PROBLEM TO BE SOLVED: To provide a vital function monitoring system that facilitates detection of a feature point of a person to be monitored.SOLUTION: A vital function monitoring system comprises: distance data acquisition means for emitting a beam to a subject and acquiring three-dimensional distance data on the subject coordinate conversion means for converting the three-dimensional distance data into three-dimensional orthogonal coordinate data mobile body extraction means for extracting a mobile body from moving points in the three-dimensional orthogonal coordinate data area calculation means for calculating an area of the extracted mobile body coordinate calculation means for calculating vertex coordinates and barycentric coordinates of the mobile body moving velocity calculation means for calculating a moving velocity of the vertex coordinates and a moving velocity of the barycentric coordinates on the basis of time changes in the vertex coordinates and barycentric coordinates of the mobile body determination means for determining whether the area of the mobile body and the vertex coordinates and barycentric coordinates of the mobile body are within a prescribed range movement characteristic calculation means for, when a result of the determination is true, determining the mobile body to be a human being, and calculating a movement characteristic of the mobile body from an average of the moving velocity of the vertex coordinates and the moving velocity of the barycentric coordinates and recording means for recording the calculated movement characteristic of the mobile body.COPYRIGHT: (C)2014,JPO&INPIT【課題】モニタリング対象者の特徴点の検出が容易な生活機能モニタリングシステムを提供する。【解決手段】光線を被写体に投射して、被写体の3次元距離データを取得する距離データ取得手段と、3次元距離データを3次元直交座標データに変換する座標変換手段と、3次元直交座標データの移動点から移動体を抽出する移動体抽出手段と、抽出された移動体の面積を算出する面積算出手段と、移動体の頂点座標と重心座標を算出する座標算出手段と、移動体の頂点座標と重心座標の時間変化に基づいて頂点座標の移動速度と重心座標の移動速度を算出する移動速度算出手段と、移動体の面積と移動体の頂点座標と重心座標とが所定範囲内であるかを判定する判定手段と、判定が真であるとき移動体を人と判断し、頂点座標の移動速度と重心座標の移動速度の平均から、移動体の移動特性を算出する移動特性
