To solve a problem of the inability to accurately detect a motion of a person due to the inability to accurately detect a position of a bed.SOLUTION: An information processor of the present invention includes: input means that receives an input of an installation height of a photographing device that photographs a range image； range image acquisition means that acquires a distance image of a predetermined area including a bed； and calculating means that detects a floor surface portion in the predetermined area on the basis of the distance image and calculates installation information including a new installation height of the photographing device on the basis of the floor surface portion.SELECTED DRAWING: Figure 1【課題】寝床の位置が正確に検出できないことによる人物の動作を正確に検出することができないこと。【解決手段】本発明の情報処理装置は、距離画像を撮影する撮影装置の設置高さの入力を受け付ける入力手段と、寝床を含む所定領域の距離画像を取得する距離画像取得手段と、距離画像に基づいて所定領域内の床面部分を検出し、当該床面部分に基づいて撮影装置の新たな設置高さを含む設置情報を算出する算出手段と、を備える。【選択図】図１
