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：2005
卷号：XXXVI-5/W17
出版社：Copernicus Publications
摘要：The plenty of works presented in last two years about the use of 3D models in the field of Cultural Heritage witness the great interest of surveyors, engineers, architects and archaeologists towards the laser scanning technique as an invaluable surveying mean for as- built documentation, digital archiving and restoration of important elements belonging to our historical and cultural heritage. Usually, the end products are represented by VR models (Vrml, Flash), suited to be shared among different user across the Internet, stunning movies (Avi, Mpeg, Divx), showing the 3D geometry of various objects , even phisically located in remote sites, embedded in a unique virtual environment, textured DSMs (Digital Surface Models) of both large and small size artistical pieces (e.g. churches, ancient buildings, statues, basrelieves, etc.) and orthophotos. Beside these products, Virtual Restoration applications should be taken into account so as, lately, the Solid Image, a new way for the interactive exploration of 3D models. Such wide variety of applications demonstrate that 3D models allow the user to retrieve different information contents from a unique digital representation of the reality, what is a topic not yet fully investigated. As contribute to the topic of information retrivial from laser scanning-based 3D models, in this paper we will show how a 3D model can be used even for structural analysis applications. To this aim the walls surrounding Montagnana, an ancient little city located 35 km south west of Padua, have been surveyed with combined techniques: reflectorless total station and GPS for establishing a local network, Leica HDS 3000 laser scanner for the generation of a 3D model of the walls. Acquired point clouds were then registered in Cyclone employing retroreflective target to strength the alignment results , which were compared with the ones obtained by the application of Procustes Analysis algorithms, in order to verify the effectiveness of such registration method. Afterthat cross sections have been extracted from the global 3D model, where wall tickness and shape variation were clearly visib le, for the FEM based structural analysis
关键词：3D modeling; cultural heritage; procustes analysis; structural analysis
