Abstract: Due to a series of problems in the real scene 3D model, such as unreasonable data structure and difficulty to recognize and utilize, methods including automatic selection of building boundaries and refined model correction in the monomer model framework are proposed in this paper, which utilize the key technologies of chi-squared distribution, enhanced feature pyramid network, multi-scale progressive growth optimization algorithm, parent-child coding and so on. Experimental results show that the established monomer 3D model satisfies the requirement of a 0.05 m functional level model, and the number of patches decreased by 99.54% in comparison to the MESH model, which achieves the rapid monomerization and structurization of the real scene 3D model of buildings and provides technical support for the construction of real scene 3D China.

Key words: real scene 3D model, meticulous treatment, monomer model, data lightweight processing, semantic information