PROBLEM TO BE SOLVED: To provide a dominant eye determination device which can properly determinate a dominant eye of a driver of a vehicle.SOLUTION: A dominant eye determination device 1 comprises: a driver information acquisition part 11 for acquiring a driver's face orientation DF, a right eye visual line direction DER, and a left eye visual line direction DEL； an angle acquisition part 12 for acquiring a right eye angle θR being an angle formed of the right eye visual line direction DER and a driver's front face direction DS, and a left eye angle θL being an angle formed of the left eye visual line direction DEL and the front face direction DS； a condition sufficiency determination part 13 for determining whether or not a condition sufficiency state is continued for a determination period； and a dominant eye determination part 14 for comparing a right eye front face time at which the right eye angle θR is smaller than the left eye angle θL, and a left eye front face time at which the left eye angle θL is smaller than the right eye angle θR during the determination period when it is determined that the condition sufficiency state is continued for the determination period, determining that a right eye R is a dominant eye when the right eye front face time is longer, and determining that a left eye L is a dominant eye when the left eye front face time is longer.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】車両の運転者の利き目を適切に判定することができる利き目判定装置を提供する。【解決手段】利き目判定装置１は、運転者の顔向きＤＦ、右目視線方向ＤＥＲ、及び左目視線方向ＤＥＬを取得する運転者情報取得部１１と、右目視線方向ＤＥＲと運転者の正面方向ＤＳとのなす角度である右目角度θＲ、及び、左目視線方向ＤＥＬと正面方向ＤＳとのなす角度である左目角度θＬを取得する角度取得部１２と、条件充足状態が判定期間にわたって継続したか否かを判定する条件充足判定部１３と、条件充足状態が判定期間にわたって継続したと判定された場合に、判定期間中において、左目角度θＬよりも右目角度θＲの方が小さい右目正面時間と、右目角度θＲよりも左目角度θＬの方が小さい左目正面時間と、を比較して、右目正面時間の方が長いときに右目Ｒが利き目と判定し、左目正面時間の方が長いときに左目Ｌが利き目と判定する利き目判定部１４と、を備える。【選択図】図１
