PROBLEM TO BE SOLVED: To precisely and also easily determine the number of stems of a target crop.SOLUTION: The present invention includes: an image data input unit 11 for inputting plural pieces of image information on an image of a crop； a stem number information input unit 12 for inputting information on the number of the stems of the crop in each piece of the input image information； a learning unit 14 and a learned model holding unit 15 for constructing a learned model by performing a deep learning of relating the image of the crop and the number of stems according to the input pieces of image information and the stem number information； an image input unit 16 for inputting the image information of a crop with an unknown number of stems； a stem number level determination unit 10 for determining the number of stems on the basis of the learned model holding unit 15 constructed by the learning device 14 in the input image information； and a determination result output unit 17 for outputting the information on the determined number of stems.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT
