具有先验信息的地面三维激光扫描地形测量数据去噪算法
首发时间:2011-07-01
摘要:为了防止三维激光扫描数据中的噪声对实景重构造成扭曲,基于消噪的相关理论与现有方法,本文提出了三种具有先验信息的去噪算法,利用高程注记点所提供的先验信息作为去噪依据,分别对比高程插值、最小二乘拟合平面及趋势面,选取适当阈值消去噪声。为证明可行性,本文利用Timble GX200地面三维激光扫描系统获取的地形测量数据进行实验分析。试验结果表明,高程注记点可以作为先验信息为点云去噪提供依据,并确保去噪后基本符合实体特征。
关键词: 地面三维激光扫描 噪声去除 先验信息 高程插值 拟合平面 趋势面
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Noise Elimination Algorithms for Terrestrial 3D Laser Scanning Data with Priori Information
Abstract:In order to avoid the distorting of the real reconstruction, and based on the relative theory of noise removing, some research are taken and three algorithms are presented on noise elimination algorithms for terrestrial 3D laser scanning data with priori information in this paper. Based on points labled with height, various index are compared: elevation of Interpolation, fitting plane or trend surface based on Least-square method, then chose proper threshold to eliminate noise. To prove the feasibility of noise elimination algorithms, experiments are taken, and the outcome indicates that points labled with height can be used as standard of noise elimination for the entity features are well preserved.
Keywords: terrestrial 3D Laser Scanning noise elimination priori-Information elevation interpolation planner fitting trend surface
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