期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2010
卷号：XXXVIII - Part 5
页码：11-16
出版社：Copernicus Publications
摘要：The use of TLS application for forecasting of possible rock falls is the main aim of this research, whose intermediate steps have been already presented in previous publications. Through some experiences carried out in monitoring of a few rock faces in Italian Prealps, the whole process to extract changes and to detect deformations of their shape along time is outlined. All the steps of the processing pipeline are here described. First, problems concerning setting up of the reference system, data acquisition and reduction of georeferencing errors are analyzed. Second, the use of a low-cost NIR camera integrated to a terrestrial laser scanner for filtering out vegetation from point clouds is proposed and a test presented. Finally two algorithms able to automatically recognize changes (i.e. rock mass detached) and deformations between surfaces acquired at different epochs are presented and discussed
