 100 includes: a facial expression change acquiring section 110 that acquires the degree and speed of the facial expression change of a human a facial expression change determination section 120 that determines whether the degree of the facial expression change is less than a prescribed threshold value and a sleepiness determination section 130 that determines the sleepiness level of the human based on the speed of the facial expression change subject to the degree of the facial expression change being less than the prescribed threshold value.COPYRIGHT: (C)2013,JPO&INPIT【課題】表情変動が生じている場合であっても眠気レベルを精度良く判定することができる眠気判定装置を提供すること。【解決手段】眠気判定装置100は、人の表情変動の大きさおよび速度を取得する表情変動取得部110と、表情変動の大きさが所定の閾値未満であるか否かを判定する表情変動判定部120と、表情変動の大きさが所定の閾値未満であることを条件として、表情変動の速度に基づく人の眠気レベルの判定を行う眠気判定部130とを有する。【選択図】図1
