Application of cyber-physical systems for safety training of personnel of the marine on-board simulator

2020 ◽  
pp. 209-213
Author(s):  
Д.А. Татаренков ◽  
Г.Г. Рогозинский ◽  
И.Г. Малыгин ◽  
А.В. Богданов
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
Three Dimensional ◽  
3D Models ◽  
Cyber Physical Systems ◽  
Highly Qualified ◽  
Physical Systems ◽  
Emergency Situations ◽  
Three Dimensional Modeling ◽  
Combination Of Methods

В данной статье представлена улучшенная технология обучения персонала морских судов. Одной из особенностей этой технологии является применение виртуальной реальности для моделирования рабочего пространства персонала и нештатных ситуаций на рабочих местах. Рассматриваемая технология может быть использована для создания тренажеров морских судов с применением киберфизических систем. Отработка техники безопасности на море в безопасной среде возможна благодаря комбинированию методов рендеринга виртуального рабочего пространства и частичного воспроизведения элементов управления судна в виде интерфейсов взаимодействия обучаемого со средой виртуальной реальности тренажёра. Моделирование непредвиденных обстоятельств - простой и эффективный метод тренировки, когда у члена экипажа есть определенный запас времени. Для формирования пространства в виртуальной среде, как правило, используется метод трёхмерного моделирования объектов, что требует предварительные обмеры реальных объектов, создание технических чертежей. Этот процесс занимает большое количество времени и требует высококвалифицированный персонал для обработки материала и воссоздания помещений и предметов в виде 3D-моделей. Основная цель этой статьи - представить прототип технологии, с помощью которой можно синтезировать дополнительные ракурсы в виртуальной среде на основе реальных изображений и их карт глубины, что значительно сокращает время разработки модели корабля для создания его симулятора. This article presents an improved process for training ship personnel. One of the features of this process is the use of virtual reality to simulate the workspace of personnel and emergency situations at workplaces. The process in question can be used to create simulators for sea vessels using cyber-physical systems. Practicing safety at sea in a safe environment is possible due to the combination of methods for rendering a virtual workspace and partial implementation of ship controls in the form of interfaces for interaction of a trainee with the virtual reality environment of the simulator. Simulation of contingencies is a simple and effective training method when the crew member has a certain amount of time. To form space in a virtual environment, as a rule, the method of three-dimensional modeling of facilities is used, which requires making preliminary measurements of real facilities, creating technical drawings. This process takes a lot of time and requires highly qualified personnel to process the material and recreate the premises and objects in the form of 3D models. The main goal of this article is to show a prototype of the process that can be used to synthesize additional perspectives in a virtual environment based on real images and their depth maps, which significantly reduces a development time for a ship model to create its simulator.

scholarly journals Crowd behaviour during high-stress evacuations in an immersive virtual environment

2016 ◽  
Vol 13 (122) ◽  
pp. 20160414 ◽  
Author(s):  
Mehdi Moussaïd ◽  
Mubbasir Kapadia ◽  
Tyler Thrash ◽  
Robert W. Sumner ◽  
Markus Gross ◽  
...  
Keyword(s):  
Virtual Environments ◽  
Virtual Environment ◽  
Human Subjects ◽  
High Stress ◽  
Three Dimensional ◽  
Real Life ◽  
Social Conventions ◽  
Emergency Situations ◽  
Crowd Behaviour ◽  
The Individual

Understanding the collective dynamics of crowd movements during stressful emergency situations is central to reducing the risk of deadly crowd disasters. Yet, their systematic experimental study remains a challenging open problem due to ethical and methodological constraints. In this paper, we demonstrate the viability of shared three-dimensional virtual environments as an experimental platform for conducting crowd experiments with real people. In particular, we show that crowds of real human subjects moving and interacting in an immersive three-dimensional virtual environment exhibit typical patterns of real crowds as observed in real-life crowded situations. These include the manifestation of social conventions and the emergence of self-organized patterns during egress scenarios. High-stress evacuation experiments conducted in this virtual environment reveal movements characterized by mass herding and dangerous overcrowding as they occur in crowd disasters. We describe the behavioural mechanisms at play under such extreme conditions and identify critical zones where overcrowding may occur. Furthermore, we show that herding spontaneously emerges from a density effect without the need to assume an increase of the individual tendency to imitate peers. Our experiments reveal the promise of immersive virtual environments as an ethical, cost-efficient, yet accurate platform for exploring crowd behaviour in high-risk situations with real human subjects.

scholarly journals Processing Three-Dimensional Models of Archaeological Artifacts

2021 ◽  
Vol 20 (7) ◽  
pp. 48-61
Author(s):  
Pavel V. Chistyakov ◽  
Ekaterina N. Bocharova ◽  
Ksenia A. Kolobova
Keyword(s):  
Three Dimensional ◽  
3D Models ◽  
International Standards ◽  
Post Processing ◽  
Three Dimensional Model ◽  
Scaled Model ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Dimensional Models ◽  
Three Dimensional Models

This article provides a detailed account of the process of scanning, post-processing and further manipulation of three-dimensional models obtained with structured light scanners. Purpose. The purpose of the study is determined by the need for national archaeologists to learn the methods of three-dimensional modeling for the implementation of scientific research corresponding to international standards. Unfortunately, this direction in national archaeology began to develop in a relatively recent time and there is a lag in the application of three-dimensional modeling of national archaeology compared to the world level. Results. Any archaeological, experimental or ethnographic artifact can be used for three-dimensional scanning. To perform post-processing of three-dimensional models it is necessary to carry out primary scanning of an artifact by one of the existing algorithms. The algorithm for creating models, their positioning, simplification, saving in various formats and export is described. The main sequence of 3D models post-processing includes: processing of groups of scanned projections (their cleaning and alignment), creation of artifact model and processing/rectification of the resulting model using special software. Conclusion. As a result of correct implementation of the algorithm, the researcher receives a scaled model completely corresponding to the original artifact. Obtaining a scalable, texture-free three-dimensional model of the artifact, which fully corresponds to the original and exceeds a photograph in the quality of detail transfer, allows a scientist to conduct precise metric measurements and any procedures of non-invasive manipulation of the models. The ability to access a database of three-dimensional models of archaeological collections greatly simplifies the work of archaeologists, especially in situations when country borders are closed.

scholarly journals Procesos de documentación arqueológica y generación de modelos virtuales

2011 ◽  
Vol 2 (3) ◽  
pp. 65 ◽  
Author(s):  
Josep Blasco Senabre ◽  
Sebastián Varea ◽  
Fernando Cotino Vila ◽  
Albert Ribera Lacomba ◽  
Oreto García Puchol
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
3D Models ◽  
Present Communication ◽  
Archaeological Excavation ◽  
Great Range ◽  
The Times

<p>In the present communication we offer some examples that illustrate the methodological corpus applied by our company (Global S.L) in relation with the photogrametrical documentation and the virtual reality in the field of the archaeology. The use of these technologies of computerized documentation offers a great range of possibilities for the graphic documentation of an archaeological excavation, allowing to generate planimetry and pertinent sections and to improve the times in the process of obtaining of information. The possibility of producing 3D models supposes an essential addition to show in a three –dimensional way the current condition of the monument, as well as for its virtual recreation by means of the technologies of virtual reality and increased reality.</p>

A Framework for Designing Component Shapes in a Virtual Reality Environment

1997 ◽  
Author(s):  
Tushar H. Dani ◽  
Rajit Gadh
Keyword(s):  
Virtual Reality ◽  
Virtual Environment ◽  
User Interfaces ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Human Interaction ◽  
Prototype System ◽  
Virtual Design ◽  
Cad System ◽  
Interactive Editing

Abstract Despite advances in Computer-Aided Design (CAD) and the evolution of the graphical user interfaces, rapid creation, editing and visualization of three-dimensional (3D) shapes remains a tedious task. Though the availability of Virtual Reality (VR)-based systems allows enhanced three-dimensional interaction and visualization, the use of VR for ab initio shape design, as opposed to ‘importing’ models from existing CAD systems, is a relatively new area of research. Of interest are computer-human interaction issues and the design and geometric tools for shape modeling in a Virtual Environment (VE). The focus of this paper is on the latter i.e. in defining the geometric tools required for a VR-CAD system and in describing a framework that meets those requirements. This framework, the Virtual Design Software Framework (VDSF) consists of the interaction and design tools, and an underlying geometric engine that provides the representation and algorithms required by these tools. The geometric engine called the Virtual Modeler uses a graph-based representation (Shape-Graph) for modeling the shapes created by the user. The Shape-Graph facilitates interactive editing by localizing the effect of editing operations and in addition provides constraint-based design and editing mechanisms that are useful in a 3D interactive virtual environment. The paper concludes with a description of the prototype system, called the Virtual Design Studio (VDS), that is currently being implemented.1.

Visiting Tourist Landmarks in Virtual Reality Systems by Real-Walking

2010 ◽  
pp. 180-193 ◽  
Author(s):  
F. Steinicke ◽  
G. Bruder ◽  
J. Jerald ◽  
H. Frenz
Keyword(s):  
Virtual Reality ◽  
Virtual Environments ◽  
Virtual Environment ◽  
User Interfaces ◽  
Large Scale ◽  
Three Dimensional ◽  
Interaction Space ◽  
Immersive Virtual Environments ◽  
Redirected Walking ◽  
Virtual City

In recent years virtual environments (VEs) have become more and more popular and widespread due to the requirements of numerous application areas in particular in the 3D city visualization domain. Virtual reality (VR) systems, which make use of tracking technologies and stereoscopic projections of three-dimensional synthetic worlds, support better exploration of complex datasets. However, due to the limited interaction space usually provided by the range of the tracking sensors, users can explore only a portion of the virtual environment (VE). Redirected walking allows users to walk through large-scale immersive virtual environments (IVEs) such as virtual city models, while physically remaining in a reasonably small workspace by intentionally injecting scene motion into the IVE. With redirected walking users are guided on physical paths that may differ from the paths they perceive in the virtual world. The authors have conducted experiments in order to quantify how much humans can unknowingly be redirected. In this chapter they present the results of this study and the implications for virtual locomotion user interfaces that allow users to view arbitrary real world locations, before the users actually travel there in a natural environment.

Letter to the Editor Regarding “Immersive Three-Dimensional Modeling and Virtual Reality for Enhanced Visualization of Operative Neurosurgical Anatomy”

2020 ◽  
Vol 137 ◽  
pp. 500-501
Author(s):  
Dimitrios Chytas ◽  
Efstathios Chronopoulos ◽  
Marios Salmas ◽  
George C. Babis ◽  
Maria-Kyriaki Kaseta ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Letter To The Editor

scholarly journals Panoramic Display and Planning Simulation of Civil Engineering Project Based on Virtual Reality Technology

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zheng Wang ◽  
Chang Liu ◽  
Bin Song
Keyword(s):  
Virtual Reality ◽  
Civil Engineering ◽  
Effective Means ◽  
Three Dimensional ◽  
Project Planning ◽  
Engineering Industry ◽  
Engineering Project ◽  
Theoretical Concepts ◽  
Three Dimensional Modeling ◽  
Result Analysis

In the traditional civil engineering industry, only abstract theoretical concepts are applied to express complex realistic contents, but this method of information transmission is sometimes very limited for engineering participants, because its expression is not comprehensive and specific and also makes the recipients have difficulty in understanding its information. The rise and development of virtual reality (VR) technology has become a good assistant to overcome this difficulty, providing an extremely effective means for displaying and simulating civil engineering project in real time. This paper introduced the methods and principles of VR platform system and structure dynamic analysis, conducted virtual scene design and three-dimensional modeling of civil engineering project, analyzed the synthetic debugging and simulation roaming of the virtual environment, proposed the engineering model of virtual construction process and planning structure calculation, discussed the realization method of virtual project management and visualization, and finally performed the simulation and its result analysis of panoramic display and planning of civil engineering project based on VR technology. The results show that the VR technology can simulate various environments and activities of civil engineering projects in advance, analyze the rationality of various schemes, and modify their different functional parameters, so it can achieve the simulation optimization of project planning, design, and construction.

Three Dimensional Modeling of Buildings Using Three Dimensional Laser Scanning Data

2012 ◽  
Vol 594-597 ◽  
pp. 2398-2401
Author(s):  
Dong Ling Ma ◽  
Jian Cui ◽  
Fei Cai
Keyword(s):  
Point Cloud ◽  
Laser Scanning ◽  
3D Visualization ◽  
Cloud Model ◽  
Three Dimensional ◽  
3D Models ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Feature Lines ◽  
Point Cloud Model

This paper provides a scheme to construct three dimensional (3D) model fast using laser scanning data. In the approach, firstly, laser point cloud are scanned from different scan positions and the point cloud coming from neighbor scan stations are spliced automatically to combine a uniform point cloud model, and then feature lines are extracted through the point cloud, and the framework of the building are extracted to generate 3D models. At last, a conclusion can be drawn that 3D visualization model can be generated quickly using 3D laser scanning technology. The experiment result shows that it will bring the application model and technical advantage which traditional mapping way can not have.

Conceptual Three-Dimensional Modeling Using Intuitive Gesture-Based Midair Three-Dimensional Sketching Technique

2018 ◽  
Vol 18 (4) ◽  
Author(s):  
Jinmiao Huang ◽  
Rahul Rai
Keyword(s):  
User Study ◽  
Low Cost ◽  
Three Dimensional ◽  
3D Models ◽  
Interaction Technique ◽  
Three Dimensional Modeling ◽  
Study Results ◽  
Novice Users ◽  
Technical Solutions ◽  
3D Shapes

We introduce an intuitive gesture-based interaction technique for creating and manipulating simple three-dimensional (3D) shapes. Specifically, the developed interface utilizes low-cost depth camera to capture user's hand gesture as the input, maps different gestures to system commands and generates 3D models from midair 3D sketches (as opposed to traditional two-dimensional (2D) sketches). Our primary contribution is in the development of an intuitive gesture-based interface that enables novice users to rapidly construct conceptual 3D models. Our development extends current works by proposing both design and technical solutions to the challenges of the gestural modeling interface for conceptual 3D shapes. The preliminary user study results suggest that the developed framework is intuitive to use and able to create a variety of 3D conceptual models.

Influence of Physical Characteristics of Routes on Distance Cognition in Virtual Environments

2005 ◽  
Vol 32 (5) ◽  
pp. 777-785 ◽  
Author(s):  
Ebru Cubukcu ◽  
Jack L Nasar
Keyword(s):  
Virtual Reality ◽  
Virtual Environments ◽  
Virtual Environment ◽  
Real World ◽  
Three Dimensional ◽  
Spatial Behavior ◽  
Self Report ◽  
Parking Garage ◽  
The Real ◽  
Predicting Behavior

Discrepanices between perceived and actual distance may affect people's spatial behavior. In a previous study Nasar, using self report of behavior, found that segmentation (measured through the number of buildings) along the route affected choice of parking garage and path from the parking garage to a destination. We recreated that same environment in a three-dimensional virtual environment and conducted a test to see whether the same factors emerged under these more controlled conditions and to see whether spatial behavior in the virtual environment accurately reflected behavior in the real environment. The results confirmed similar patterns of response in the virtual and real environments. This supports the use of virtual reality as a tool for predicting behavior in the real world and confirms increases in segmentation as related to increases in perceived distance.

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