| 基于RANSAC算法的隧道点云横断面提取 |
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| 引用本文： | 丁鸽,燕立爽,彭健,朱传广,黄雪亭.基于RANSAC算法的隧道点云横断面提取[J].测绘通报,2021,0(9):120-123. |
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| 作者姓名： | 丁鸽 燕立爽 彭健 朱传广 黄雪亭 |
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| 作者单位： | 济南市勘察测绘研究院, 山东 济南 250013 |
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| 摘 要： | 针对最小二乘法对所有点（包括"局外点"）拟合难以得到最佳线性参数的问题，本文基于RANSAC算法对观测值随机抽样进行参数估算，判断符合模型的"内部点"为一致集，并通过迭代得到足够的一致集，最后设计试验验证该算法的适用性；对隧道点云采用基于中轴线方法进行边界提取，以及三维激光扫描用于生产实践提供参考意义。
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| 关 键 词： | 三维激光扫描 最小二乘法 随机采样一致性 横断面点云 特征提取 |
| 收稿时间： | 2021-03-11 |
| 修稿时间： | 2021-07-22 |
Cross section extraction of tunnel point cloud based on ransac algorithm |
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| DING Ge,YAN Lishuang,PENG Jian,ZHU Chuanguang,HUANG Xueting.Cross section extraction of tunnel point cloud based on ransac algorithm[J].Bulletin of Surveying and Mapping,2021,0(9):120-123. |
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| Authors: | DING Ge YAN Lishuang PENG Jian ZHU Chuanguang HUANG Xueting |
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| Institution: | Jinan Institute of Surveying and Mapping Survey, Jinan 250013, China |
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| Abstract: | Because it is difficult to get the best linear parameters by least square method by fitting all points, including "outliers", this paper presents a method based on RANSAC algorithm to estimate the parameters by random sampling the observed values, the "inner point" of the model is a consistent set until a sufficient consistent set is obtained under a certain number of iterations. The boundary of tunnel point cloud is extracted based on the method of central axis, which provides a reference for the application of 3D laser scanning in production. |
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| Keywords: | 3D laser scanning least squares random sampling consistency cross-sectional point cloud feature extraction |
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