Automatic capturing and photographing device for hydroponic plants and three-dimensional point cloud reconstruction method

The invention provides an automatic capturing and photographing device for hydroponic plants and a three-dimensional point cloud reconstruction method. A first X-axis movement assembly, a first Y-axis movement assembly and a first Z-axis movement assembly are linked to drive a telescopic assembly and a gripper assembly to move, and a second X-axis movement assembly, a second Y-axis movement assembly and a second Z-axis movement assembly are linked to drive a rotary photographing assembly to move; and the rotary photographing assembly can perform 360-degree rotary photographing on the single plant grabbed by the gripper assembly, and can reconstruct three-dimensional point cloud data of the single plant through a picture. According to the device, the plants in the hydroponic tank can be grabbed and placed at the positions which are not shielded for photographing, multi-angle complete photographing can be conveniently carried out on the grabbed plants, and three-dimensional point cloud reconstruction can be con