Study on reverse engineering of historical architecture based on 3D laser scanner

Repair and maintenance of historical architecture includes reinforcement of configuration, repair of figure and so on. All these need surveying information such as blueprint etc. 3D laser scanning technology is one of the important technique methods to acquire spatial data. It scans the architecture point by point quickly; registers and joints point cloud to simulate the shape by computer; reconstructs 3D model accurately finally. It also produces construction drawing including ichnography, elevation, and cutaway. In addition, detail structure and vignette can be got by close-range photogrammetry method, which produces the orthoimage and linear drawing. This method is especially fit for surveying historical architecture that lacks construction records.