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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131-140 订阅

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CREATING PROCEdURAL WINdOW BUILdING BLOCKS USING THE GENERATIVE FACT LABELING METHOd

CREATING PROCEDURAL WINDOW BUILDING BLOCKS USING THE GENERAT...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Thaller, W. Zmugg, R. Krispel, U. Posch, M. Havemann, S. Fellner, d. W. Graz Univ Technol Inst Comp Graph & Knowledge Visualizat CGV Graz Austria Tech Univ Darmstadt Darmstadt Germany Fraunhofer IGD Darmstadt Germany

ISBN: (纸本)9781629935201

The generative surface reconstruction problem can be stated like this: Given a finite collection of 3d shapes, create a small set of functions that can be combined to generate the given shapes procedurally. We propose generative fact labeling (GFL) as an attempt to organize the iterative process of shape analysis and shape synthesis in a systematic way. We present our results for the reconstruction of complex windows of neo-classical buildings in Graz, followed by a critical discussion of the limitations of the approach. [GRAPHICS] .

关键词： Procedural Modeling Neo-Classical architecture 3d-reconstruction Shape Grammars Fact Labeling Method

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SHAdOWS OF PREVIOUS dAYS A JOURNEY INTO dIGITAL reconstruction

SHADOWS OF PREVIOUS DAYS A JOURNEY INTO DIGITAL RECONSTRUCTI...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Linsinger, Stefan Linsinger ZT GmbH A-5600 Salzburg Austria

ISBN: (纸本)9781629935201

In November 2011 the listed state rooms on the second floor of the Viennese city palace Am Hof 2 were largely destroyed by fire. The historic rooms on the ground floor, the monumental, marble-clad bank service hall and the wood-panelled club rooms all suffered badly from other consequences of the fire such as water and smoke damage. Planning and concept development for the reconstruction of the interior elements made of various materials was carried out be a team of specialist conservators in close collaboration with the Bundesdenkmalamt (Federal Monuments Office). This paper will confine itself to describing the planning, concept development and production of the sample areas for the wooden elements although in practice concept development for all materials ran parallel.

关键词： digital Photogrammetry virtual reconstruction close range scanning surface modelling duplicate

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SOLId IMAGE EXTRACTION FROM LIdAR POINT CLOUdS

SOLID IMAGE EXTRACTION FROM LIDAR POINT CLOUDS

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Munaretto, d. Roggero, M. Politecn Torino Dipartimento Architettura & Design Turin Italy

ISBN: (纸本)9781629935201

In laser scanner architectural surveying it is necessary to extract orthogonal projections from the tridimensional model, plans, elevations and cross sections. The paper presents the workflow of architectural drawings production from laser scans, focusing on the orthogonal projection of the point cloud on solid images, in order to avoid the time consuming surface modeling, when it is not strictly necessary. The proposed procedures have been implemented in fortran90 and included in the VELOCE software package, then tested and applied to the case study of the San Pietro church in Porto Venere (SP), integrating the architectural surveying with an existing bathymetric and coastal surveying.

关键词： point clouds laser scanner solid image

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AdVANCEd REPRESENTATION TECHNOLOGIES APPLIEd TO THE TEMPLE OF NEPTUNE, THE SPHINX ANd THE METOPE IN THE archAEOLOGICAL PARK OF PAESTUM

ADVANCED REPRESENTATION TECHNOLOGIES APPLIED TO THE TEMPLE O...

引用

conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Cardinale, T. Valva, R. Lucarelli, M. Univ Basilicata Dipartimento Culture Europee & Mediterraneo Potenza Italy

ISBN: (纸本)9781629935201

The Summer School of Surveying and 3d modelling in Paestum was an opportunity to explore the use of innovative tools and advanced techniques in the design, implementation and management of surveys of historic and artistic complexes. In general such methods are used specifically for the development and management of vulnerability maps of existing heritage and so for the preventive conservation and valorisation of the built environment. The accurate detection of risk situations and the systematic promotion of highly selected and minimally invasive maintenance practices means that restoration and the efficiency of cycles of intervention can be optimized, with clear benefits from economic and cultural points of view. The group worked on the survey and 3d modelling of the Temple of Neptune, the Sphinx and the Metope of the archaeological Park in Paestum.

关键词： Survey Preservation 3d Modelling Historic Heritage digital Images

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dIGITAL reconstruction OF AN archAEOLOGICAL SITE BASEd ON THE INTEGRATION OF 3d dATA ANd HISTORICAL SOURCES

DIGITAL RECONSTRUCTION OF AN ARCHAEOLOGICAL SITE BASED ON TH...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Guidi, G. Russo, M. Angheleddu, d. Politecn Milan Dept Mech Milan Italy Politecn Milan Dept Design Milan Italy

ISBN: (纸本)9781629935201

The methodology proposed in this paper in based on an integrated approach for creating a 3d digital reconstruction of an archaeological site, using extensively the 3d documentation of the site in its current state, followed by an iterative interaction between archaeologists and digital modelers, leading to a progressive refinement of the reconstructive hypotheses. The starting point of the method is the reality-based model, which, together with ancient drawings and documents, is used for generating the first reconstructive step. Such rough approximation of a possible architectural structure can be annotated through archaeological considerations that has to be confronted with geometrical constraints, producing a reduction of the reconstructive hypotheses to a limited set, each one to be archaeologically evaluated. This refinement loop on the reconstructive choices is iterated until the result become convincing by both points of view, integrating in the best way all the available sources. The proposed method has been verified on the ruins of five temples in the My Son site, a wide archaeological area located in central Vietnam. The integration of 3d surveyed data and historical documentation has allowed to support a digital reconstruction of not existing architectures, developing their three-dimensional digital models step by step, from rough shapes to highly sophisticate virtual prototypes.

关键词： 3d survey archaeological sites reality based modeling digital reconstruction integration of methods Cham architecture

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VALIdATION OF A PARAMETRIC APPROACH FOR 3d FORTIFICATION MOdELLING: APPLICATION TO SCALE MOdELS

VALIDATION OF A PARAMETRIC APPROACH FOR 3D FORTIFICATION MOD...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Jacquot, K. Chevrier, C. Halin, G. ENSA Nancy MAP Crai UMR CNRSMCC 3495 F-54000 Nancy France

ISBN: (纸本)9781629935201

Parametric modelling approach applied to cultural heritage virtual representation is a field of research explored for years since it can address many limitations of digitising tools. For example, essential historical sources for fortification virtual reconstructions like plans-reliefs have several shortcomings when they are scanned. To overcome those problems, knowledge based-modelling can be used: knowledge models based on the analysis of theoretical literature of a specific domain such as bastioned fortification treatises can be the cornerstone of the creation of a parametric library of fortification components. Implemented in Grasshopper, these components are manually adjusted on the data available (i.e. 3d surveys of plans-reliefs or scanned maps). Most of the fortification area is now modelled and the question of accuracy assessment is raised. A specific method is used to evaluate the accuracy of the parametric components. The results of the assessment process will allow us to validate the parametric approach. The automation of the adjustment process can finally be planned. The virtual model of fortification is part of a larger project aimed at valorising and diffusing a very unique cultural heritage item: the collection of plans-reliefs. As such, knowledge models are precious assets when automation and semantic enhancements will be considered.

关键词： architectural heritage bastioned fortifications parametric modelling knowledge based scale model 3d surveys

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ACCURATE MULTIVIEW STEREO reconstruction WITH FAST VISIBILITY INTEGRATION ANd TIGHT dISPARITY BOUNdING

ACCURATE MULTIVIEW STEREO RECONSTRUCTION WITH FAST VISIBILIT...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Toldo, R. Fantini, F. Giona, L. Fantoni, S. Fusiello, A. 3Dflow Srl I-37134 Verona Italy Univ Udine Dipartimento Ingn Elettr Gest & Meccan I-33100 Udine Italy

ISBN: (纸本)9781629935201

A novel multi-view stereo reconstruction method is presented. The algorithm is focused on accuracy and it is highly engineered with some parts taking advantage of the graphics processing unit. In addition, it is seamlessly integrated with the output of a structure and motion pipeline. In the first part of the algorithm a depth map is extracted independently for each image. The final depth map is generated from the depth hypothesis using a Markov random field optimization technique over the image grid. An octree data structure accumulates the votes coming from each depth map. A novel procedure to remove rogue points is proposed that takes into account the visibility information and the matching score of each point. Finally a texture map is built by wisely making use of both the visibility and the view angle informations. Several results show the effectiveness of the algorithm under different working scenarios.

关键词： Multiview Stereo Image-based Modelling Surface reconstruction Structure from Motion

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ACCURATE 3d TEXTUREd MOdELS OF VESSELS FOR THE IMPROVEMENT OF THE EdUCATIONAL TOOLS OF A MUSEUM

ACCURATE 3D TEXTURED MODELS OF VESSELS FOR THE IMPROVEMENT O...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Soile, S. Adam, K. Ioannidis, C. Georgopoulos, A. Natl Tech Univ Athens Sch Rural & Surveying Engn Lab Photogrammetry Athens 15780 Greece

ISBN: (纸本)9781629935201

Besides the demonstration of the findings, modern museums organize educational programs which aim to experience and knowledge sharing combined with entertainment rather than to pure learning. Toward that effort, 2d and 3d digital representations are gradually replacing the traditional recording of the findings through photos or drawings. The present paper refers to a project that aims to create 3d textured models of two lekythoi that are exhibited in the National archaeological Museum of Athens in Greece;on the surfaces of these lekythoi scenes of the adventures of Odysseus are depicted. The project is expected to support the production of an educational movie and some other relevant interactive educational programs for the museum. The creation of accurate developments of the paintings and of accurate 3d models is the basis for the visualization of the adventures of the mythical hero. The data collection was made by using a structured light scanner consisting of two machine vision cameras that are used for the determination of geometry of the object, a high resolution camera for the recording of the texture, and a dLP projector. The creation of the final accurate 3d textured model is a complicated and tiring procedure which includes the collection of geometric data, the creation of the surface, the noise filtering, the merging of individual surfaces, the creation of a c-mesh, the creation of the UV map, the provision of the texture and, finally, the general processing of the 3d textured object. For a better result a combination of commercial and in-house software made for the automation of various steps of the procedure was used. The results derived from the above procedure were especially satisfactory in terms of accuracy and quality of the model. However, the procedure was proved to be time consuming while the use of various software packages presumes the services of a specialist.

关键词： 3d textured model Museums Structured light scanner complex surfaces visualization

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PROCEdURAL MOdELING FOR RAPId-PROTOTYPING OF MULTIPLE BUILdING PHASES

PROCEDURAL MODELING FOR RAPID-PROTOTYPING OF MULTIPLE BUILDI...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Saldana, M. Johanson, C. Univ Calif Los Angeles Dept Architecture & Urban Design Los Angeles CA 90095 USA Univ Calif Los Angeles Dept Class Los Angeles CA 90095 USA

ISBN: (纸本)9781629935201

RomeLab is a multidisciplinary working group at UCLA that uses the city of Rome as a laboratory for the exploration of research approaches and dissemination practices centered on the intersection of space and time in antiquity. In this paper we present a multi-platform workflow for the rapid-prototyping of historical cityscapes through the use of geographic information systems, procedural modeling, and interactive game development. Our workflow begins by aggregating archaeological data in a GIS database. Next, 3d building models are generated from the ArcMap shapefiles in Esri CityEngine using procedural modeling techniques. A GIS-based terrain model is also adjusted in CityEngine to fit the building elevations. Finally, the terrain and city models are combined in Unity, a game engine which we used to produce web-based interactive environments which are linked to the GIS data using keyhole markup language (KML). The goal of our workflow is to demonstrate that knowledge generated within a first-person virtual world experience can inform the evaluation of data derived from textual and archaeological sources, and vice versa.

关键词： Procedural Modeling architectural reconstruction GIS Interactive Games virtual Worlds

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3d-ANTLERS: virtual reconstruction ANd THREE-dIMENSIONAL MEASUREMENT

3D-ANTLERS: VIRTUAL RECONSTRUCTION AND THREE-DIMENSIONAL MEA...

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conference on 3d virtual reconstruction and visualization of complex architectures (3d-arch)

作者： Barba, S. Fiorillo, F. de Feo, E. Univ Salerno Dept Civil Engn Salerno Italy

ISBN: (纸本)9781629935201

The main objective of this paper is to establish a procedural method for measuring and cataloguing antlers through the use of laser scanner and of a 3d reconstruction of complex modeling. The deer's antlers have been used as a test and subjected to capture and measurement. For this purpose multiple data sources techniques have been studied and compared, (also considering low-cost sensors) estimating the accuracy and its errors in order to demonstrate the validity of the process. A further development is the comparison of results with applications of digital photogrammetry, considering also cloud computing software. The study has began with an introduction to sensors, addressing the underlying characteristics of the technology available, the scope and the limits of these applications. We have focused particularly on the "structured light", as the acquisition will be completed through three-dimensional scanners: dAVId and the ARTEC MH. The first is a low-cost sensor, a basic webcam and a linear laser pointer, red coloured, that leads to acquisition of three-dimensional strips. The other one is a hand scanner;even in this case we will explain how to represent a 3d model, with a pipeline that provides data export from the "proprietary" to a "reverse engineering" software. Typically, these are the common steps to the two approaches that have been performed in WRAP format: point sampling, manual and global registration, repair normals, surface editing and texture projection. In fact, after a first and common data processing was done with the use of a software supplied with the equipment, the proto-models thus obtained were treated in Geomagic Studio, which was also chosen to allow the homogenization and standardization of data in order to make a more objective comparison. It is commonplace to observe that the editing of the digital mock-up obtained with the dAVId - which had not yet been upgraded to the 3.5 release at the time of this study - is substantially different. I

关键词： Hand scanner Photogrammetry 3d cataloguing

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