Abstract
Abstract. During the recent years it has become obvious that 3D technology, applied mainly with the use of terrestrial laser scanners (TLS) is the most suitable technique for the complete geometric documentation of complex objects, whether they are monuments or architectural constructions in general. However, it is rather a challenging task to convert an acquired point cloud into a realistic 3D polygonal model that can simultaneously satisfy high resolution modeling and visualization demands. The aim of the visualization of a simple or complex object is to create a 3D model that best describes the reality within the computer environment. This paper is dedicated especially in the visualization of a complex object's 3D model, through high, as well as low resolution textured models. The object of interest for this study was the Almoina (Romanesque) Door of the Cathedral of Valencia in Spain.
Highlights
While the generation of digital surface models has a long tradition and has evoked efficient solutions, the correct modeling of closed surfaces or free-form objects is of recent nature, a not completely solved problem and still an important issue investigated in many research activities (Remondino, 2003)
Via a texture rendering process, which is based on a projection that is defined between the partial models and the constrained mesh, the texture of the original images is transferred to the texture map of the constrained mesh
The results can be delivered in different kinds of highly portable formats such as OBJ, VRML, 3DS etc. and there is a significant increase in the range of applications and software that can accept the final 3D textured models as input
Summary
While the generation of digital surface models has a long tradition and has evoked efficient solutions, the correct modeling of closed surfaces or free-form objects is of recent nature, a not completely solved problem and still an important issue investigated in many research activities (Remondino, 2003). In order to fully document an object, contemporary photogrammetric tools combining terrestrial laser scanning data and digital photogrammetry can be used to yield detailed photorealistic models. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXVIII-5/W16, 2011 ISPRS Trento 2011 Workshop, 2-4 March 2011, Trento, Italy and two cameras: one DSLR high resolution and one simple, compact camera. This type of terrestrial laser scanners is not the most appropriate for these cases of highly detailed objects, the results of the final models are considered satisfactory (Stathopoulou et al 2010)
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