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3d reconstruction system and multiobject local tracking algorithm designed for billiards

APPLIEd INTELLIGENCE 2023年第19期53卷 21543-21575页

作者： Rodriguez-Lozano, Francisco J. J. Gamez-Granados, Juan C. C. Martinez, Hector Palomares, Jose M. M. Olivares, Joaquin Univ Cordoba Dept Elect & Comp Engn Edificio Leonardo da Vinci Campus Rabanales Cordoba 14071 Spain

The use of virtual reality or augmented reality systems in billiards sports are useful tools for pure entertainment or improving the player's skills. depending on the purpose of these systems, tracking algorithms based on computer vision must be used. These algorithms are especially useful in systems aiming to reconstruct the trajectories followed by the balls after a strike. However, depending on the billiard modality, the problem of tracking multiple small identical objects, such as balls, is a complex task. In addition, when an amateur or nontop professional player uses low-frame-rate and low-resolution devices, problems such as blurred balls, blurred contours, or fuzzy edges, among others, arise. These effects have a negative impact on ball-tracking accuracy and reconstruction quality. Thus, this work proposes two contributions. The first contribution is a new tracking algorithm called "multiobject local tracking (MOLT)". This algorithm can track balls with high precision and accuracy even with motion blur caused by low-resolution and low-frame-rate devices. Moreover, the proposed MOLT algorithm is compared with nine tracking methods and four different metrics, outperforming the rest of the methods in the majority of the cases and providing a robust solution. The second contribution is a whole system to track (using the MOLT algorithm) and reconstruct the movements of the balls on a billiard table in a 3d virtual world using computer vision. The proposed system covers all steps from image capture to 3d reconstruction. The 3d reconstruction results have been qualitatively evaluated by different users through a series of questionnaires, obtaining an overall score of 7.6 (out of 10), which indicates that the system is a promising and useful tool for training. Finally, both the MOLT algorithm and the reconstruction system are tested in three billiard modalities: blackball, carom billiards, and snooker.

关键词： Multi-object Tracking Computer vision virtual reality Billiard 3d reconstruction

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AN APPLICATION FOR CULTURAL HERITAGE IN ERASMUS PLACEMENT. SURVEYS ANd 3d CATALOGUING ARCHAEOLOGICAL FINdS IN MERIdA (SPAIN) 4

AN APPLICATION FOR CULTURAL HERITAGE IN ERASMUS PLACEMENT. S...

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

作者： Barba, S. Fiorillo, F. Ortiz Coder, P. d'Auria, S. de Feo, E. UNISA Dept Civil Engn I-84084 Salerno Italy GAVLE Merida 06800 Badajoz Spain

Man has always had the need to live with his past, with its places and its artefacts. The reconstructions, the economical changes, the urbanization and its speculations have devastated whole cities, changed the faces of their historical centers, changed the relationship between the new and the old. Also the millenarian 'rest' of the archaeological findings, and therefore the respect towards those ancient civilizations, has been troubled. Our continent is rich in masterpieces that the modern man are not able to protect and pass on to the future, it is commonplace to observe that the modern 'civilization' has cemented and suffocated the ancient city of Pompeii, or even worse, failed to protected it. Walking in the archaeological area of Paestum it can be noticed how just sixty years ago, no one had the slightest concern of fencing the amphitheatre and the Roman forum, or entire houses and shops, to lay a carpet of tar or simple to build constructions completely inferior compared to those majestic Greek temples. The engineers and the architects should be held responsible for this as based on their scientific and humanistic sensibility;they should bring together the man with his surroundings in the complete respects of the historical heritage. The interest in ancient began to change nearly three decades ago since it was realized that the "Cultural Heritage" is a major tourist attraction and, if properly managed and used, it can be an economical cornerstone. Today, thanks to survey and the 3d graphics, which provide powerful new tools, we are witnessing a new and real need for the conservation, cataloguing and enhancement as a way to revive our archaeological sites. As part of a major laboratory project, artefacts from the Roman period (I and II century b.C.), found in the Spanish city of Merida, declared World Heritage by UNESCO in 1993, were acquired with a 3d laser scanner VIVId 910, and then catalogued. Based on these brief comments we wanted to direct the work carri

关键词： Vivid 910 and Geomagic Studio Texture 3d reconstruction PdF visualization

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Quality Assessment Framework for 3d Face reconstruction Models 9

Quality Assessment Framework for 3D Face Reconstruction Mode...

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International conference on virtual Reality and visualization (ICVRV)

作者： Zhu, Yunrui Luo, Xun Shi, Chu Wang, Xinyu Kong, dehao Tianjin Univ Technol Pervas & Visual Comp Grp Tianjin Peoples R China

ISBN: (纸本)9781728147529

The 3d face quality assessment framework is used for quality inspection of the 3d face reconstructions models. It mainly detects the holes of the 3d face model, counts the number of holes, and returns the data results to the HTML page. This work can further improve the management of 3d reconstruction models, detect the quality of modeling, improve the utilization of the model, prepare for the subsequent development of 3d reconstruction model, feature point extraction, etc., which is of great significance for industry efficiency optimization.

关键词： 3d face reconstruction hole detection quality assessment boundary extraction

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AUGMENTEd EXPERIENCE TO dISSEMINATE CULTURAL HERITAGE: HOUSE OF COMMONS WINdOWS, PARLIAMENT HILL NATIONAL HISTORIC SITE (CANAdA) 8

AUGMENTED EXPERIENCE TO DISSEMINATE CULTURAL HERITAGE: HOUSE...

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

作者： Carrion-Ruiz, Berta Blanco-Pons, Silvia duong, Michelle Chartrand, Joshua Li, Melanie Prochnau, Kristine Fai, Stephen Luis Lerma, Jose Univ Politecn Valencia Dept Cartog Engn Photogrammetry & Laser Scanning Res Grp GIFLE Val Valencia Spain Carleton Univ Carleton Immers Media Studio Ottawa ON Canada

The use of photogrammetry and terrestrial laser scanning for building information modelling (BIM) in the documentation and conservation of Cultural Heritage (CH) is now well established. By combining BIM with the latest visualization technologies, powerful, semi-immersive experiences can be developed to enhance the dissemination of CH. In semi-immersive experiences such as Augmented Reality (AR), digital content can be overlapped on to physical spaces, providing a new way to interact with both the physical space and the digital content. This paper discusses the translation of a digital object created using BIM, into a physical object and the utilisation of this physical object as a trigger for an AR experience. The case study looks at one of the neo-Gothic window frames from the House of Commons in the Centre Block of the Parliament Hill National Historic Site, in Ottawa, Canada. The window frame is one in a series that represents a Canadian province or territory with a stained glass feature that includes floral emblems and heraldic symbols from the respective provincial or territorial shield. The frame in this case study corresponds to the stained glass window of five provinces. Using the replica frame as a target, the user can select which stained glass windows they would like to view in the AR application. Through these combined technologies, we argue that CH can be revealed in a more interactive way and therefore more engaging manner - making even inaccessible architectural details readily available to the public.

关键词： augmented reality AR BIM Cultural Heritage markerless tracking 3d modelling

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A Large-scale Scene display System Based on WebGL 8

A Large-scale Scene Display System Based on WebGL

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8th International conference on virtual Reality and visualization (ICVRV)

作者： Jiang, Wencong Li, Yao Qi, Yue Beihang Univ State Key Lab Virtual Real Technol & Syst Unit PLA 91439 Beijing Peoples R China Beihang Univ State Key Lab Virtual Real Technol & Syst Qingdao Res Inst Beijing Peoples R China

ISBN: (纸本)9781538684979

In recent decades, computer vision has been a hot area of computer research while 3d reconstruction is one of the hot topics. With the improvement of 3d reconstruction theory and the rapid development of computer hardware technology, the reconstructed 3d models are enlarging in scale and increasing in complexity. Combining the aerial image of UAV with the 3d reconstruction of sequence images, it is of great value to carry out relevant research on the problem of 3d reconstruction of outdoor scenes. The fast rendering of these large-scale scene models is a challenge. At the same time, with the advancement of the HMTL5 specification, browsers have become more and more powerful, and WebGL has gradually gained support from more and more devices. The 3d rendering of the BS architecture will be the future direction of the rendering engine. The browser does not need to install the client program, which is convenient for users to access and process in any environment. Therefore, the large-scale scene display system based on web architecture is more convenient. In this paper, we designed a real-time display system for large-scale scenes, and studied WebGL based rendering frame techniques.

关键词： 3d reconstruction Large-scale scene Rendering System LOd WebGL

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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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MEASUREd MOdEL, THEORETICAL MOdEL ANd REPRESENTEd MOdEL: THE SO CALLEd "ARCH OF dRUSUS" IN ROME 4

MEASURED MODEL, THEORETICAL MODEL AND REPRESENTED MODEL: THE...

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

作者： Canciani, M. Maestri, d. Spadafora, G. Manacorda, d. di Cola, V. Univ Roma Tre Dipsa I-00185 Rome Italy Dipartimento Studi Stor Artist Archeol & Conserva I-00185 Rome Italy

The Arch of drusus is a complex building, stratified over time. It isn't possible to advance only one hypothesis about its origin, but its several transformations may be given some interpretations. The difficulty lies in the coexistence of two structures, typologically and chronologically different, in a single monument: an original structure which can be related to a commemorative travertine arch sheathed in marble, dating back to the Imperial Age, which probably had three fornices and a later structure reused in the III century as an aqueduct arch and monumentalized again with the application of decorated architectural elements on the southern facade. In order to provide a graphic description as much accurate as possible from the metric-dimensional point of view and as much detailed as possible in all the elements which form the building, a new survey methodology has been tested. It uses different kinds of systems - instrumental, topographic and GPS, photogrammetric and direct traditional - which complement each other, in order to render a three-dimensional computerized reference model. The analysis process of the monument, made from what emerged from the archaeological analysis, thanks to the carrying out of different navigable models, has been developed making, in the early stage, a represented model subsequently detailed on the basis of the incongruities detected in the survey.

关键词： Photogrammetry Archaeology Surveying Measured Model Theoretical Model Represented Model Integration Representation

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Sv3dvision: 3d reconstruction and visualization from a single view

Sv3dvision: 3d reconstruction and visualization from a singl...

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2005 virtual reconstruction and visualization of complex architectures, 3d-ARCH 2005

作者： Aguilera, d.G. Gómez Lahoz, J. Finat Codes, J. High Polytechnic School Ávila Univ. of Salamanca Spain MoBiVA Group Univ. of Valladolid Lab.2.2 Building I+D Spain

Nowadays, there is a huge proliferation of software based on traditional image-based 3d reconstruction methods which use multiple images to extract 3d models. However, sometimes it is not possible to obtain such images, mainly when damaged or destroyed buildings need to be documented and only single photographs or paintings exist or even when working with multiple images, parts of the scene appear in only one image due to occlusions or lack of features to match between images. This paper presents the sv3dVision software, a tool developed for the 3d reconstruction and visualization from a single view which integrates approaches of Photogrammetry, Computer Vision and Computer Graphics. © 2005 International Society for Photogrammetry and Remote Sensing. All rights reserved.

关键词： visualization

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3d reconstruction of organ from CT images and visualization in a virtual reality environment

3D reconstruction of organ from CT images and visualization ...

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IEEE Colombian conference on Applications of Computational Intelligence (IEEE ColCACI)

作者： Galeano Galeano, Sara daniela Mora Gonzalez, Miguel Esteban Espinosa Medina, Ricardo Alonso Univ ECCI Dept Ingn Biomed Bogota Colombia

ISBN: (纸本)9781665435345

virtual reality (VR) presents objects or simulated scenes to reproduce situations in a way that is very similar to the real thing. In medicine, processing and 3d reconstruction of medical images is an important step in VR that has had significant breakthroughs. We propose a methodology for processing medical images (dICOM), to segment organs, reconstruct structures in 3d and represent structures in a VR environment, in order to provide the specialist with an alternative tool for the analysis of medical images. We present a dICOM image processing method based on area differentiation and 3d reconstruction by the 'isodurface' and 'alpha-shape' methods for the creation of a virtual environment in Blender. different studies shows the benefits of VR applied to clinical practice, adding the uses they have as educational tool. Improved 3d segmentation and reconstruction methods are needed to obtain more detailed structures and better definition to be used in routine procedures.

关键词： virtual reality medical images segmentation 3d reconstruction visualization

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ASSESSING PATHOLOGIES ON VILLAMAYOR STONE (SALAMANCA, SPAIN) BY TERRESTRIAL LASER SCANNER INTENSITY dATA 6

ASSESSING PATHOLOGIES ON VILLAMAYOR STONE (SALAMANCA, SPAIN)...

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

作者： Garcia-Talegon, J. Calabres, S. Fernandez-Lozano, J. Inigo, A. C. Herrero-Fernandez, H. Arias-Perez, B. Gonzalez-Aguilera, d. Univ Salamanca Dept Geol Fac Sci E-37008 Salamanca Spain Univ Salamanca Dept Cartog & Land Engn High Sch Avila Avila Spain Salamanca CSIC Spanish Natl Res Council Inst Recursos Nat & Agrobiol Salamanca Salamanca Spain

ISBN: (纸本)9781629935201

This paper deals with the assessing of pathologies in facades using a variety of intensity data provided by different terrestrial laser scanner. In particular, a complex building built in the Villamayor Stone that is to be candidate as a Global Heritage Stone Resource has been chosen as study case. The Villamayor Stone were quarrying for the construction and ornamentation of monuments in Salamanca, declared World Heritage City by UNESCO in 1988. The objective of this paper is to assess the pathologies of Villamayor Stone and compare the results obtained through the laser techniques with the classical techniques of mapped pathologies (i.e. visual inspection). For that intensity data coming from laser scanners will be used as non-destructive techniques applied to the facades and several retired plaques (after of building restoration) of Villamayor Stone with pathologies (fissures, scales, loss of matter, humidity/biological colonization) carried to the laboratory. Subsequently it will perform different comparisons between the accuracy reached with the different sensors and a high precision model setup on laboratory which performs as "ground truth". In particular, the following objectives will be pursued: i) accuracy assessment of the results obtained in in situ and laboratory;ii) an automation or semi-automation of the detection of pathologies in Villamayor Stone;iii) discriminate the different types of Villamayor Stone used in the facades in function of the radiometric response;iv) establish a methodology for detection and assessing of pathologies based on laser scanner intensity data applied to monuments and modern buildings built in Villamayor Stone.

关键词： Pathologies Cultural Heritage Villamayor Stone Terrestrial laser scanner Photogrammetry Single-lens reflex camera Remote sensing Supervised classification

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