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

共 1539 条记录，以下是91-100 订阅

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FROM TLS POINT CLOUdS TO 3d MOdELS OF TREES: A COMPARISON OF EXISTING ALGORITHMS FOR 3d TREE reconstruction

FROM TLS POINT CLOUDS TO 3D MODELS OF TREES: A COMPARISON OF...

引用

conference on 3d virtual reconstruction and visualization of complex architectures

作者： Bournez, E. Landes, T. Saudreau, M. Kastendeuch, P. Najjar, G. Univ Strasbourg CNRS INSA Strasbourg ICube LabUMR 7357 Strasbourg France Univ Blaise Pascal UMR547 PIAF Lab INRA Clermont Ferrand Clermont Ferrand France

3d models of tree geometry are important for numerous studies, such as for urban planning or agricultural studies. In climatology, tree models can be necessary for simulating the cooling effect of trees by estimating their evapotranspiration. The literature shows that the more accurate the 3d structure of a tree is, the more accurate microclimate models are. This is the reason why, since 2013, we have been developing an algorithm for the reconstruction of trees from terrestrial laser scanner (TLS) data, which we call TreeArchitecture. Meanwhile, new promising algorithms dedicated to tree reconstruction have emerged in the literature. In this paper, we assess the capacity of our algorithm and of two others - PlantScan3d and SimpleTree- to reconstruct the 3d structure of trees. The aim of this reconstruction is to be able to characterize the geometric complexity of trees, with different heights, sizes and shapes of branches. Based on a specific surveying workflow with a TLS, we have acquired dense point clouds of six different urban trees, with specific architectures, before reconstructing them with each algorithm. Finally, qualitative and quantitative assessments of the models are performed using reference tree reconstructions and field measurements. Based on this assessment, the advantages and the limits of every reconstruction algorithm are highlighted. Anyway, very satisfying results can be reached for 3d reconstructions of tree topology as well as of tree volume.

关键词： Trees Terrestrial Laser Scanner Point Cloud 3d Model reconstruction Algorithm Assessment Accuracy

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INTEROPERABILITY MATTER: LEVELS OF dATA SHARING, STARTING FROM A 3d INFORMATION MOdELLING

INTEROPERABILITY MATTER: LEVELS OF DATA SHARING, STARTING FR...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Tommasi, C. Achille, C. Politecn Milan ABC Dept Survey Grp 3D Milan Italy

Nowadays, the adoption of BIM processes in the AEC (Architecture, Engineering and Construction) industry means to be oriented towards synergistic workflows, based on informative instruments capable of realizing the virtual model of the building. The target of this article is to speak about the interoperability matter, approaching the subject through a theoretical part and also a practice example, in order to show how these notions are applicable in real situations. In particular, the case study analysed belongs to the Cultural Heritage field, where it is possible to find some difficulties - both in the modelling and sharing phases - due to the complexity of shapes and elements. Focusing on the interoperability between different software, the questions are: What and how many kind of information can I share? Given that this process leads also to a standardization of the modelled parts, is there the possibility of an accuracy loss?

关键词： BIM Interoperability Cultural Heritage Accuracy Standardization reality-based modelling data sharing

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THE USE OF 3d SCANNING ANd PHOTOGRAMMETRY TECHNIQUES IN THE CASE STUdY OF THE ROMAN THEATRE OF NIKOPOLIS. SURVEYING, virtual reconstruction ANd RESTORATION STUdY

THE USE OF 3D SCANNING AND PHOTOGRAMMETRY TECHNIQUES IN THE ...

引用

conference on 3d virtual reconstruction and visualization of complex architectures

作者： Bilis, T. Kouimtzoglou, T. Magnisali, M. Tokmakidis, P. NTUA 4 P Ioakim St Athens 17121 Greece NTUA 22A Olympoy St Athens 15235 Greece NTUA 21 Venizelou St Athens 17123 Greece AUTh 32 Democritu St Kalamaria 55132 Greece

The aim of this paper is to present the specific methods by which 3d scanning and photogrammetric techniques were incorporated into the architectural study, the documentation and the graphic restoration study of the monument of the ancient theatre of Nikopolis. Traditional methods of surveying were enhanced by the use of 3d scanning and image-based 3d reconstruction and 3d remodelling and renderings. For this reason, a team of specialists from different scientific fields has been organized. This presented the opportunity to observe every change of the restoration design process, not only by the use of common elevations and ground plans, but also in 3d space. It has been also very liberating to know how the monument will look like in this unique site after the restoration, so as to obtain at the study stage the best intervention decisions possible. Moreover, these modern work tools helped of course to convince the authorities for the accuracy of the restoration actions and finally to make the proposal clear to the public.

关键词： Theatre Roman Nikopolis 3d scanning Photogrammetry Monument Restoration

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HIGH ANd LOW RESOLUTION TEXTUREd MOdELS OF complex ARCHITECTURAL SURFACES 4

HIGH AND LOW RESOLUTION TEXTURED MODELS OF COMPLEX ARCHITECT...

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

作者： Stathopoulou, E. K. Valanis, A. Lerma, J. L. Georgopoulos, A. Natl Tech Univ Athens Lab Photogrammetry GR-10682 Athens Greece Univ Politecn Valencia Dept Cartog Engn Geodesy & Photogrammetry Valencia Spain

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.

关键词： 3d model visualization texture UV mapping constrained mesh rendering

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AdVANCES IN IMAGE PRE-PROCESSING TO IMPROVE AUTOMATEd 3d reconstruction 6

ADVANCES IN IMAGE PRE-PROCESSING TO IMPROVE AUTOMATED 3D REC...

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

作者： Ballabeni, A. Apollonio, F. I. Gaiani, M. Remondino, F. Univ Bologna Dept Architecture I-40126 Bologna Italy Bruno Kessler Fdn FBK 3DOM Unit Trento Italy

ISBN: (纸本)9781629935201

Tools and algorithms for automated image processing and 3d reconstruction purposes have become more and more available, giving the possibility to process any dataset of unoriented and markerless images. Typically, dense 3d point clouds (or texture 3d polygonal models) are produced at reasonable processing time. In this paper, we evaluate how the radiometric pre-processing of image datasets (particularly in RAW format) can help in improving the performances of state-of-the-art automated image processing tools. Beside a review of common pre-processing methods, an efficient pipeline based on color enhancement, image denoising, RGB to Gray conversion and image content enrichment is presented. The performed tests, partly reported for sake of space, demonstrate how an effective image pre-processing, which considers the entire dataset in analysis, can improve the automated orientation procedure and dense 3d point cloud reconstruction, even in case of poor texture scenarios.

关键词： Pre-processing Filtering Matching Automation denoising RGB to Gray Color 3d reconstruction

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virtual MOdELING FOR CITIES OF THE FUTURE. STATE-OF-THE ART ANd FUTURE CHALLENGES 6

VIRTUAL MODELING FOR CITIES OF THE FUTURE. STATE-OF-THE ART ...

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

作者： Valencia, J. Munoz-Nieto, A. Rodriguez-Gonzalvez, P. Univ Salamanca High Sch Avila Dept Cartog & Land Engn Avila Spain

ISBN: (纸本)9781629935201

3d virtual modeling, visualization, dissemination and management of urban areas is one of the most exciting challenges that must face geomatics in the coming years. This paper aims to review, compare and analyze the new technologies, policies and software tools that are in progress to manage urban 3d information. It is assumed that the third dimension increases the quality of the model provided, allowing new approaches to urban planning, conservation and management of architectural and archaeological areas. despite the fact that displaying 3d urban environments is an issue nowadays solved, there are some challenges to be faced by geomatics in the coming future. displaying georeferenced linked information would be considered the first challenge. Another challenge to face is to improve the technical requirements if this georeferenced information must be shown in real time. Are there available software tools ready for this challenge? Are they useful to provide services required in smart cities? Throughout this paper, many practical examples that require 3d georeferenced information and linked data will be shown. Computer advances related to 3d spatial databases and software that are being developed to convert rendering virtual environment to a new enriched environment with linked information will be also analyzed. Finally, different standards that Open Geospatial Consortium has assumed and developed regarding the three-dimensional geographic information will be reviewed. Particular emphasis will be devoted on KML, LandXML, CityGML and the new IndoorGML.

关键词： Cartography Rendering City Three-dimensional Spatial Infrastructures visualization GIS virtual Reality

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3d SURVEYING ANd FORMAL ANALYSIS OF A STRUCTURAL BAY OF A GOTHIC APSE 9

3D SURVEYING AND FORMAL ANALYSIS OF A STRUCTURAL BAY OF A GO...

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9th International Workshop on 3d-ARCH 3d virtual reconstruction and visualization of complex architectures

作者： Moreno-Garcia, d. Coll-Pla, S. Costa-Jover, A. Samper-Sosa, A. Univ Rovira & Virgili Dept Architecture Ave Univ 1Campus Bellisens Reus 43204 Spain

In recent years, the development of massive data capture techniques such as Terrestrial Laser Scanner (TLS) have made it possible to develop new procedures to evaluate architectural heritage with a high level of accuracy. The study proposes a workflow to identify formal anomalies in the main elements that form a structural bay of the apse of the Cathedral of Girona, studying arches, vaults, buttresses and pillars. The methodology is based on different two-dimensional and three-dimensional procedures, and the database obtained that could help in future research to relate the results with the different construction phases and being applicable to other constructions of similar typology.

关键词： terrestrial laser scanner formal analysis methodology gothic apse vaults geometry Cathedral of Girona

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CRITICAL ANALYSIS ANd dIGITAL reconstructionS OF ALBERTI'S architectures BY THE USE OF 3d MORPHOMETRIC INTEGRATEd SURVEY dATABASE

CRITICAL ANALYSIS AND DIGITAL RECONSTRUCTIONS OF ALBERTI'S A...

引用

conference on 3d virtual reconstruction and visualization of complex architectures

作者： Ferrari, F. Medici, M. Univ Ferrara Dept Architecture Ferrara Italy

Since 2005, dIAPReM Centre of the department of Architecture of the University of Ferrara, in collaboration with the "Centro Studi Leon Battista Alberti" Foundation and the Consorzio Futuro in Ricerca, is carrying out a research project for the creation of 3d databases that could allow the development of a critical interpretation of Alberti's architectural work. The project is primarily based on a common three-dimensional integrated survey methodology for the creation of a navigable multilayered database. The research allows the possibility of reiterative metrical analysis, thanks to the use of a coherent data in order to check and validate hypothesis by researchers, art historians and scholars on Alberti's architectural work. Coherently with this methodological framework, indeed, two case studies are explained in this paper: the church of San Sebastiano in Matua and The Church of the Santissima Annunziata in Florence. Furthermore, thanks to a brief introduction of further developments of the project, a short graphical analysis of preliminary results on Tempio Malatestiano in Rimini opens new perspectives of research.

关键词： 3d survey laser scanner Leon Battista Alberti

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dEVELOPMENT OF virtual REALITY APPLICATION FOR CULTURAL HERITAGE visualization FROM MULTI-SOURCE 3d dATA 8

DEVELOPMENT OF VIRTUAL REALITY APPLICATION FOR CULTURAL HERI...

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

作者： Choromanski, K. Lobodecki, J. Puchala, K. Ostrowski, W. Warsaw Univ Technol Fac Geodesy & Cartog Pl Politech 1 Warsaw Poland

Immersive technologies like virtual or Augmented Reality (VR/AR) are lately becoming more and more popular in wide range of scientific applications. These technologies provide the most immersive way to present spatial data such as point clouds or 3d models. This type of solutions also has significant potential for virtual presentation of cultural heritage. Combination of high-quality photogrammetric 3d models, virtual reality technologies and an advanced visualization engine may bring effect in the form of a nearly real-world experience which may be very useful in terms of popularization as well as research in the area of cultural heritage. In this paper we would like to present results of experimental approach to establish VR system for the Museum of King John III's Palace at Wilanow in Warsaw, Poland.

关键词： virtual Reality visualization Cultural heritage Multi-source data Unreal Engine Mesh generalization Oculus Rift

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dOCUMENTAL STUdIO ANd 3d RECREATION OF THE SAN ILdEFONSO'S SCHOOL FACAdE, ALCALA dE HENARES

DOCUMENTAL STUDIO AND 3D RECREATION OF THE SAN ILDEFONSO'S S...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Echeverria, E. Castano, E. Casa, F. Celis, F. Chias, P. Sch Architecture Dept Architecture Alcala De Henares 28801 Spain

In order to make the last important restoration of the University of Alcala's facade, an important documentation work and 3d recreation has been done, under three premises: historical documental study, study of the materials and, finally, 3d recreation of the facade. Part of these competences have been assumed by our research group under the safety net of the project that we come to tell in this communication.

关键词： Laser Scanning Georeferencing 16th Century Architecture Spain University of Alcala

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