文章基本信息

标题：Structure line modelling based on terrestrial laserscanner data
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作者：C. Briese
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：2006
卷号：XXXVI Part 5
出版社：Copernicus Publications
摘要：In the last years, terrestrial laser scanning (TLS) instruments are gaining more and more importance for the 3D data acquisition for a variety of applications. However, the subsequent modelling procedures are still not standardised for the different applications and often the result of a TLS project is a registered 3D point cloud. This form of object representation is often applicable for visualisation purposes, but for the mathematical analysis of the object, advanced representation forms are essential. For this aim, the meshing of the TLS point cloud is a common procedure. However, it has to be considered that this form of object representation can be directly altered by random, systematic, and gross errors included in the TLS data. Especially discontinuities are usually erroneously due to the complex interaction of the laser beam with the illuminated object surface. Thus, methods that consider possible measurement errors within the process of 3D modelling are essential. Furthermore, an adequate representation of structure lines within the modelling procedure is important for a high quality object representation. For this aim, an explicit description of these linear features is necessary. Therefore, in order to enhance the models generated from a TLS point cloud, this paper focuses on the determination of structure lines. The method is based on a semi-automatic process originally developed for the modelling of breaklines from airborne laser scanner data. Within this paper, the adaptation of the modelling framework to the usage of TLS data is presented. Furthermore, it is extended to further types of structure lines. The modelling framework is based on the irregular distributed TLS point cloud. The usage of a robust estimation procedure together with a sensor specific stochastical model allows the consideration of measurement errors within the structure line modelling procedure. For the modelling concept, an approximation of the line is essential. In order to overcome this limitation the process of structure line growing is introduced. This process allows a semi-automated determination of linear features. Next to this approach, a section with practical examples demonstrates and discusses the capability of the methods. Finally, an outlook into ongoing research work and a summary conclude the paper
关键词：Structure line; Modelling; Semi-automation; Terrestrial Laserscanning; Object; Reconstruction