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

共 1546 条记录，以下是471-480 订阅

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3d reconstruction and Understanding of Indoor Scene Based on Single Image

3D Reconstruction and Understanding of Indoor Scene Based on...

引用

2020 International conference on virtual Reality and visualization, ICVRV 2020

作者： Xue, Junxiao Tu, Yuchun Sun, dai Software College Zhengzhou University Zhengzhou China

ISBN: (纸本)9780738142524

Given a photo of a room, through our automated system, try to reconstruct a three-dimensional scene similar to the photo. Among them, the indoor objects come from the objects in the ShapeNet model library, which enables our system to produce a high-quality output result. The method we use is to use a full convolutional neural network to train images and compare indicators, use Faster-RCNN to perform multitasking object recognition and target detection, and then iteratively optimize the position and proportion of objects in the room, so that the scene renders a three-dimensional map Best match with input photo. © 2020 IEEE.

关键词： Object recognition

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3d dETECTION ANd reconstruction EXPERIMENTS IN RIVER BASINS. 8

3D DETECTION AND RECONSTRUCTION EXPERIMENTS IN RIVER BASINS.

引用

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

作者： Palestini, C. Basso, A. Univ Adriat Studies G DAnnunzio Dept Architecture Pescara Italy

The survey and representation of river landscapes require complex operations related to the habitat identifying these environments that show heterogeneous connotations in which the anthropogenic contaminations, alternating with the peripheral areas, industrial or abandoned, are united in a territory with hybrid characteristics. In this regard it is proposed as a case study the experimentation carried out on the Pescara river basin that specifically compares two low cost detection systems comparing the results obtained to carry out environmental readings and 3d reconstructions of the territory. The operations of analysis and data acquisition include integrated procedures used with the aim of obtaining high-density 3d reconstructions of details applied on the river portions of Pescara-Aterno. Starting from the delta towards the inside, identification samples were analyzed to focus attention on the different criticalities. Integrated methodologies were employed involving the experimental use of specific software to obtain depth maps and territorial models compatible with real ones, crossing free open shared data obtained from the Google Earth Pro, photogrammetric reconstructions and information provided on site by RPAS instruments (Remoted Piloted Air System) that use the image based methodologies to carry out an in-depth scan of the territory.

关键词： Photogrammetry Google Earth 3d Reconfiguration digital terrain Model drone

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distortion-Free Camera Calibration 9

Distortion-Free Camera Calibration

引用

conference on dimensional Optical Metrology and Inspection for Practical Applications IX

作者： Yang, Bingcheng May Solut LLC 1079 Copperstone Ct Rockville MD 20852 USA

ISBN: (纸本)9781510635722;9781510635715

A universal pixel-by-pixel distortion-free camera calibration technique is described. All camera lenses will cause image distortions. An LCd flat panel can be used as an active calibration panel for camera calibration. Each sensor pixel has its ray vector in space and can be calibrated with the LCd. A set of phase shifting fringes (PSF) can be used to establish the mapping relationship between the LCd pixels and the sensor pixels. For primary camera calibration, a virtual sensor can be created on the LCd and a set of inverse mapping parameters (IMP) for each virtual pixel can be determined. The captured images can be rectified by resampling with the IMP. The output images will be distortion-free with zero geometric distortions and zero chromatic aberrations. For advanced camera calibration, all pixel ray vectors in space can be calibrated. A virtual sensor can be created on any expected planar or curvature surface in space and the IMP can be determined accordingly. After image rectification or 3d reconstruction, for every 2d pixel or 3d point cloud, the mean error will be 0, the std error will be 1/1,000 pixel pitch or smaller. The cameras can be used as non-contact 2d/3d rulers. The distortion-free calibration technique can be applied to any cameras and projectors, no matter how complex their lens structures can be. Interactive and comprehensive intensity calibrations can be made between LCd, cameras and projectors.

关键词： Camera calibration lens sensor projector PSF metrology 3d reconstruction

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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 ...

引用

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...

引用

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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