scholarly journals Use of Smartphone-Based Head-Mounted Display Devices to View a Three-Dimensional Dissection Model in a Virtual Reality Environment: Pilot Questionnaire Study

10.2196/11921 ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. e11921 ◽  
Author(s):  
Yoshihito Masuoka ◽  
Hiroyuki Morikawa ◽  
Takashi Kawai ◽  
Toshio Nakagohri
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Questionnaire Study ◽  
Virtual Reality Environment ◽  
Display Devices ◽  
Head Mounted Display

Assessment of various display devices on a virtual reality-based hand rehabilitation system

Robotica ◽  
2004 ◽  
Vol 22 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Wei-Shin Huang ◽  
Chang-Yih Shing ◽  
Chin-Ping Fung ◽  
Tien-Yow Chuang ◽  
Ming-Chang Jeng ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Display Device ◽  
Hand Rehabilitation ◽  
Data Glove ◽  
Display Devices ◽  
Head Mounted Display ◽  
Significant Difference ◽  
Rehabilitation System ◽  
Monitor Group

The purpose of the present study is to assess the effect of an auxiliary lateral image and display devices on manipulation performance in a virtual reality-based hand rehabilitation system. The system consists of a personal computer, a tracker, a data glove, and a display device. For this study, a projector, a monitor, and a head-mounted display were respectively used as the display devices to present three-dimensional virtual environments. Twelve volunteers were recruited to take a pick-and-place procedure at different levels of difficulty. Task time and collision frequency were the parameters used to evaluate the manipulation performance. It was found that the presence of an auxiliary lateral image was a significant factor only for the performance of the projector group and the monitor group. In addition, no statistically significant difference was found in the comparison between the projector group and the monitor group.

scholarly journals The environmental navigation using geometric virtual reality

2018 ◽  
Vol 10 (6) ◽  
pp. 168781401878363 ◽  
Author(s):  
Nien-Tsu Hu ◽  
Pu-Sheng Tsai ◽  
Ter-Feng Wu ◽  
Jen-Yang Chen ◽  
Lin Lee
Keyword(s):  
Virtual Reality ◽  
System Architecture ◽  
Three Dimensional ◽  
Wearable Devices ◽  
Wireless Transmission ◽  
Wearable Electronics ◽  
Virtual Reality Environment ◽  
Landscape Models ◽  
Three Dimensional Models ◽  
Animation Software

This article explores the construction of a geometric virtual reality platform for the environmental navigation. Non-panoramic photos and wearable electronics with Bluetooth wireless transmission functions are used to combine the user’s actions with the virtual reality environment in a first-person virtual reality platform. The 3ds Max animation software is used to create three-dimensional models of real buildings. These models are combined with the landscape models in Unity3d to create a virtual campus scene that matches real landscape. The wearable device included an ATMega168 chip as a microcontroller; it was connected to a three-axis accelerometer, a gyroscope, and a Bluetooth transmitter to detect and transmit various movements of the user. Although the development of the mechatronics, software, and engineering involved in the three-dimensional animation are the main objective, we believe that the methods and techniques can be modified for various purposes. After the system architecture was created and the operations of the platform were verified, wearable devices and virtual reality scenes are concluded to be able to be used together seamlessly.

scholarly journals Virtual Reality for Monitoring and Control of Electrical Power

2020 ◽  
Author(s):  
Alexandre C. Silva ◽  
Alexandre Cardoso ◽  
Edgard A. Lamounier Jr ◽  
Camilo L. Barreto Jr ◽  
Diogo M. Azevedo ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Electrical Power ◽  
Three Dimensional ◽  
Functional Information ◽  
Monitoring And Control ◽  
Virtual Reality Environment ◽  
Electric Company ◽  
New Strategy ◽  
And Control ◽  
Operation Center

This project shows the results obtained from a new strategy based on Virtual Reality techniques, which intends to minimize the issues caused on the operation of electric power substations due to the lack of spatial and functional information on the traditional operation interfaces. For this purpose, a three-dimensional interactive virtual reality environment was built in a realistic and accurate way regarding a energy electric company of Minas Gerais – Brazil (CEMIG) substation and afterwards implanted it in its operation center for tasks related to its functioning. Lastly, tests were applied to the operators to obtain results aiming at the contextualized problems.

A virtual scalpel for visualizing patients in a three-dimensional, immersive, navigable and interactive virtual reality environment

2015 ◽  
Author(s):  
Mark D. Locuson ◽  
George D. Lecakes ◽  
Anthony Aita ◽  
H. Warren Goldman ◽  
Shreekanth Mandayam ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Virtual Reality Environment

scholarly journals Overview: Virtual Reality in Medicine

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Claudio Pensieri ◽  
Maddalena Pennacchini
Keyword(s):  
Virtual Reality ◽  
Second Life ◽  
Surgical Simulation ◽  
3D Visualization ◽  
Economic Value ◽  
Three Dimensional ◽  
Communication Interface ◽  
Head Mounted Display ◽  
Wide Range ◽  
Interactive 3D

Background: Virtual Reality (VR) was defined as a collection of technological devices: “a computer capable of interactive 3D visualization, a head-mounted display and data gloves equipped with one or more position trackers”. Today, lots of scientists define VR as a simulation of the real world based on computer graphics, a three dimensional world in which communities of real people interact, create content, items and services, producing real economic value through e-Commerce.Objective: To report the results of a systematic review of articles and reviews published about the theme: “Virtual Reality in Medicine”.Methods: We used the search query string: “Virtual Reality”, “Metaverse”, “Second Life”, “Virtual World”, “Virtual Life” in order to find out how many articles were written about these themes. For the “Meta-review” we used only “Virtual Reality” AND “Review”. We searched the following databases: Psycinfo, Journal of Medical Internet Research, Isiknowledge till September 2011 and Pubmed till February 2012. We included any source published in either print format or on the Internet, available in all languages, and containing texts that define or attempt to define VR in explicit terms.Results: We retrieved 3,443 articles on Pubmed in 2012 and 8,237 on Isiknowledge in 2011. This large number of articles covered a wide range of themes, but showed no clear consensus about VR. We identified 4 general uses of VR in Medicine, and searched for the existing reviews about them. We found 364 reviews in 2011, although only 197 were pertinent to our aims: 1. Communication Interface (11 Reviews); 2. Medical Education (49 reviews); 3. Surgical Simulation (49 Reviews) and 4. Psychotherapy (88 Reviews).Conclusion: We found a large number of articles, but no clear consensus about the meaning of the term VR in Medicine. We found numerous articles published on these topics and many of them have been reviewed. We decided to group these reviews in 4 areas in order to provide a systematic overview of the subject matter, and to enable those interested to learn more about these particular topics.

Direct manipulation is better than passive viewing for learning anatomy in a three-dimensional virtual reality environment

2017 ◽  
Vol 106 ◽  
pp. 150-165 ◽  
Author(s):  
Susan Jang ◽  
Jonathan M. Vitale ◽  
Robert W. Jyung ◽  
John B. Black
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Direct Manipulation ◽  
Virtual Reality Environment ◽  
Passive Viewing ◽  
Better Than

A Computational Model for the Stereoscopic Optics of a Head-Mounted Display

1992 ◽  
Vol 1 (1) ◽  
pp. 45-62 ◽  
Author(s):  
Warren Robinett ◽  
Jannick P. Rolland
Keyword(s):  
Virtual Reality ◽  
Computational Model ◽  
Relative Position ◽  
Three Dimensional ◽  
Model Parameters ◽  
Head Mounted Display ◽  
Interpupillary Distance ◽  
Modeling Errors ◽  
Physical Geometry ◽  
Physical Objects

For stereoscopic photography or telepresence, orthostereoscopy occurs when the perceived size, shape, and relative position of objects in the three-dimensional scene being viewed match those of the physical objects in front of the camera. In virtual reality, the simulated scene has no physical counterpart, so orthostereoscopy must be defined in this case as constancy, as the head moves around, of the perceived size, shape, and relative positions of the simulated objects. Achieving this constancy requires that the computational model used to generate the graphics matches the physical geometry of the head-mounted display being used. This geometry includes the optics used to image the displays and the placement of the displays with respect to the eyes. The model may fail to match the geometry because model parameters are difficult to measure accurately, or because the model itself is in error. Two common modeling errors are ignoring the distortion caused by the optics and ignoring the variation in interpupillary distance across different users. A computational model for the geometry of a head-mounted display is presented, and the parameters of this model for the VPL EyePhone are calculated.

scholarly journals Aneurysm Surgery with Preoperative Three-Dimensional Planning in a Virtual Reality Environment: Technique and Outcome Analysis

2016 ◽  
Vol 96 ◽  
pp. 489-499 ◽  
Author(s):  
Ralf A. Kockro ◽  
Tim Killeen ◽  
Ali Ayyad ◽  
Martin Glaser ◽  
Axel Stadie ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Outcome Analysis ◽  
Aneurysm Surgery ◽  
Virtual Reality Environment

scholarly journals Simulated Site-directed Mutations in a Virtual Reality Environment as a Powerful Aid for Teaching the Three-dimensional Structure of Proteins

2009 ◽  
Vol 20 (4) ◽  
pp. 461-465 ◽  
Author(s):  
Rogelio Rodríguez-Sotres ◽  
Mireya Rodríguez-Penagos ◽  
Javier González-Cruz ◽  
Luis Rosales-León ◽  
León Patricio Martínez-Castilla
Keyword(s):  
Virtual Reality ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Virtual Reality Environment ◽  
Three Dimensional Structure ◽  
Structure Of Proteins
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