| 基于倾斜影像的城市场景隐式曲面重建 |
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| 引用本文： | 左志强,黄先锋,杨冲,张帆,高云龙.基于倾斜影像的城市场景隐式曲面重建[J].测绘通报,2017,0(12):21-28. |
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| 作者姓名： | 左志强 黄先锋 杨冲 张帆 高云龙 |
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| 作者单位： | 1. 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉 430079;2. 武汉大学遥感信息工程学院, 湖北 武汉 430079 |
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| 摘 要： | 在基于倾斜影像的城市场景重建过程中，由于获取影像时存在场景遮蔽和大视点变化的情况，建筑物立面等区域存在着影像密集匹配点云稀疏甚至空洞的情况，自动化重建难度大，难以反映建筑物的真实形态。本文提出了一种新的基于倾斜影像的城市场景隐式曲面重建方法：首先，以倾斜影像密集匹配点云为基础建立Delaunay四面体；然后，对Delaunay四面体进行约束图割，提取出可视化的三角面，进而更加精确地估计点云的法向信息；最终，结合Screened Poisson曲面重建，实现了城市场景的隐式曲面重建。通过多种隐式曲面重建方法的对比试验，验证了本方法的准确性和适用性。
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| 关 键 词： | 倾斜影像 隐式曲面重建 光线 图割 Screened Poisson曲面重建 |
| 收稿时间： | 2017-03-16 |
Implicit Surface Reconstruction of Urban Scenes Based on Oblique Images |
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| ZUO Zhiqiang,HUANG Xianfeng,YANG Chong,ZHANG Fan,GAO Yunlong.Implicit Surface Reconstruction of Urban Scenes Based on Oblique Images[J].Bulletin of Surveying and Mapping,2017,0(12):21-28. |
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| Authors: | ZUO Zhiqiang HUANG Xianfeng YANG Chong ZHANG Fan GAO Yunlong |
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| Institution: | 1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;2. School of Remote Sensing Information Engineering, Wuhan University, Wuhan 430079, China |
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| Abstract: | In the process of urban scenes reconstruction based on oblique images , due to the scenes occlusion and large view-point changes in oblique imagery acquisition ,dense image matching is quite challenging in scenarios like building facades and other vertical objects,leading to a sparse or leaky point cloud and can be hard to reconstruct the urban scenes precisely .A new urban scenes implicit surface reconstruction method is proposed based on oblique images .Firstly,it builds an adaptive tetrahedral decomposition of space by computing 3D Delaunay triangulation of the dense point cloud .Secondly,a triangular mesh is generated using the graph cut algorithm on Delaunay tetrahedron to make a more accurate estimation of the normal information of the point cloud .Finally,combined with Screened Poisson surface reconstruction method ,an implicit surface reconstruction is conducted for the urban scenes .Experiments and comparison with other three implicit reconstruction methods show the accuracy and applicability of the proposed method . |
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| Keywords: | oblique images implicit surface reconstruction ray graph cut Screened Poisson surface reconstruction |
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