Research on Coordinate Transformation Method in Three-dimensional Reconstruction of Architecture

Based on the analysis of the basic principle of three-dimensional reconstruction, this paper discusses the key problem in the process of three-dimensional reconstruction, and gives prominence to the most important process, which is making coordinate transformation and space projection to construct the model. The paper mainly adopts the method of the view separation by coordinate axes differing from the way of searching the silhouette of the views, achieving the coordinate conversion from view coordinate into space projection coordinate to get the three-dimensional coordinates which meets the needs of the conditions of three-dimensional reconstruction, and the 3D architectural model is rebuilt.