Provide technology that enables alarms regarding getting out of the watched person to be accurately executed. An image analysis apparatus according to an aspect of the present invention is included in an image acquisition unit that acquires a captured image including depth data indicating the depth of each pixel, a foreground extraction unit that extracts a foreground region of the captured image, and the foreground region. With reference to the depth of each pixel, the foreground area that appears on the bed has moved to a position more than a predetermined distance away from the bed, and a bed detection unit that detects the bed of the person to be watched and the bed of the person to be watched Based on the fact that the foreground area that has appeared outside the bed has moved onto the bed, and before detecting the bed of the person being watched, A notification unit that performs notification for notifying that the person being watched has left the floor for a certain time or more when the elapsed time after detecting the person being watched over has exceeded a certain time.見守り対象者の離床に関する警報を精度よく実行可能にする技術を提供する。本発明の一側面に係る画像解析装置は、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、撮影画像の前景領域を抽出する前景抽出部と、前景領域に含まれる各画素の深度を参照し、ベッド上に現れた前景領域がベッドから所定距離以上離れた位置に移動したことに基づいて、見守り対象者の離床を検知する離床検知部と、見守り対象者の離床を検知した後に、ベッド外に現れた前景領域がベッド上に移動したことに基づいて、見守り対象者の就床を検知する就床検知部と、見守り対象者の就床を検知する前に、見守り対象者の離床を検知してからの経過時間が一定時間を超えた場合に、見守り対象者が一定時間以上離床していることを知らせるための通知を行う通知部と、を備える。
