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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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GraphiCon 2020 - Proceedings of the 30th International conference on Computer Graphics and Machine Vision

GraphiCon 2020 - Proceedings of the 30th International Confe...

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30th International conference on Computer Graphics and Machine Vision, GraphiCon 2020

The proceedings contain 142 papers. The topics discussed include: lighting simulation in 3d printing;identification and classification of color textures;a technology to synthesize 360-degree video based on regular dodecahedron in virtual environment systems;depth-aware arbitrary style transfer using instance normalization;physiological aspects of the user's immersion in the virtual reality environment on the example of creating a hardware-software complex for smell transmission;optimization of procedurally generated landscapes;a bidirectional scattering function reconstruction method based on optimization of microrelief heights distribution;the two-level semi-synchronous parallelization method for the caustic and indirect luminance calculation in realistic rendering;the backward photon mapping for the realistic image rendering;calculation of noise components for bidirectional path tracing with photon maps;high speed visualization in the JetOS aviation operating system using hardware acceleration;and simulation of quadcopter's complex spatial motion in virtual environment systems.

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virtual HERITAGE FOR THE dISSEMINATION OF THE BARATTI IN 3d PROJECT 8

VIRTUAL HERITAGE FOR THE DISSEMINATION OF THE BARATTI IN 3D ...

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

作者： Nicastro, G. Puma, P. Univ Florence Dept Architecture I-50121 Florence Italy

The paper describes the final step of the Baratti in 3d project, aimed at the dissemination of the important archaeological heritage of the Etruscan city of Populonia (Tuscany, Italy). The chain of "data metrical surveying - 2d and 3d representation communication" has been applied on the "Princes's tombs" of the monumental necropolis of San Cerbone and its finds to provide a detailed description of their context, workmanship, morphological characteristics and materials to realize the virtual recreation. The preservation of the finds from the excavations in two different museums far from the archaeological area (the Museo Archeologico Nazionale di Firenze and the Museo Archeologico del Territorio di Populonia, in Piombino) makes the understanding of the original context very difficult for visitors. Thus the "Baratti in 3d Project" has been conceived in order to document the tombs, their finds and produce the "virtual match" showing in its entirety the environmental and architectural provenance and material ritual context and in order to display in innovative visual approach this archaeological heritage. To complement the interactive platform, as a physical fallout of this project has been realized "A museum in every sense", a permanent exhibition in the Museo Archeologico del Territorio di Populonia.

关键词： virtual archaeology archaeological survey digital representation Populonia's monumental necropolis

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TERRESTRIAL LASER SCANNER ANd FAST CHARACTERIZATION OF SUPERFICIAL LESIONS IN ARCHITECTURAL dIAGNOSIS 8

TERRESTRIAL LASER SCANNER AND FAST CHARACTERIZATION OF SUPER...

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

作者： Costa-Jover, A. Coll-Pla, S. Queral Llaberia, J. Moreno Garcia, d. Gas Llatge, A. Univ Rovira & Virgili Dept Architecture Reus Spain

The development of massive data captures techniques (MdC) in recent years, such as the Terrestrial Laser Scanner (TLS), raises the possibility of developing new assessment procedures for architectural heritage. The 3d models that it is able to obtain is a great potential tool, both for conservation purposes and for historical and architectural studies. The paper proposes a simple, non-invasive methodology for the assessment of masonry vaults from point clouds which makes it possible to obtain relevant data about the formal anomalies. The methodology is tested in Tortosa's Gothic Cathedral's vaults, where the geometrical differences between vaults, a priori equal, are identified and related with the partially known construction phases. The procedure can be easily used on any other vaulted construction of any kind, but is especially useful to deal with the complex geometry of Gothic masonry vaults.

关键词： terrestrial laser scanner pathology defensive towers masonry Camarles Tower

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THE INTEGRATEd SURVEY OF NARROW SPACES ANd UNdERGROUNd ARCHITECTURE: THE CASE STUdY OF CAMPANA CAVES BAS-RELIEFS 8

THE INTEGRATED SURVEY OF NARROW SPACES AND UNDERGROUND ARCHI...

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

作者： Clini, P. Nespeca, R. Angeloni, R. Mammoli, R. Polytech Univ Marche Dept Civil & Bldg Engn & Architecture DICEA Ancona Italy

Italian Cultural Heritage is rich in fascinating Underground Heritage (UH) to be protected and preserved because of its fragility and historical importance. An accurate and high-resolution 3d model is essential to reach an appropriate level of knowledge to safeguard caves but there are several obstacles to face. Underground data acquisition and following elaborations are problematic due to environmental conditions such as lack of homogeneous light sources, highly absorbing and unstable surfaces, narrow spaces and complex geometry. For these reasons, the integration of different techniques is mandatory to achieve a valid final product that could be an important basis for consolidation, preservation and valorization of the UH. In this paper, an integrated survey method is tested for a realistic digital reconstruction of hypogeal spaces. In addition to outputs for experts of conservation, the creation of multimedia products for a wider audience of non-professionals users is investigated as a way to preserve UH from decay. Thanks to VR, visitors virtually walk through the underground galleries observing and interacting, making accessible also fragile environments with forbidden access due to preservation policies

关键词： narrow spaces underground architecture terrestrial laser scanning photogrammetry bas-relief immersive virtual reality

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KNOWLEdGE-BASEd FRAMEWORK FOR AUTOMATIC SEMANTISATION ANd reconstruction OF MILITARY ARCHITECTURE ON CITY-SCALE MOdELS 8

KNOWLEDGE-BASED FRAMEWORK FOR AUTOMATIC SEMANTISATION AND RE...

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

作者： Gros, A. Jacquot, K. Messaoudi, T. ENS Architecture Lyon MAP ARIA UMR CNRS MC 3495 Lyon France ENS Architecture Nancy MAP CRAI UMR CNRS MC 3495 Nancy France

The scale models of fortified towns belonging to the Plans-Reliefs collection are exceptional witnesses of the formation of the French territory. The aim of the URBANIA project is the valorisation and the diffusion of this heritage through the creation of virtual models. The town scale model of Strasbourg at 1: 600 currently exhibited in the Historical Museum of Strasbourg was selected as a case study. We develop and experiment an automatic procedure to identify and reconstruct military architecture works from point cloud digitisation of this fragile and bulky heritage. A priori knowledge formalized in a domain ontology informs the identification of the works - via geometrical feature comparison and consistency evaluation within the fortification system morphology - and their parametric 3d reconstruction refined by direct fit to the initial point cloud.

关键词： city-scale model knowledge-based modelling architectural heritage bastioned fortifications automation in data processing point cloud processing and analysis

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REVERSE MOdELING OF CULTURAL HERITAGE: PIPELINE ANd BOTTLENECKS 8

REVERSE MODELING OF CULTURAL HERITAGE: PIPELINE AND BOTTLENE...

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

作者： Camagni, F. Colaceci, S. Russo, M. Sapienza Univ Rome Dept Hist Representat & Restorat Architecture Rome Italy

The present work is suggested as a contribution to the debate on Reverse Modeling (RM) topic in the Cultural Heritage field. It wants to test the methodology, the limits and the bottlenecks of the RM pipeline in the architectural field, with particular attention to the geometric shapes reading and interpretation. The mathematical reconstruction of architectural models represents an overlaid result of anthropic and natural transformations framed inside a complex process of shape simplification and surface generation. This pipeline must be supported by a careful Heritage reading by means of architecture rules, both preserving the actual shape and the original intent of the building designer. The integration of these last two aspects make the process of RM applied to CH extremely complex. It involves a cognitive activity aimed at choosing on the one hand the best 3d survey technique to obtain reliable 3d data, on the other hand reaching a suitable architectural knowledge for achieving a plausible modeling result. The research presented describes a RM process applied to an ecclesiastical architecture, highlighting some key passages: an integrated survey approach to extract geometrical information, data analysis and generation of a mathematical 3d model, reliable from both a formal and cultural point of view.

关键词： Reverse modelling Massive survey Cultural Heritage Multi-scale 3d NURBS Mathematical models

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THREE-dIMENSIONAL RECORdING ANd PHOTOREALISTIC MOdEL reconstruction FOR virtual MUSEUM APPLICATION - AN EXPERIENCE IN MALAYSIA 8

THREE-DIMENSIONAL RECORDING AND PHOTOREALISTIC MODEL RECONST...

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

作者： Wei, O. C. Majid, Z. Setan, H. Ariff, M. F. M. Idris, K. M. darwin, N. Yusoff, A. R. Zainuddin, K. Univ Teknol Malaysia Geospatial Imaging & Informat Res Grp Fac Built Environm & Surveying Johor Bahru Madagascar

In recent years, museums are utilizing the ability of virtual reality (VR) technologies to visualize their collections in three-dimensional (3d) environment. The demands for 3d digitization of cultural heritage have increase greatly to facilitate the development of virtual museum. Among the available techniques, the use of laser scanning for digital recording and 3d reproduction of the heritage sites and archaeological artefacts are technically more reliable due to its rapid and high resolution data capture. However, the suitable 3d laser scanners used greatly depend on the level of details and size of an object. This research used medium and close-range type of laser scanners to digitally record the heritage objects. The aim of this research was to develop methodology framework for digital recording and 3d reproduction of archaeological artefact and heritage sites in Malaysia by using terrestrial laser scanning technology. Besides, this research focused on the reconstruction of photorealistic 3d models based on the colour information yield by close-range photogrammetry. The colour descriptions were obtained either by built-in camera or externally integrated camera on the laser scanner. For better colour descriptions, external images were captured by independent Nikon d300s digital camera. The geometric model accuracy of A'Famosa and terracotta Buddha statuette was in 5mm and 0.41mm respectively. 3d flythrough animation was rendered by using the coloured point clouds model. The development of 3d virtual Walkthrough Museum (3dVWM) utilized the 3d PdF document and SCENE WebShare platform to offer realistic visualization experience to the visitors where the reality-based models could be manipulate in 3d geometric aspects and use of metric analysis. Thus, 3dVWM can facilitate the virtual museum application in Malaysia and enable wider visitors to virtually appreciate the cultural heritage in Malaysia. Thus, this indirectly stimulates the tourism industry in our country.

关键词： Three-dimensional Photorealistic virtual Museum Terrestrial Laser Scanning Close-Range Laser Scanning

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WOOdEN TRUSSES reconstruction ANd ANALYSIS THROUGH PARAMETRIC 3d MOdELING 8

WOODEN TRUSSES RECONSTRUCTION AND ANALYSIS THROUGH PARAMETRI...

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

作者： Prati, d. Zuppella, G. Mochi, G. Guardigli, L. Gulli, R. Univ Bologna DA Bologna Italy

This paper aims to indicate a new methodological approach, based on generative algorithms, to attempt a more in-depth and transversal understanding of the behavior of these wooden structures. The developed method accelerates modeling procedures and brings on new tools for analyzing these structural systems when surveyed through TLS devices. The main topic of this work is the most recent step of a wider research project that has analyzed a few wooden roofing structures in the area of bologna. These case studies are represented by a set of important churches in Bologna, all built between the 16th and 18th centuries, whose pitched roofs are supported by timber trusses. Among them, the most impressive is the wooden truss in the St. Peter Cathedral that has approximately 26 meters of span, 7 meters of height for nearly 9 tons of weight. It also shows a complex static conception with the coexistence of an external nondeformable triangle and an internal virtual discharging arc. The focus is on the transformation of the point cloud into 3d models using parametric modeling tools such as Grasshopper generative algorithms. These algorithms, once created for a single truss, allow to automatically generating 3d models of all trusses, changing only input parameters.

关键词： Building heritage Terrestrial Laser Scanning Generative algorithms Structural systems reverse engineering Cloud to 3d model comparison

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THE REAL IN THE virtual. THE 3d MOdEL IN THE CULTURAL HERITAGE SECTOR: THE TIP OF THE ICEBERG 8

THE REAL IN THE VIRTUAL. THE 3D MODEL IN THE CULTURAL HERITA...

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

作者： Maffei, S. Pratali Canevese, E. de Gottardo, T. Univ Trieste Dept Engn & Architecture Trieste Italy Virtualgeo Sacile PN Italy

The twenty-year and interdisciplinary research activity carried out by virtualgeo has focused on the development of new methods and tools for 3d modeling that go beyond the simple digital-virtual reconstruction of solid modelling, in order to realize three-dimensional informative and photogrammetric representations that faithfully reproduce reality. These so called Advanced 3d models are the basis for carrying out metrological investigations to support the design and the BIM database population. In particular, in this paper we will deal with the segmentation tool, which allows the classification of the photogrammetric 3d model (material, degradation and chronological features). In detail, we will illustrate the collaboration experience between virtualgeo and the University of Trieste, course in Technologies for the conservation and enhancement of architectural heritage of the Master's degree in Architecture. The experience focused on the study of the archaeological site of the Roman river port of Aquileia, which Advanced 3d model was supplied by virtualgeo. Firstly, the work focused on the informative contents necessary for the subsequent elaborations (different types of materials, alteration/degradation forms), starting from the use of coded lexicons (UNI 11182/2006). Subsequently, the quantitative data were associated to each category of homogeneous elements, obtainable from the segmentation ("mapping") of the 3d model. This experience gave the chance to test the EasyCUBE PRO software: it was gradually adapted to the specific needs emerged both during the analysis of the site and the definition of conservation interventions, so as the outputs that can be generated after the elaboration of the Advanced 3d model.

关键词： BIM for Cultural Heritage (HBIM) Advanced 3d conservation architectural heritage virtualgeo Aquileia Roman fluvial port

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QUALITY FEATURES FOR THE INTEGRATION OF TERRESTRIAL ANd UAV IMAGES 8

QUALITY FEATURES FOR THE INTEGRATION OF TERRESTRIAL AND UAV ...

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

作者： Farella, E. M. Torresani, A. Remondino, F. FBK 3D Opt Metrol 3DOM Unit Trento Italy

The paper presents an innovative approach for improving the orientation results when terrestrial and UAV images are jointly processed. With the existing approaches, the processing of images coming from different platforms and sensors leads often to noisy and inaccurate 3d reconstructions, due to the different nature and properties of the acquired images. In this work, a photogrammetric pipeline is proposed to filter and remove bad computed tie points, according to some quality feature indicators. A completely automatic procedure has been developed to filter the sparse point cloud, in order to improve the orientation results before computing the dense point cloud. We report some tests and results on a dataset of about 140 images (Modena cathedral, Italy). The effectiveness of the filtering procedure was verified using some internal quality indicators, external checks (ground truth data) and qualitative visual analyses. [GRAPHICS] .

关键词： photogrammetry data fusion terrestrial images UAV

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