ABSTRACT:The paper aims at presenting some results of a point cloud-based survey carried out through integrated methodologies based on active and passive 3D acquisition techniques for processing 3D models. This experiment is part of a research project still in progress conducted by an interdisciplinary team from the School of Architecture and Design of Ascoli Piceno and funded by the University of Camerino. We describe an experimentation conducted on the convent of San Francesco located in Monterubbiano town center (Marche, Italy). The whole complex has undergone a number of substantial changes since the year of its foundation in 1247. The survey was based on an approach blending range-based 3D data acquired by a TOF laser scanner and image-based 3D acquired using an UAV equipped with digital camera in order to survey some external parts difficult to reach with TLS. The integration of two acquisition methods aimed to define a workflow suitable to process dense 3D models from which to generate high poly and low poly 3D models useful to describe complex architectures for different purposes such as photorealistic representations, historical documentation, risk assessment analyses based on Finite Element Methods (FEM).
ABSTRACT:We present the results of a point-cloud-based survey deriving from the use of image-based techniques, in particular with multi-image monoscopic digital photogrammetry systems and software, the so-called "structure-from-motion" technique. The aim is to evaluate the advantages and limitations of such procedures in architectural surveying, particularly in conditions that are "at the limit". A particular case study was chosen: the courtyard of Palazzo dei Capitani del Popolo in Ascoli Piceno, Italy, which can be considered the ideal example due to its notable vertical, rather than horizontal, layout. In this context, by comparing and evaluating the different results, we present experimentation regarding this single case study with the aim of identifying the best workflow to realise a complex, articulated set of representations-using 3D modelling and 2D processing-necessary to correctly document the particular characteristics of such an architectural object.
Abstract-The present paper describes the initial results of the research "Integrated informative models to identify, appreciate and share urban and environmental heritage. Testing 3D interfaces for "cultural and geographic objects": architecture of information and computerized architecture". The main purpose of this research is to expand the concept of "integrated informative models" by studying integrations and overlaps from different environments, taking into consideration both geographical (3D GIS) and web (3D Web and 3D WebGIS) space as well as Virtual Reality (VR) and Augmented Reality (AR). The research aims at identifying technological, procedural and operational systems, structured specifically for each individual case, to define technology with easily accessible (cheap and/or open source) instruments characterized by reliable data processing. Within this framework, various experimentations have been carried out on the area we were privileged to work in, the historical centre of Ascoli Piceno, using different paths/measuring scales and following the necessary organization of data.
<p><strong>Abstract.</strong> The paper aims to investigate the possibilities of using the panorama-based VR to survey data related to that set of activities for planning and management of urban areas, belonging to the Smart Cities strategies. The core of our workflow is to facilitate the visualization of the data produced by the infrastructures of the Smart Cities. A graphical interface based on spherical panoramas, instead of complex three-dimensional could help the user/citizen of the city to better know the operation related to control units spread in the urban area. From a methodological point of view three different kind of spherical panorama acquisition has been tested and compared in order to identify a semi-automatic procedure for locating homologous points on two or more spherical images starting from a point cloud obtained from the same images. The points thus identified allow to quickly identify the same hot-spot on multiple images simultaneously. The comparison shows how all three systems have proved to be useful for the purposes of the research but only one has proved to be reliable from a geometric point of view to identify the locators useful for the construction of the virtual tour.</p>
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