Provide a system that can properly watch pedestrians. An abnormal state detection device according to an aspect of the present invention is a captured image obtained by capturing a pedestrian performing a walking motion, and acquires a captured image including depth data indicating the depth of each pixel in the captured image. A pedestrian that appears in the photographed image with reference to a depth of each pixel included in the extracted person area, and an extraction unit that extracts a person area in which the pedestrian is photographed in the acquired photographed image A behavior measuring unit that measures the behavior of the local part in the real space by continuously specifying the position in the real space of the local part of the body to be observed, Based on the behavior of the local part, a state determination unit that determines whether or not the pedestrian is in an abnormal state, and as a result of the determination, when it is determined that the pedestrian is in an abnormal state, To inform that the pedestrian is in an abnormal state And a notification unit that performs an abnormality detection notification.歩行者を適切に見守ることのできるシステムを提供する。本発明の一側面に係る異常状態検知装置は、歩行動作を行う歩行者を撮影した撮影画像であって、当該撮影画像内の各画素の深度を示す深度データを含む撮影画像を取得する画像取得部と、取得した前記撮影画像内で、前記歩行者の写る人物領域を抽出する抽出部と、抽出した前記人物領域に含まれる各画素の深度を参照して、前記撮影画像に写る前記歩行者の身体のうち観測の対象とする局所的な部位の実空間上の位置を継続的に特定することで、前記局所的な部位の実空間上の挙動を測定する挙動測定部と、測定された前記局所的な部位の挙動に基づいて、前記歩行者が異常状態にあるか否かを判定する状態判定部と、前記判定の結果、前記歩行者が異常状態にあると判定された場合に、前記歩行者が異常状態にあることを知らせるための異常検知通知を行う通知部と、を備える。
