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检索条件"任意字段=Conference on 3D-Arch 2015 - 3D Virtual Reconstruction and Visualization of Complex Architectures"

共 154 条记录，以下是141-150 订阅

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AUGUSTO'S SUNdIAL: IMAGE-BASEd MOdELING FOR REVERSE ENGENEERING PURPOSES

AUGUSTO'S SUNDIAL: IMAGE-BASED MODELING FOR REVERSE ENGENEER...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Baiocchi, V. Barbarella, M. del Pizzo, S. Giannone, F. Troisi, S. Piccaro, C. Marcantonio, d. Sapienza Univ Rome DICEA Via Eudossiana 18 I-00184 Rome Italy Univ Bologna DICAM Viale Risorgimento 2 I-40136 Bologna Italy Parthenope Univ Naples Ctr Direz Isola C4 Naples Italy Niccolo Cusano Univ Via Don Carlo Gnocchi 3 I-00166 Rome Italy Spektra Srl Via Pellizzari 23-A I-20871 Vimercate MB Italy

A photogrammetric survey of a unique archaeological site is reported in this paper. The survey was performed using both a panoramic image-based solution and by classical procedure. The panoramic image-based solution was carried out employing a commercial solution: the Trimble V10 Imaging Rover (IR). Such instrument is an integrated cameras system that captures 360 degrees digital panoramas, composed of 12 images, with a single push. The direct comparison of the point clouds obtained with traditional photogrammetric procedure and V10 stations, using the same GCP coordinates has been carried out in Cloud Compare, open source software that can provide the comparison between two point clouds supplied by all the main statistical data. The site is a portion of the dial plate of the "Horologium Augusti" inaugurated in 9 B.C.E. in the area of Campo Marzio and still present intact in the same position, in a cellar of a building in Rome, around 7 meter below the present ground level.

关键词： Photogrammetry Cultural Heritage 3d modeling Horologium Augusti Campo Marzio Rome

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MOdELLING ANd ACCURACY IN A BIM ENVIRONMENT FOR PLANNEd CONSERVATION: THE APARTMENT OF TROIA OF GIULIO ROMANO

MODELLING AND ACCURACY IN A BIM ENVIRONMENT FOR PLANNED CONS...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Adami, A. Scala, B. Spezzoni, A. Politecn Milan Polo Mantova Dept ABC Piazza Arco 4 Mantua Italy

Modeling of Cultural Heritage in a BIM environment, and in general of existing buildings, requires special attention because there are two diametrically opposed possibilities. On the one hand the attempt is to realize a very complex and accurate model, in order to provide the most comprehensive representation of the architecture as possible. The opposite position leads to build a very schematic and symbolic model of as-built architecture. It is not easy to determine which is the right balance between these two attitudes because each architecture requires a personalized approach and not standards. It's, however, necessary to find rules to figure out which items are represented, what is the minimum level of detail to consider adequate and how to deal with alterations from simple and linear geometries. These two facing possibilities deal with different goals and tools. In the field of restoration or planned conservation, that is the most common approach for existing buildings, the attention focuses on the exceptions and particularities of each architecture: the important aspect is to understand and describe exactly each part as a singularity (as it is). In this context it is very difficult to find a standard or a common solution. The first possibility of modelling seems to be very close to this approach, but it clashes with two important aspects. A first problem concerns the modelling software. Usually commercial BIM modelling software doesn't allow to realize very complex and high detailed solutions. They prefer working with predefined families and try to categorize each element in standard solution. The possibility to build new families is expected, but it often requires a lot of time. The second difficulty is the real efficiency of such an accurate model. In fact, it could be very difficult to link external elements to the model or use it in many traditional BIM applications. In this paper, we suggest another possible approach that represents the first result of a r

关键词： BIM accuracy 3d modelling HBIM planned conservation restoration

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INTEGRATION OF POINT CLOUdS dATASET FROM dIFFERENT SENSORS

INTEGRATION OF POINT CLOUDS DATASET FROM DIFFERENT SENSORS

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Abdullah, C. K. A. F. Che Ku Baharuddin, N. Z. S. Ariff, M. F. M. Majid, Z. Lau, C. L. Yusoff, A. R. Idris, K. M. Aspuri, A. Univ Teknol Malaysia Fac Geoinformat & Real Estate Dept Geoinformat Utm Skudai Malaysia

Laser Scanner technology become an option in the process of collecting data nowadays. It is composed of Airborne Laser Scanner (ALS) and Terrestrial Laser Scanner (TLS). ALS like Phoenix AL3-32 can provide accurate information from the viewpoint of rooftop while TLS as Leica C10 can provide complete data for building facade. However if both are integrated, it is able to produce more accurate data. The focus of this study is to integrate both types of data acquisition of ALS and TLS and determine the accuracy of the data obtained. The final results acquired will be used to generate models of three-dimensional (3d) buildings. The scope of this study is focusing on data acquisition of UTM Eco-home through laser scanning methods such as ALS which scanning on the roof and the TLS which scanning on building facade. Both device is used to ensure that no part of the building that are not scanned. In data integration process, both are registered by the selected points among the manmade features which are clearly visible in Cyclone 7.3 software. The accuracy of integrated data is determined based on the accuracy assessment which is carried out using man-made registration methods. The result of integration process can achieve below 0.04m. This integrated data then are used to generate a 3d model of UTM Eco-home building using SketchUp software. In conclusion, the combination of the data acquisition integration between ALS and TLS would produce the accurate integrated data and able to use for generate a 3d model of UTM eco-home. For visualization purposes, the 3d building model which generated is prepared in Level of detail 3 (LOd3) which recommended by City Geographic Mark-Up Language (CityGML).

关键词： laser scanners Airborne Laser Scanner (ALS) Terrestrial Laser Scanner (TLS) accuracy assessment three dimensional (3d) model

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dOCUMENTING BRONZE AGE AKROTIRI ON THERA USING LASER SCANNING, IMAGE-BASEd MOdELLING ANd GEOPHYSICAL PROSPECTION

DOCUMENTING BRONZE AGE AKROTIRI ON THERA USING LASER SCANNIN...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Trinks, I. Wallner, M. Kucera, M. Verhoeven, G. Valdelomar, J. Torrejon Locker, K. Nau, E. Sevara, C. Aldrian, L. Neubauer, W. Klein, M. Ludwig Boltzmann Inst Archaeol Prospect & Virtual Hohe Warte 38 A-1190 Vienna Austria Norwegian Inst Cultural Heritage Res Postboks 736 N-0105 Oslo Norway Vienna Inst Archaeol Sci Franz Klein Gasse 1 A-1190 Vienna Austria 7Reasons Medien GmbH Bauerlegasse 4-6 A-1200 Vienna Austria

The excavated architecture of the exceptional prehistoric site of Akrotiri on the Greek island of Thera/Santorini is endangered by gradual decay, damage due to accidents, and seismic shocks, being located on an active volcano in an earthquake-prone area. Therefore, in 2013 and 2014 a digital documentation project has been conducted with support of the National Geographic Society in order to generate a detailed digital model of Akrotiri's architecture using terrestrial laser scanning and image-based modeling. Additionally, non-invasive geophysical prospection has been tested in order to investigate its potential to explore and map yet buried archaeological remains. This article describes the project and the generated results.

关键词： cultural heritage documentation laser scanning image-based modelling ground-penetrating radar virtual reconstruction

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4d reconstruction ANd visualization OF CULTURAL HERITAGE: ANALYZING OUR LEGACY THROUGH TIME

4D RECONSTRUCTION AND VISUALIZATION OF CULTURAL HERITAGE: AN...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Rodriguez-Gonzalvez, Pablo Luis Munoz-Nieto, Angel del Pozo, Susana Sanchez-Aparicio, Luis Javier Gonzalez-Aguilera, diego Micoli, Laura Barsanti, Sara Gonizzi Guidi, Gabriele Mills, Jon Fieber, Karolina Haynes, Ian Hejmanowska, Beata Univ Salamanca High Sch Avila Dept Cartog & Land Engn Avila Spain Politecn Milan Dept Mech Engn Milan Italy Newcastle Univ Sch Civil Engn & Geosci Newcastle Upon Tyne Tyne & Wear England Newcastle Univ Sch Hist Class & Archaeol Newcastle Upon Tyne Tyne & Wear England Stanislaw Stasz Sci Assoc Krakow Poland

Temporal analyses and multi-temporal 3d reconstruction are fundamental for the preservation and maintenance of all forms of Cultural Heritage (CH) and are the basis for decisions related to interventions and promotion. Introducing the fourth dimension of time into three-dimensional geometric modelling of real data allows the creation of a multi-temporal representation of a site. In this way, scholars from various disciplines (surveyors, geologists, archaeologists, architects, philologists, etc.) are provided with a new set of tools and working methods to support the study of the evolution of heritage sites, both to develop hypotheses about the past and to model likely future developments. The capacity to "see" the dynamic evolution of CH assets across different spatial scales (e.g. building, site, city or territory) compressed in diachronic model, affords the possibility to better understand the present status of CH according to its history. However, there are numerous challenges in order to carry out 4d modelling and the requisite multi-data source integration. It is necessary to identify the specifications, needs and requirements of the CH community to understand the required levels of 4d model information. In this way, it is possible to determine the optimum material and technologies to be utilised at different CH scales, as well as the data management and visualization requirements. This manuscript aims to provide a comprehensive approach for CH time-varying representations, analysis and visualization across different working scales and environments: rural landscape, urban landscape and architectural scales. Within this aim, the different available metric data sources are systemized and evaluated in terms of their suitability.

关键词： 4d Modelling Cultural Heritage data Fusion Monitoring visualization

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SURVEY ANd MOdELLING FOR THE BIM OF BASILICA OF SAN MARCO IN VENICE

SURVEY AND MODELLING FOR THE BIM OF BASILICA OF SAN MARCO IN...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Fregonese, L. Taffurelli, L. Adami, A. Chiarini, S. Cremonesi, S. Helder, J. Spezzoni, A. Politecn Milan Dept ABC Mantova CampusPiazza Arco 3 Mantua Italy

The Basilica of San Marco is a singular case in the field of Cultural heritage, as it constitutes a construction site always active for the maintenance and preservation of the basilica itself. The continuous intervention of conservation, due to the particular environmental conditions of Venice and the opening to the public, together with the complexity of the building itself, imposes the need to identify an optimized management system. For this reason, in 2013 the Procurator of St. Marco Basilica commissioned the construction of a 3d model of the Basilica to be used for the creation of a BIM. The model must meet the required precision of the scale of 1:50, and should also include, in addition to the geometric description, a description of the mosaic and marble surfaces of the basilica through high resolution orthophoto which are essential for the restoration of the mosaics. The complexity of the church and the large and continuous flow of public led to work in non-optimal conditions especially for the acquisition stage. The basilica has certain peculiarities that led to some important choices, for example the use of photogrammetry instead of laser scanning technique. The same technique was preferred also by the need to realize, in addition to the geometric model, high-resolution orthophotos of marbles and mosaic surfaces. The modelling of the basilica has highlighted a number of problems related to the building features. The basilica, indeed, is the result of the juxtaposition of elements (capitals, columns) with different origin, which therefore cannot be standardized in special libraries. Moreover, especially in the extensive mosaic areas, there are not edges that characterize the architecture, but only beveled surfaces. This has resulted in a change also in the modeling paradigm with the need to identify alternative systems even for the construction of simple elements. Therefore, we decided to model using NURBS since it is the method that allows greater adherence

关键词： HBIM modelling Cultural Heritage complex architecture

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3-d Tessellation of Plant Tissue A dual optimization approach to cell-level meristem reconstruction from microscopy images

3-d Tessellation of Plant Tissue A dual optimization approac...

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2015 International conference on 3d Vision (ENS)

作者： Cerutti, Guillaume Ribes, Sophie Godin, Christophe Galvan-Ampudia, Carlos Vernoux, Teva INRIA Virtual Plants INRIA Team Montpellier France Univ Lyon UCBL ENS Lyon RDPCNRSINRA Lyon France

ISBN: (纸本)9781467383325

The goal of this paper is the reconstruction of topologically accurate 3-dimensional triangular meshes representing a complex, multi-layered plant tissue structure. Based on time sequences of meristem images of the model plant Arabidopsis thaliana, displaying fluorescence markers on either cell membranes or cell nuclei under confocal laser scanning microscopy, we aim at obtaining faithful reconstructions of all the cell walls in the tissue. In the presented method, the problem is tackled under the angle of topology, and the shape of the cells is seen as the dual geometry of a 3-d simplicial complex accounting for their adjacency relationships. We present a method for optimizing such complexes using an energy minimization process, designed to make them fit to the actual adjacencies in the tissue. The resulting dual meshes constitute a light discrete representation of the cell surfaces that enables fast visualization, and quantitative analysis, and allows in silico physical and mechanical simulations on real-world data.

关键词： mesh optimization voronoi diagrams topological transformation confocal microscopy shoot apical meristem

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UNdERWATER PHOTOGRAMMETRY, COdEd TARGET ANd PLENOPTIC TECHNOLOGY: A SET OF TOOLS FOR MONITORING REd CORAL IN MEdITERRANEAN SEA IN THE FRAMEWORK OF THE "PERFECT" PROJECT

UNDERWATER PHOTOGRAMMETRY, CODED TARGET AND PLENOPTIC TECHNO...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： drap, P. Royer, J. P. Nawaf, M. M. Saccone, M. Merad, d. Lopez-Sanz, A. Ledoux, J. B. Garrabou, J. Aix Marseille Univ Univ Toulon LSIS UMR 7296 CNRSENSAM Domaine Univ St JeromeBatiment Polytech F-13397 Marseille France CSIC Inst Ciencies Mar Barcelona Spain Aix Marseille Univ Univ Toulon Mediterranean Inst Oceanog MIO UM CNRS IRD 110 Campus Luminy OceanomedBatiment Mediterranee F-13288 Marseille 09 France

PErfECT 'Photogrammetry, gEnetic, Ecology for red coral ConservaTion' is a project leaded by the Laboratoire des Sciences de lInformation et des Systmes (LSIS - UMR 7296 CNRS) from the Aix-Marseille University (France) in collaboration with the Spanish National Agency for Scientific Research (CSIC, Spain). The main objective of the project is to develop innovative Tools for the conservation of the Mediterranean red coral, Corallium rubrum. PErfECT was funded by the Total Fundation. The adaptation of digital photogrammetric techniques for use in submarine is rapidly increasing in recent years. In fact, these techniques are particularly well suited for use in underwater environments. PErfECT developed different photogrammetry tools to enhance the red coral population surveys based in: (i) automatic orientation on coded quadrats, (ii) use of NPR (Non Photo realistic Rendering) techniques, (iii) the calculation of distances between colonies within local populations and finally (iv) the use of plenoptic approaches in underwater conditions.

关键词： Red coral Photogrammetry Orthophoto Plenoptic NPR

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CULTURAL HERITAGE THROUGH TIME: A CASE STUdY AT HAdRIAN'S WALL, UNITEd KINGdOM

CULTURAL HERITAGE THROUGH TIME: A CASE STUDY AT HADRIAN'S WA...

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Fieber, K. d. Mills, J. P. Peppa, M. V. Haynes, I. Turner, S. Turner, A. douglas, M. Bryan, P. G. Newcastle Univ Sch Civil Engn & Geosci Newcastle Upon Tyne NE1 7RU Tyne & Wear England Newcastle Univ Sch Hist Class & Archaeol Newcastle Upon Tyne NE1 7RU Tyne & Wear England English Heritage York N Yorkshire England Hist England York N Yorkshire England

diachronic studies are central to cultural heritage research for the investigation of change, from landscape to architectural scales. Temporal analyses and multi-temporal 3d reconstruction are fundamental for maintaining and safeguarding all forms of cultural heritage. Such studies form the basis for any kind of decision regarding intervention on cultural heritage, helping assess the risks and issues involved. This article introduces a European-wide project, entitled "Cultural Heritage Through Time", and the case study research carried out as a component of the project in the UK. The paper outlines the initial stages of the case study of landscape change at three locations on Hadrian's Wall, namely Beckfoot Roman Fort, Birdoswald Roman Fort and Corbridge Roman Station, all once part of the Roman Empire's north-west frontier. The main aim of the case study is to integrate heterogeneous information derived from a range of sources to help inform understanding of temporal aspects of landscape change. In particular, the study sites are at risk from natural hazards, notably erosion and flooding. The paper focuses on data collection and collation aspects, including an extensive archive search and field survey, as well as the methodology and preliminary data processing.

关键词： 4d Modelling Cultural Heritage data Collection data Fusion Monitoring visualization

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TOWARdS GUIdEd UNdERWATER SURVEY USING LIGHT VISUAL OdOMETRY

TOWARDS GUIDED UNDERWATER SURVEY USING LIGHT VISUAL ODOMETRY

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conference on 3d virtual reconstruction and visualization of complex architectures

作者： Nawaf, M. M. drap, P. Royer, P. Merad, d. Saccone, M. Aix Marseille Univ LSIS UMR 7296 Univ Toulon CNRSENSAM Domaine Univ St JeromeBatiment Polytech F-13397 Marseille France

A light distributed visual odometry method adapted to embedded hardware platform is proposed. The aim is to guide underwater surveys in real time. We rely on image stream captured using portable stereo rig attached to the embedded system. Taken images are analyzed on the fly to assess image quality in terms of sharpness and lightness, so that immediate actions can be taken accordingly. Images are then transferred over the network to another processing unit to compute the odometry. Relying on a standard ego-motion estimation approach, we speed up points matching between image quadruplets using a low level points matching scheme relying on fast Harris operator and template matching that is invariant to illumination changes. We benefit from having the light source attached to the hardware platform to estimate a priori rough depth belief following light divergence over distance low. The rough depth is used to limit points correspondence search zone as it linearly depends on disparity. A stochastic relative bundle adjustment is applied to minimize re-projection errors. The evaluation of the proposed method demonstrates the gain in terms of computation time w.r.t. other approaches that use more sophisticated feature descriptors. The built system opens promising areas for further development and integration of embedded computer vision techniques.

关键词： Visual odometry underwater imaging computer vision probabilistic modelling embedded systems

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