倾斜摄影测量三维模型重建及纹理映射技术研究

Research on 3D Model Reconstruction and Texture Mapping Technology of Oblique Photogrammetry

为获取高精度建筑物三维模型,满足智慧城市基础数据需求,本文在传统倾斜摄影三维建模的基础上,引入渲染到纹理(RTT)概念,提取倾斜摄影三角网模型中的纹理信息,生成精细度更高的无遮挡纹理,然后映射至建筑物三维模型表面,从而完成高精细度三维模型生产作业。通过与传统倾斜摄影三维建模方法进行对比分析,验证了RTT技术方法三维模型纹理映射效果较好,渲染效率较高,且具备完整拓扑语义,尤其是针对存在遮挡的复杂区域,该技术方法纹理组织更为精细,能够为智慧城市提供满足要求的高精细度建筑物三维模型。

In order to obtain high-accuracy building 3D models and meet the basic data requirements of smart cities,this paper introduces the concept of rendering to texture(RTT)on the basis of traditional oblique photogrammetry 3D modeling,extracts the texture information in the oblique photogrammetry triangulation mesh model,generates a higher fineness unobstructed texture,and then maps it to the surface of the 3D model of the buildings to complete the production of high fineness 3D models.Through comparative analysis with the traditional oblique photogrammetry 3D modeling method,it is verified that the texture mapping effect of the 3D model of the RTT technology method is better,the rendering efficiency is higher,and it has completed topological semantics,especially for complex areas with occlusions.This technology method texture is more refined,and it can provide a high fineness three-dimensional model of buildings that meets the requirements for smart cities.