一种大规模倾斜摄影模型三维可视化方案

发布时间：2018-06-26 12:07

本文选题：倾斜摄影模型 + 网格简化　；参考：《测绘通报》2017年04期

【摘要】：提出了一种基于四叉树结构的大规模倾斜摄影模型三维可视化方案:首先采用二次误差测度(QEM)的半边折叠算法对三角网格模型进行分层几何简化;然后对分层简化的模型进行纹理映射和分块,分块结果采用Morton编码命名;最后将场景按金字塔结构进行LOD(多细节层次结构)组织。选取某一试验区域的真实倾斜模型数据进行了试验,结果表明,该方案能依据模型在计算机屏幕上所占的像素大小,动态加载倾斜模型数据,完成大规模场景的实时可视化。
[Abstract]:In this paper, a 3D visualization scheme of large-scale tilt photography model based on quadtree structure is proposed. Firstly, the semi-edge folding algorithm based on quadratic error measure (QEM) is used to simplify the triangular mesh model. Then the hierarchical simplified model is mapped and partitioned, and the result is named by Morton coding. Finally, the scene is organized into LOD (multi-detail hierarchy) according to the pyramid structure. The experimental results show that the scheme can dynamically load the tilt model data according to the pixel size of the model on the computer screen and realize the real-time visualization of large-scale scene.
【作者单位】：武汉大学测绘学院;武汉大学国家领土主权与海洋权益协同创新中心;中冶建筑研究总院有限公司;国家测绘地理信息局地下管线勘测工程院;
【基金】：国家自然科学基金(41271431)
【分类号】：TP391.41

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