PROBLEM TO BE SOLVED: To provide a visual line state determination device capable of accurately determining whether a drivers visual line state is either a central vision state or a peripheral vision state.SOLUTION: A visual line state determination device 1 comprises: a driver monitoring camera 2 which captures images including each one of the right and left eyes of a driver an eyeball rotational angle data acquisition unit 41 which acquires eyeball rotational angle data on each of the right and left eyes on the basis of the captured images and a visual line state determination unit 45 which determines the drivers visual line state on the basis of an eyeball rotational angle histogram obtained from the eyeball rotational angle data of each of the right and left eyes. The visual line state determination unit 45 determines that the visual line state is a peripheral vision state when a difference in the most frequent value of the eyeball rotational angle histogram in each of the right and left eyes is above a threshold value, and determines that the visual line state is a central vision state when the difference is equal to or below the threshold value.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】ドライバの視線状態が中心視状態又は周辺視状態の何れであるかを正確に判定できる視線状態判定装置を提供する。【解決手段】視線状態判定装置1は、ドライバの左眼及び右眼それぞれを含む画像を撮像するドライバ監視カメラ2と、撮像した画像に基づき左眼及び右眼それぞれの眼球回転角データを取得する眼球回転角データ取得部41と、左眼及び右眼それぞれの眼球回転角データの眼球回転角ヒストグラムに基づきドライバの視線状態を判定する視線状態判定部45と、を備える。視線状態判定部45は、左眼及び右眼それぞれにおける眼球回転角ヒストグラムの最頻値の差異が閾値よりも大きい場合には視線状態が周辺視状態である判定し、当該差異が閾値以下の場合には視線状態が中心視状態であると判定する。【選択図】図1
