PROBLEM TO BE SOLVED: To provide a plant growth rate calculation system capable of accurately measuring the growth rate of a plant, and a plant growth rate calculation method.SOLUTION: According to the present invention, while the position of a reference point B 1 at an arbitrary place defined in the cell maturation area of a plant with reference to the image of the plant acquired by the camera is updated according to the degree of extension of the cell maturation area, a distance from the updated reference point B2 to an arbitrary point in the vicinity of the shoot apex of the plant at each measurement is calculated. Then, the growth rate of the plant is calculated using the distances and the time difference between the respective measurement times.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】植物の生長速度を正確に計測することができる植物生長速度算出システム、及び植物生長速度算出方法を提供する。【解決手段】カメラによって取得した植物の画像を参照し、植物の細胞成熟部域における任意の箇所に設定された基準点B1の位置を、細胞成熟部域の伸長の程度に応じて更新しながら、各測定時における、更新された基準点B2から植物の茎頂部付近の任意の点までの距離を算出し、当該距離と各測定時間の時間差を用いて植物の生長速度を算出する。【選択図】図3
