| 一种基于室内点云数据的建筑墙线提取 |
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| 引用本文： | 孙宪龙,韩李涛,周丽娟,郭佳.一种基于室内点云数据的建筑墙线提取[J].测绘工程,2021,30(2):65-71. |
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| 作者姓名： | 孙宪龙 韩李涛 周丽娟 郭佳 |
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| 作者单位： | 山东科技大学 测绘科学与工程学院,山东 青岛 266590;山东科技大学 测绘科学与工程学院,山东 青岛 266590;山东省基础地理信息与数字化技术重点实验室,山东 青岛266590;山东科技大学 测绘科学与工程学院,山东 青岛 266590;山东科技大学 测绘科学与工程学院,山东 青岛 266590 |
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| 基金项目： | 山东省自然科学基金资助项目 |
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| 摘 要： | 针对室内点云数据无结构化属性、数据间无连接、不承载语义信息且数据点密度高的特点,结合建筑物点云几何特征和室内导航需求,通过数据降维简化建筑几何特征提取的复杂性,提出一种基于室内点云数据提取建筑物墙线的方法。该方法首先通过向特定方向投影,利用点云密度直方图完成天花板面、地板面和房间墙面的初步分割;然后将房间墙面点云数据向地面投影,生成点云分布矩阵并将其转化为二值图,利用Hough变换算法提取直线,并利用直线方程求取交点得到备选墙线;最后将备选墙线和墙线点云二值图进行叠加从而获取最终建筑墙线。
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| 关 键 词： | 室内点云 特征提取 建筑墙线 HOUGH变换 |
Research on the extraction method of building wall line based on interior point cloud data |
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| SUN Xianlong,HAN Litao,ZHOU Lijuan,GUO Jia.Research on the extraction method of building wall line based on interior point cloud data[J].Engineering of Surveying and Mapping,2021,30(2):65-71. |
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| Authors: | SUN Xianlong HAN Litao ZHOU Lijuan GUO Jia |
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| Institution: | (College of Geomatics, Shandong University of Science and Technology, Qingdao 266590,China;Key Laboratory of Geomatics and Digital Technology of Shandong Province, Qingdao 266590, China) |
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| Abstract: | According to the characteristics of indoor point cloud data,such as no structural attributes,no connection between data,no semantic information and high data point density,combined with the geometric features of building point cloud and indoor navigation requirements,the complexity of building geometric feature extraction is simplified by data dimensionality reduction.This paper proposes a method to extract wall line of buildings based on indoor point cloud data.This method begins by projecting to a specific direction,and the point cloud density histogram is used to complete the preliminary segmentation of the ceiling surface,floor surface and room wall surface.And the point cloud data of the room wall is projected to the ground,the point cloud distribution matrix is generated and transformed into a binary graph,the Hough transform algorithm is used to extract the line,and the line equation is used to find the intersection point to get the alternative wall line.Finally,the alternative wall line and wall line point cloud binary map are superimposed to obtain the final building wall line. |
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| Keywords: | indoor point cloud feature extraction building wall line Hough transform |
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