Polyhedral unit construction method and system for holographic simulation of irregular ballast particles

The invention provides a polyhedral unit construction method and system for holographic simulation of irregular railway ballast particles, and belongs to the technical field of railway ballast track design. A three-dimensional image of the railway ballast particles is obtained through holographic recording and wavefront reproduction of a holographic camera shooting method, and a three-dimensional geometry of the railway ballast particles is obtained; according to the method, high-fidelity reduction of the three-dimensional contour of the ballast particles is realized, the two-dimensional geometric contour of the ballast particles in each projection plane is extracted by using a virtual ballast particle three-dimensional projection platform and an edge detection algorithm, feature points for constructing polygons of all orders are selected or updated based on a parallel line rule, and a'plane reconstruction-space fusion 'method is used for constructing the three-dimensional contour of the ballast particles. Ea