| 利用层间连接和平滑策略重建屋顶三维模型 |
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| 引用本文： | 许浩,程亮,伍阳.利用层间连接和平滑策略重建屋顶三维模型[J].测绘通报,2020,0(6):104-110. |
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| 作者姓名： | 许浩 程亮 伍阳 |
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| 作者单位： | 1. 中国电子科技集团公司第二十八研究所, 江苏 南京 210007;2. 南京大学, 江苏 南京 210023 |
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| 基金项目： | 国家自然科学基金（41622109；41371017） |
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| 摘 要： | 面向数字城市和智慧城市建设急需城市建筑三维模型支撑的需要，本文基于机载LiDAR数据，以“顾及平整性的屋顶面片分割—屋顶层间连接—三维模型重建”为脉络，提出了一种采用层间连接和平滑策略的建筑屋顶三维模型重建方法。在屋顶面片提取过程中，充分顾及了屋顶面片的平整性；并在屋顶面片平整基础上，提出层间连接点的概念，以实现高效、快速的模型重建工作。试验部分，本文从屋顶面片重建完整率与正确率、重建几何精度及建筑物高程对于重建的影响3个方面作了较为详尽的评价与分析，并在国际摄影测量与遥感学会标准数据集支撑下，与国际同行进行试验对比。试验结果表明，建筑屋顶重建的完整率和正确率分别达到90%和95%；在偏移距离评价方面，平均偏移距离和标准差最优分别达0.05 m和0.18 m。因此，本文方法可有效完成建筑屋顶三维模型重建，重建模型准确度高、完整性好。
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| 关 键 词： | 机载LiDAR 三维重建 面片分割 面片平滑 建筑屋顶 |
| 收稿时间： | 2019-07-29 |
Building roof reconstruction from airborne LiDAR data based on layer connection and smoothness strategy |
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| XU Hao,CHENG Liang,WU Yang.Building roof reconstruction from airborne LiDAR data based on layer connection and smoothness strategy[J].Bulletin of Surveying and Mapping,2020,0(6):104-110. |
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| Authors: | XU Hao CHENG Liang WU Yang |
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| Institution: | 1. The 28 th Research Institute of China Electronics Technology Group Corporation, Nanjing 210007, China;2. Nanjing University, Nanjing 210023, China |
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| Abstract: | For providing 3D building models to construct digital and smart cities, an approach, which uses smoothness strategy and layer connection based on airborne LiDAR data proposed for automatically reconstructing 3D building roof models with precise position and details. It consists of four steps: building roof point extraction, building rooftop patch segmentation, connection between roof layers and 3D building roof model reconstruction. Building roof points are firstly extracted from airborne LiDAR data using the reversed iterative mathematic morphological algorithm and the density-based method. In the process of rooftop patch extraction, the smoothness of the rooftop patch is taken into consideration. The concept of layer-connection-point is proposed to complete building model reconstruction effectively and fast after obtaining the smooth rooftop patches. Experiments are analyzed from several aspects: the completeness and correctness, deviation analysis of the reconstructed building roofs, and the influence of elevation to 3D model roof reconstruction supported by the ISPRS standard data set, compared with the international similar experiment. According to the experimental results, the completeness and correctness of the roof reconstruction results are 90% and 95%, respectively. The average deviation distance and standard deviation are 0.05 and 0.18 m, respectively. The experimental results demonstrate promising correctness, completeness, and deviation accuracy, with a satisfactory 3D building roof models. |
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| Keywords: | airborne LiDAR 3D roof model reconstruction rooftop patch segmentation rooftop patch smoothing building roof |
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