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检索条件"任意字段=Conference on 3D Virtual Reconstruction and Visualization of Complex Architectures"

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RECREATING CULTURAL HERITAGE ENVIRONMENTS FOR VR USING PHOTOGRAMMETRY 8

RECREATING CULTURAL HERITAGE ENVIRONMENTS FOR VR USING PHOTO...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： dhanda, A. Ortiz, M. Reina Weigert, A. Paladini, A. Min, A. Gyi, M. Su, S. Fai, S. Quintero, M. Santana Carleton Univ CIMS Ottawa ON Canada Katholieke Univ Leuven RLICC Leuven Belgium Dept Archaeol & Natl Museum Bagan Myanmar Mandalay Technol Univ Mandalay Myanmar

In this paper, we propose a workflow for recreating places of cultural heritage in virtual Reality (VR) using structure from motion (SfM) photogrammetry. The unique texture of heritage places makes them ideal for full photogrammetric capture. An optimized model is created from the photogrammetric data so that it is small enough to render in a real-time environment. The optimized model, combined with mesh maps (texture maps, normal maps, etc.) looks like the original high detail model. The capture of a whole space makes it possible to create a VR experience with six degrees of freedom (6doF) that allows the user to explore the historic place. Creating these experiences can bring people to cultural heritage that is either endangered or too remote for some people to access. The workflow described in this paper will be demonstrated with the case study of Myin-pya-gu, an 11th century temple in Bagan, Myanmar.

关键词： virtual Reality Photogrammetry Physically Based Rendering Cultural Heritage Bagan

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ACCURACY EVALUATION OF A MOBILE MAPPING SYSTEM WITH AdVANCEd STATISTICAL METHOdS 6

ACCURACY EVALUATION OF A MOBILE MAPPING SYSTEM WITH ADVANCED...

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conference on 3d-Arch 2015 - 3d virtual reconstruction and visualization of complex architectures

作者： Toschi, I. Rodriguez-Gonzalvez, P. Remondino, F. Minto, S. Orlandini, S. Fuller, A. Bruno Kessler Fdn FBK Opt Metrol Unit 3D 3DOM Trento Italy Univ Salamanca High Sch Avila Dept Cartog & Land Engn Avila Spain Microgeo Florence Italy RIEGL Vienna Austria

ISBN: (纸本)9781629935201

This paper discusses a methodology to evaluate the precision and the accuracy of a commercial Mobile Mapping System (MMS) with advanced statistical methods. So far, the metric potentialities of this emerging mapping technology have been studied in few papers, where generally the assumption that errors follow a normal distribution is made. In fact, this hypothesis should be carefully verified in advance, in order to test how well the Gaussian classic statistics can adapt to datasets that are usually affected by asymmetrical gross errors. The workflow adopted in this study relies on a Gaussian assessment, followed by an outlier filtering process. Finally, non-parametric statistical models are applied, in order to achieve a robust estimation of the error dispersion. Among the different MMSs available on the market, the latest solution provided by RIEGL is here tested, i.e. the VMX-450 Mobile Laser Scanning System. The test-area is the historic city centre of Trento (Italy), selected in order to assess the system performance in dealing with a challenging and historic urban scenario. Reference measures are derived from photogrammetric and Terrestrial Laser Scanning (TLS) surveys. All datasets show a large lack of symmetry that leads to the conclusion that the standard normal parameters are not adequate to assess this type of data. The use of non-normal statistics gives thus a more appropriate description of the data and yields results that meet the quoted a-priori errors.

关键词： Mobile Accuracy Precision Statistic Terrestrial Photogrammetry Laser scanning

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AUTOMATING THE VERIFICATION OF HERITAGE BUILdING INFORMATION MOdELS CREATEd FROM POINT CLOUd dATA 8

AUTOMATING THE VERIFICATION OF HERITAGE BUILDING INFORMATION...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Macher, H. Chow, L. Fai, S. INSA Strasbourg Photogrammetry & Geomat Grp ICube Lab UMR 7357 Strasbourg France Carleton Univ Azrieli Sch Architecture & Urbanism Carleton Immers Media Studio Ottawa ON Canada

The use of remote sensors to acquire metric information for building information modelling (BIM) of heritage buildings is now common. Problematically, the creation of models from that information is still largely a manual and non-quantifiable process. As a result, a key aspect of the scan-to-BIM process is verification of the accuracy of the model in relation to the metric information. The most common method to check a model element constructed from a point cloud seems to be the analysis of deviations between this element and the corresponding point cloud (Anil et al., 2013;Tang et al., 2011). It is comprised of three main steps: the computation, the visualisation and the analysis of deviations. The verification process is particularly onerous for large-scale buildings where it is necessary to ensure that all elements of a model are consistent with metric data that may come from diverse sources (Chow and Fai, 2017). In this paper, we discuss the development of a plug-in for Autodesk Revit that automates this verification process.

关键词： 3d analysis as-built BIM model checking point clouds deviations walls

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REPRESENTATION OF SYNTHETIC SHAdOWS ON 3d dIGITAL MOdELS FOR THE VOLUMETRIC INTERPRETATION ON CONCAVE-CONVEX ARCHAEOLOGICAL ARTIFACTS 8

REPRESENTATION OF SYNTHETIC SHADOWS ON 3D DIGITAL MODELS FOR...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Garcia-Fernandez, J. Medeiros, L. Pernao, J. Univ Lisbon Fac Arquitetura Lisbon Portugal Univ Nova Lisboa Fac Ciencias Sociais & Humanas Lisbon Portugal

The representation of archaeological artefacts aims for the graphic description of relevant information from the object, to allow for the proper interpretation of evidences from the past. Concavities and convexities are elements often difficult to represent through classical (analogical) representation techniques, especially when these geometrical characteristics are neither continue nor parameterizable. digital techniques have advanced on the accurate reconstruction of 3d shapes, while attaching real colour to the geometry. However, the perception of concave/convex shapes from photorealistic true-orthoimages continues to be limited, especially when rich and homogeneous textures camouflage slight slope changes or volumetric deformations. In this paper we first critically review the current practice on the representation of solid-of-revolution artefacts with concave-convex predominance, and alternative photorealistic representations aiming at a better understanding of volume and colour. Given the limitation targeted, we then propose a workflow for the creation of true-orthometric maps enhanced by customized shadows. The work-flow integrates considerations on: (i) The orientation of archaeological artefact;(ii) the creation of accurate orthometric images based on digital photogrammetry techniques;and (iii) the application of synthetic attached and cast shadows according the shape (information) to be represented. The workflow is demonstrated with a sample of plates retrieved from the Rua-das-Madres archaeological site, in Portugal.

关键词： Representation Interpretation Archaeology Shadows 3d modelling

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THE VALUE OF KNOWLEdGE THROUGH H-BIM MOdELS: HISTORIC dOCUMENTATION WITH A SEMANTIC APPROACH 8

THE VALUE OF KNOWLEDGE THROUGH H-BIM MODELS: HISTORIC DOCUME...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Parisi, P. Lo Turco, M. Giovannini, E. C. Politecn Torino DAD Turin Italy

The Building Information Modeling (BIM) in the Architectural Heritage field is constantly proving to be a fertile ground for the experimentation of innovative systems for the enhancement and management of cultural heritage. Regarding to the management of the entire process, the building field is increasing in efficiency from the construction to the management phase;conversely, the approach to historical buildings opens up interesting and heterogeneous scenarios, according to different levels of complexity. The presented work is the result of a collaboration between the Politecnico di Torino and the Escuela Tecnica Superior de Arquitectura of Granada: the main scope was to create an historic building information model (H-BIM) of the building that today hosts the Faculty of Architecture (ETSAG), taking into account its historical past from the sixteenth century up to the present day, as the result of many modifications, extensions and different use classifications over time. According to this, the BIM methodology can be considered as a bridge between the archive documentation and the digital model, proving to be an effective tool as a data repository, semantically oriented, not only constituted by geometry, but also by alpha-numerical attributes, improving in effectiveness if it is directly related to formal language object oriented.

关键词： 3d Modelling data Modeling HBIM Paradata documentation CIdOC-CRM

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AN IMAGE-BASEd MOdELING EXPERIENCE ABOUT SOCIAL FACILITIES, BUILT dURING THE FASCIST PERIOd IN MIddLE ITALY 4

AN IMAGE-BASED MODELING EXPERIENCE ABOUT SOCIAL FACILITIES, ...

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4th ISPRS International Workshop 3d-ARCH - 3d virtual reconstruction and visualization of complex architectures

作者： Rossi, d. Univ Camerino Scuola Architettura & Design E Vittoria I-62032 Camerino Italy

The main focus of this article is to explain a teaching activity. This experience follows a research aimed to testing innovative systems for formal and digital analysis of architectural building. In particular, the field of investigation is the analytical drawing. An analytical draw allows to develope an interpretative and similar models of reality;these models are built using photomodeling techniques and are designed to re-mTite modern and contemporary architecture. The typology of the buildings surveyed belong to a cultural period, called Modern Movement, historically placed between the two world wars. The Modern Movement aimed to renew existing architectural principle and to a functional redefinition of the same one. In Italy these principles arrived during the Fascist period. Heritage made up of public social buildings (case del Balilla, GIL., recreation center...) built during the fascist period in middle Italy is remarkable for quantity and in many cases for architectural quality. This kind of buildings arc composed using pure shapes: large cube (gyms) alternate with long rectangular block containing offices creates compositions made of big volumes and high towers. These features are perfectly suited to the needs of a surveying process by photomodeling where the role of photography is central and where there is the need to identify certain and easily distinguishable points on all picture, leaning on the edges of the volume or lininig on the texture discontinuity. The goal is the documentation to preserve and to develop buildings and urban complexes of modern architecture, directed to encourage an artistic preservation.

关键词： Modeling reconstruction visualization Heritage documentation Image-based modeling Survey

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3d CAMERAS ACQUISITIONS FOR THE dOCUMENTATION OF CULTURAL HERITAGE 8

3D CAMERAS ACQUISITIONS FOR THE DOCUMENTATION OF CULTURAL HE...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Pulcrano, M. Scandurra, S. Minin, G. di Luggo, A. Univ Naples Federico II Dept Architecture DIARC Naples Italy Ingeo Srl Naples Italy

Photography has always been considered as a valid tool to acquire information about reality. Nowadays, its versatility, together with the development of new techniques and technologies, allows to use it in different fields of application. Particularly, in the digitization of built heritage, photography not only enables to understand and document historical and architectural artifacts but also to acquire morphological and geometrical data about them with automated digital photogrammetry. Nowadays, photogrammetry enables many tools to give virtual casts of reality by showing it in the way of point cloud. Although they can have metric reliability and visual quality, traditional instruments - such as monoscopic cameras - involve a careful planning of the campaign phase and a long acquisition and processing time. On the contrary, the most recent ones, based on the integration of different sensors and cameras, try to reduce the gap between time and results. The latter include some systems of indoor mapping who, thanks to 360 degrees acquisitions and SLAM technology, reconstruct the original scene in real time in great detail and with a photorealistic rendering. This study is aimed at reporting a research evaluating metric reliability and the level of survey detail with a Matterport Pro2 3d motorized rotating camera, equipped with SLAM technology, whose results have been compared with point clouds obtained by image-based and range-based processes.

关键词： spherical photogrammetry indoor mapping SLAM RGB-d data accuracy comparison

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3d ANd 4d MOdELLING IN BUILdING SITE WORKING CONTROL 8

3D AND 4D MODELLING IN BUILDING SITE WORKING CONTROL

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Lucarelli, M. Laurini, E. de Berardinis, P. Univ Aquila Dept Civil Architectural Construct & Environm Eng Laquila Italy

The purpose of this contribution is to describe the use of the HBIM method for the management of the restoration building site applied to a historic building in the heart of the historic center of L'Aquila. The construction is located in a densely constructed area and it is characterized by a high spatial complexity with various types of limitations including: small external and internal spaces and interferences due to neighboring construction sites. The proposed method involves a particularly detailed organization of the construction site, simultaneously planning both the development of the working and the safety in order to have more transparency and more control of the information shared among stakeholders. This method consists in planning the Gantt diagram from general to detailed level, according to certain parameters that will be cross-examined and checked regurarly. A screening step has been carried out regarding the current situation, the proceedings to be undertaken and the stakeholders to be included. Thank to this, it has been possible to have automated processes to control not only geometrical interferences but also the ones related to the completion of the work in the interest of enhancing the risk management. due to a 3d and 4d BIM modelling, there are been found advanced layouts and some timeliners that have allowed a rigourus control of the building process, particularly in the case of precise working and potencial changes that are common in building sites of this type.

关键词： building site historic center safety 4d management advanced layout hbim

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dETECTION ANd PURGING OF SPECULAR REFLECTIVE ANd TRANSPARENT OBJECT INFLUENCES IN 3d RANGE MEASUREMENTS

DETECTION AND PURGING OF SPECULAR REFLECTIVE AND TRANSPARENT...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Koch, R. May, S. Nuechter, A. Tech Hsch Nurnberg Georg Simon Ohm Kesslerpl 12 D-90489 Nurnberg Germany Julius Maximilians Univ Wurzburg Informat Robot & Telemat 7 D-97074 Wurzburg Germany

3d laser scanners are favoured sensors for mapping in mobile service robotics at indoor and outdoor applications, since they deliver precise measurements at a wide scanning range. The resulting maps are detailed since they have a high resolution. Based on these maps robots navigate through rough terrain, fulfil advanced manipulation, and inspection tasks. In case of specular reflective and transparent objects, e.g., mirrors, windows, shiny metals, the laser measurements get corrupted. Based on the type of object and the incident angle of the incoming laser beam there are three results possible: a measurement point on the object plane, a measurement behind the object plane, and a measurement of a reflected object. It is important to detect such situations to be able to handle these corrupted points. This paper describes why it is difficult to distinguish between specular reflective and transparent surfaces. It presents a 3d-Reflection-Pre-Filter Approach to identify specular reflective and transparent objects in point clouds of a multi-echo laser scanner. Furthermore, it filters point clouds from influences of such objects and extract the object properties for further investigations. Based on an Iterative-Closest-Point-algorithm reflective objects are identified. Object surfaces and points behind surfaces are masked according to their location. Finally, the processed point cloud is forwarded to a mapping module. Furthermore, the object surface corners and the type of the surface is broadcasted. Four experiments demonstrate the usability of the 3d-Reflection-Pre- Filter. The first experiment was made in a empty room containing a mirror, the second experiment was made in a stairway containing a glass door, the third experiment was made in a empty room containing two mirrors, the fourth experiment was made in an office room containing a mirror. This paper demonstrate that for single scans the detection of specular reflective and transparent objects in 3d is possible. It

关键词： Robotics 3d laser scanning Measurement Error detection Segmentation Correction Algorithms

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FAST INdOOR MAPPING TO FEEd AN INdOOR dB FOR BUILdING ANd FACILITY MANAGEMENT 8

FAST INDOOR MAPPING TO FEED AN INDOOR DB FOR BUILDING AND FA...

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8th International Workshop on 3d virtual reconstruction and visualization of complex architectures (3d-ARCH)

作者： Cantoni, Stefano Vassena, Giorgio Univ Brescia DICATAM Brescia Italy

Facility Management activities require to collect and organize a large amount of information about a building as, for example, geometry, MEP structures, lighting and antifire devices, typologies of furniture, paving characteristics, structures and more. Nowadays the data acquisition procedures for indoor environments are usually still carried on with old style approach, where surveyors have to manually map and acquire the data, walking along the sites with a poor level of digitalization The success story presented in the paper describes how using an Indoor Mobile Mapping approach (Zlot et al., 2014), it is possible to satisfy the need to acquire plant views of a large parts of buildings and, simultaneously, to record a 3d+Full resolution RGB images. Thanks to this fast acquisition it is later possible to feed a 2d/3d database, identifying the main objects needed to support a facility management process.. The iMMS that has been used is based on SLAM approach, that allows the user to map and survey large sites also indoor, that means without the presence of GNSS signal and without the use of accurate and expense IMU devices. The data acquired in the field has been process with standard/commercial software that is usually used to create dB for outdoor mobile mapping.

关键词： 3d Survey Mobile Mapping System SLAM Laser Scanner Spherical Images Point Cloud Facility Management

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