Method for automatically reconstructing three-dimensional model of power transmission line iron tower from design drawing

The invention discloses a method for automatically reconstructing a three-dimensional model of a power transmission line iron tower from a design drawing, and solves the problem that the three-dimensional model of the current power transmission line iron tower can only be subjected to manual three-dimensional conversion by professional designers according to the design drawing. The invention relates to a two-stage heuristic three-dimensional reconstruction method, which comprises the following steps of: firstly, extracting the content of a plane drawing through a deep learning network, expressing the content as a vector primitive set, then dividing the vector primitive set into a contour vector and an internal structure vector, and roughly drawing a three-dimensional contour frame of a local part of each section of an iron tower by the contour vector; and finally, according to the internal vector of each plane, describing internal structure details on the three-dimensional contour frame. According to the meth