Implementation of a Quality Measurement Software for Virtual Reality Content on a head mount display

2019 ◽  
Author(s):  
Ko Takayama ◽  
Yushi Machidori ◽  
Kaoru Sugita
Keyword(s):  
Virtual Reality ◽  
Quality Measurement ◽  
Head Mount Display ◽  
Measurement Software

Development of a Virtual Reality Experience System for Interior Damage Due to an Earthquake – Utilizing E-Defense Shake Table Test –

2017 ◽  
Vol 12 (5) ◽  
pp. 882-890 ◽  
Author(s):  
Takuzo Yamashita ◽  
Mahendra Kumar Pal ◽  
Kazutoshi Matsuzaki ◽  
Hiromitsu Tomozawa ◽  
◽  
...  
Keyword(s):  
Virtual Reality ◽  
Questionnaire Survey ◽  
Shake Table ◽  
Disaster Prevention ◽  
Head Mount Display ◽  
Prevention Education ◽  
Vibration Data ◽  
Rc Structure ◽  
Multiple Devices ◽  
Interior Damage

To construct a virtual reality (VR) experience system for interior damage due to an earthquake, VR image contents were created by obtaining images, sounds, and vibration data from multiple devices, with synchronization information, in a room at the 10thfloor of 10-story RC structure tested at E-Defense shake table. An application for displaying 360-degree images of interior damage using a head mount display (HMD) was developed. The developed system was exhibited in public disaster prevention events, and then a questionnaire survey was conducted to assess usefulness of VR experience in disaster prevention education.

Upper Extremity Rehabilitation Using Fully Immersive Virtual Reality Games With a Head Mount Display: A Feasibility Study

PM&R ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 257-262 ◽  
Author(s):  
Seung Hak Lee ◽  
Hae‐Yoon Jung ◽  
Seo Jung Yun ◽  
Byung‐Mo Oh ◽  
Han Gil Seo
Keyword(s):  
Virtual Reality ◽  
Upper Extremity ◽  
Feasibility Study ◽  
Immersive Virtual Reality ◽  
Head Mount Display ◽  
Upper Extremity Rehabilitation

scholarly journals Psychophysiological Alteration After Virtual Reality Experiences Using Smartphone-Assisted Head Mount Displays: An EEG-Based Source Localization Study

2019 ◽  
Vol 9 (12) ◽  
pp. 2501 ◽  
Author(s):  
Jeong-Youn Kim ◽  
Jae-Beom Son ◽  
Hyun-Sung Leem ◽  
Seung-Hwan Lee
Keyword(s):  
Virtual Reality ◽  
Source Localization ◽  
Significant Negative Correlation ◽  
Alpha Band ◽  
Head Mount Display ◽  
Functional Changes ◽  
Band Power ◽  
Before And After ◽  
Electroencephalogram Eeg ◽  
Better Than

Brain functional changes could be observed in people after an experience of virtual reality (VR). The present study investigated cyber sickness and changes of brain regional activity using electroencephalogram (EEG)-based source localization, before and after a VR experience involving a smartphone-assisted head mount display. Thirty participants (mean age = 25 years old) were recruited. All were physically healthy and had no ophthalmological diseases. Their corrected vision was better than 20/20. Resting state EEG and the simulator sickness questionnaire (SSQ) were measured before and after the VR experience. Source activity of each frequency band was calculated using the sLORETA program. After the VR experience, the SSQ total score and sub scores (nausea, oculomotor symptoms, and disorientation) were significantly increased, and brain source activations were significantly increased: alpha1 activity in the cuneus and alpha2 activity in the cuneus and posterior cingulate gyrus (PCG). The change of SSQ score (after–before) showed significant negative correlation with the change of PCG activation (after–before) in the alpha2 band. The study demonstrated increased cyber sickness and increased alpha band power in the cuneus and PCG after the VR experience. Reduced PCG activation in alpha band may be associated with the symptom severity of cyber sickness.

scholarly journals Effect of vestibular exercise and optokinetic stimulation using virtual reality in persistent postural-perceptual dizziness

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seo-Young Choi ◽  
Jae-Hwan Choi ◽  
Eun Hye Oh ◽  
Se-Joon Oh ◽  
Kwang-Dong Choi
Keyword(s):  
Virtual Reality ◽  
Daily Living ◽  
Analogue Scale ◽  
Optokinetic Stimulation ◽  
Virtual Reality System ◽  
Head Mount Display ◽  
Dizziness Handicap Inventory ◽  
Gait Function ◽  
Visual Vertigo

AbstractTo determine the effect of customized vestibular exercise (VE) and optokinetic stimulation (OS) using a virtual reality system in patients with persistent postural-perceptual dizziness (PPPD). Patients diagnosed with PPPD were randomly assigned to the VE group or VE with OS group. All participants received VE for 20 min using a virtual reality system with a head mount display once a week for 4 weeks. The patients in the VE with OS group additionally received OS for 9 min. We analysed the questionnaires, timed up-to-go (TUG) test, and posturography scores at baseline and after 4 weeks. A total of 28 patients (median age = 74.5, IQR 66–78, men = 12) completed the intervention. From baseline to 4 weeks, the dizziness handicap inventory, activities of daily living (ADL), visual vertigo analogue scale, and TUG improved in the VE group, but only ADL and TUG improved in the VE with OS group. Patients with severe visual vertigo improved more on their symptoms than patients with lesser visual vertigo (Pearson’s p = 0.716, p < 0.001). Our VE program can improve dizziness, quality of life, and gait function in PPPD; however, additional optokinetic stimuli should be applied for individuals with visual vertigo symptoms.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

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