Providing technology to detect the fall of the person being watched over. In the image analysis apparatus according to one aspect of the present invention, in order to detect a fall from the bed of the person being watched over, in the detection area for fall set in a predetermined height range from the bed surface at the bedside, When it is determined whether or not a foreground area of a predetermined size or more continues to appear for a predetermined time or more, and it is determined that a foreground area of the predetermined size or more continues to appear in the slip detection area for a predetermined time or more In addition, it detects a fall of the person being watched over from the bed.見守り対象者のずり落ちを検知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、見守り対象者のベッドからのずり落ちを検知するために、ベッドサイドにおいてベッド面から所定の高さの範囲に設定されたずり落ち用検知領域に、所定の大きさ以上の前景領域が所定時間以上継続して現れるか否かを判定し、当該所定の大きさ以上の前景領域がずり落ち用検知領域に所定時間以上継続して現れたと判定した場合に、見守り対象者のベッドからのずり落ちを検知する。
