基于结构化场景的单幅图像建筑物三维重建

针对无法利用激光扫描或多张图像实现三维重建的已损或不复存在的建筑,本文提出了一种基于结构化场景的单张图像建筑物三维重建方法。该方法先基于RANSAC算法及最小距离法分别解算灭点直线和灭点;然后基于平行平面、包含平行信息的任意平面和包含垂直信息的任意平面的平面模型解算三维坐标。本文以现存某高校图书馆为例,重建了三维模型,并分析了模型精度。结果表明,重建误差最小为0,最大为5.8%,模型整体精度在1.9%左右,符合三维重建精度要求。在四川省白鹿领报修院教堂的三维重建应用中,建立了已损建筑物的三维模型,获得了较好的重建效果。该方法适用于包含平行、垂直、灭点和平面结构的建筑物场景,可得到建筑物三维几何线框模型,几何细节采用纹理映射替代,可应用于现存建筑和文化遗存遗址的三维重建。

A Single View Type 3D Reconstructive Method for Architecture Based on Structured Scene

For the damaged or disappeared buildings which cannot be reconstructed by laser scanning technique or from multi-pictures, this paper proposed a method for the single view architecture's reconstruction based on the structured scene. Firstly, the vanishing lines and vanishing points were calculated and extracted based on the RANSAC algorithm and minimum distance method. Then, their three dimensional coordinates were calculated from the parallel plane or any plane that contains the parallel lines or vertical lines. Experiments were undertaken to evaluate the validities of the proposed method with two datasets, one of which is featured by a university's library and the other is the Sichuan Bailu Lingbao Seminary Church. The minimum reconstruction error of the university library is 0 while the maximum is 5.8%, and the overall accuracy is about 1.9%, which satisfies the accuracy requirement. At the same time, this method was applied for reconstructing the damaged buildings, which provides a good reconstruction result for Sichuan Lingbao Seminary Church's three dimensional reconstruction and modeling. This method is applicable to building scenarios containing the parallel, perpendicular, vanishing point and plane structure, which is used to obtain the three-dimensional geometric wireframe building model. Furthermore, the geometric details are replaced by texture mapping. This method also can be applied to the three-dimensional reconstruction of the existing buildings and ancient cultural relics.