Influence of range measurement noise on roughness characterization of rock surfaces using terrestrial laser scanning
Influence of range measurement noise on roughness characterization of rock surfaces using terrestrial laser scanning
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DOI：
10.1016/j.ijrmms.2011.09.007
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发表时间：
2011-12-01
影响因子：
7.2
通讯作者：
Menenti, Massimo
中科院分区：
文献类型：
--
作者：
Khoshelham, Kourosh;Altundag, Dogan;Menenti, Massimo
激光扫描在岩石表面研究中的应用受到激光扫描数据中固有的距离测量噪声的限制。在本文中，我们调查的影响范围测量噪声的量化岩石表面粗糙度。从激光扫描仪的数据得到的粗糙度测量与那些来自手动测量进行了比较。结果表明，距离测量中噪声的存在导致粗糙度轮廓的分形维数和幅值的高估。实验与小波分解和阈值的方法来减少噪声的激光测距数据。结果表明，小波去噪方法一般导致更现实的估计粗糙度的激光轮廓。(C)2011爱思唯尔有限公司保留所有权利。
The application of laser scanning in studying rock surfaces is limited by the range measurement noise inherent in the laser scanner data. In this paper we investigate the influence of range measurement noise on the quantification of rock surface roughness. Roughness measures derived from the laser scanner data are compared with those derived from manual measurements. The comparison shows that the presense of noise in range measurements leads to an overestimation of the fractal dimension and amplitude of roughness profiles. Experiments with wavelet decomposition and thresholding methods for reducing noise in the laser range data are presented. The results indicate that wavelet de-noising methods in general lead to more realistic estimates of the roughness of the laser profiles. (C) 2011 Elsevier Ltd. All rights reserved.