Crop information acquisition and three-dimensional image presentation method, device and system

The invention relates to a crop information acquisition and three-dimensional image presentation method, device and system, and the method comprises the steps: decomposing an object in an image, and obtaining a plurality of sub-objects; determining edge contours of the sub-objects; constructing a plurality of reference points on the sub-object by using laser; calculating the coordinates of each reference point by using the visual difference; performing laser scanning on the area where the sub-object is located to obtain a three-dimensional point cloud data set; screening the three-dimensional point cloud data set by using a screening domain to obtain a reference data set; a sub-three-dimensional model corresponding to the sub-object is constructed in the three-dimensional space using the reference data set, and a three-dimensional model belonging to the object is constructed using the sub-three-dimensional model. According to the crop information acquisition and three-dimensional image presentation method, de