矢量切割倾斜摄影三维模型的单体化技术研究

Research on the monomer technology of oblique photography three-dimensional model based on vector cutting

针对倾斜摄影技术生产的三维模型是一个连续的整体,不能实现特定对象的单独管理和应用的问题,该文在分析了当前几种主流的单体化方法的基础上,提出了一种以矢量边界为基线,对倾斜三维模型进行物理切割的单体化方法。该方法以矢量多边形边界为基线,以三维模型为研究对象,从相交判断、基于TIN的切割和修正、基于纹理的切割和修正以及自动单体化软件设计4个方面进行了关键技术研究。经过实验和结果分析,算法的逻辑正确可行,运算效率较高,在面对大面积的三维模型时,健壮性和可靠性也得到了验证,是一种更加完善和更加自动的,能实现较快速度的单体分离,能积极促进倾斜摄影三维成果更加广泛应用的单体化方法。

In view of the fact that the three-dimensional model produced by oblique photography is a continuous whole and cannot be managed and applied separately for specific objects, this paper analyzes several mainstream monomer methods, and proposes a method of physical cutting the three-dimensional model based on vector boundary. Taking the boundary of vector polygon as the baseline and 3 D model as the research object, the key technologies of intersection judgment, tin based cutting and correction, texture based cutting and modification and automatic monomer software design are studied. After the experiment and result analysis, the logic of the algorithm is correct and feasible, and the operation efficiency is high. In the face of large-scale 3 D model, the robustness and reliability are also verified. It is a more perfect and more automatic monomer separation method, which can realize fast monomer separation and actively promote the wide application of 3 D oblique photography results.