scholarly journals Visual Fatigue Alleviating in Stereo Imaging of Anaglyphs by Reducing Retinal Rivalry and Color Distortion Based on Mobile Virtual Reality Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Min Qi ◽  
Shanshan Cui ◽  
Qianmin Du ◽  
Yuelei Xu ◽  
David F. McAllister
Keyword(s):  
Virtual Reality ◽  
Color Space ◽  
Computing Methods ◽  
Stereo Image ◽  
Stereoscopic Display ◽  
Visual Fatigue ◽  
Stereo Images ◽  
Virtual Reality Technology ◽  
Color Distortion ◽  
Retinal Rivalry

Stereoscopic display is the means of showing scenes in Virtual Reality (VR). As a type of stereo images, anaglyphs can be displayed not only on the screen, but are currently the only solution of stereo images that can be displayed on paper. However, its deficiencies, like retinal rivalry and color distortion, could cause visual fatigue. To address this issue, an algorithm is proposed for anaglyph generation. Unlike previous studies only considering one aspect, it considers both retinal rivalry and color distortion at the same time. The algorithm works in the CIE L ∗ a ∗ b ∗ color space and focuses on matching the perceptual color attributes especially the hue, rather than directly minimizes the sum of the distances between the perceived anaglyph color and the stereo image pair. In addition, the paper builds a relatively complete framework to generate anaglyphs so that it is more controllable to adjust the parameters and choose the appropriate process. The subjective tests are conducted to compare the results with several techniques which generate anaglyphs including empirical methods and computing methods. Results show that the proposed algorithm has a good performance.

scholarly journals Use of virtual reality for pre-surgical planning in separation of conjoined twins: A case report

2019 ◽  
Vol 233 (12) ◽  
pp. 1327-1332 ◽  
Author(s):  
Bethany Juhnke ◽  
Alex R Mattson ◽  
Daniel Saltzman ◽  
Anthony Azakie ◽  
Eric Hoggard ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Surgical Planning ◽  
Three Dimensional ◽  
Conjoined Twins ◽  
Stereoscopic Display ◽  
Spatial Awareness ◽  
Virtual Reality Technology ◽  
Interatrial Communication ◽  
Three Dimensional Models ◽  
Surgical Teams

We describe the use of virtual reality technology for surgical planning in the successful separation of thoracopagus conjoined twins. Three-dimensional models were created from computed tomography angiograms to simulate the patient’s anatomy on a virtual stereoscopic display. Members of the surgical teams reviewed the anatomical models to localize an interatrial communication that allowed blood to flow between the two hearts. The surgical plan to close the 1-mm interatrial communication was significantly modified based on the pre-procedural spatial awareness of the anatomy presented in the virtual visualization. The virtual stereoscopic display was critical for the surgical team to successfully separate the twins and provides a useful case study for the use of virtual reality technology in surgical planning. Both twins survived the operation and were subsequently discharged from the hospital.

Design and Implementation of Virtual Royal Garden in Northern Song Dynasty with Stereoscopic Display

2011 ◽  
Vol 291-294 ◽  
pp. 2388-2392 ◽  
Author(s):  
Yan Zhang ◽  
Gang Yang
Keyword(s):  
Virtual Reality ◽  
Song Dynasty ◽  
3D Model ◽  
Stereoscopic Display ◽  
Spatial Form ◽  
Virtual Reality Technology ◽  
Programming Technique ◽  
Design And Implementation ◽  
Northern Song Dynasty ◽  
Northern Song

With the development of virtual reality technology, using the VR technique to realize landscaping planning and ancient architecture reconstruction has become a hot research and application topic. In this paper, we use VR technique to restored the scene of the famous painting which named " Riverside Scene At Qingming Festival" by Mr. Zeduan Zhang who was a famous painter in Northern Song Dynasty. In construction of the 3D ancient scene model, this paper consultes and analyses many references about the building spatial form of the imperial garden in the Northern Song Dynasty, and put forward the method for constructing the 3D model of ancient architecture. The real-time roaming system is constructed based on the VR Platform Virtools. In addition, we research and implement the stereoscopic displaying in the roaming system by using the shading programming technique of Vritools. Experimental results show that our system provides a very immersive impression for the virtual exhibition of ancient scenes. The modeling method put forward in the paper provides a good reference for the construction of ancient architecture.

Virtual classroom project

2017 ◽  
Author(s):  
Nicholas Gmeiner
Keyword(s):  
Virtual Reality ◽  
Students With Disabilities ◽  
Learning Experience ◽  
Virtual Classroom ◽  
Traditional Classroom ◽  
Video Capture ◽  
Interactive Learning Environment ◽  
Virtual Reality Technology ◽  
Virtual Classrooms ◽  
Classroom Project

This project aims to provide students with disabilities the same in class learning experience through virtual reality technology, 360-degree video capture, and the use of Arduino units. These technologies will be combined to facilitate communication between teachers in physical classrooms with students in virtual classrooms. The goal is to provide a person who is affected by a disability (which makes it hard to be in a traditional classroom) the same benefits of a safe and interactive learning environment.

Underwater Image Enhancement Method Combining color and Luminance

2020 ◽  
Vol 13 ◽  
Author(s):  
ZHAO Baiting ◽  
WANG Feng ◽  
JIA Xiaofen ◽  
GUO Yongcun ◽  
WANG Chengjun
Keyword(s):  
Image Enhancement ◽  
Color Space ◽  
Low Frequency ◽  
Brightness Enhancement ◽  
Color Distortion ◽  
Underwater Image ◽  
Enhancement Method ◽  
Frequency Components ◽  
Image Contour ◽  
Objective Indicators

Background:: Aiming at the problems of color distortion, low clarity and poor visibility of underwater image caused by complex underwater environment, a wavelet fusion method UIPWF for underwater image enhancement is proposed. Methods:: First of all, an improved NCB color balance method is designed to identify and cut the abnormal pixels, and balance the color of R, G and B channels by affine transformation. Then, the color correction map is converted to CIELab color space, and the L component is equalized with contrast limited adaptive histogram to obtain the brightness enhancement map. Finally, different fusion rules are designed for low-frequency and high-frequency components, the pixel level wavelet fusion of color balance image and brightness enhancement image is realized to improve the edge detail contrast on the basis of protecting the underwater image contour. Results:: The experiments demonstrate that compared with the existing underwater image processing methods, UIPWF is highly effective in the underwater image enhancement task, improves the objective indicators greatly, and produces visually pleasing enhancement images with clear edges and reasonable color information. Conclusion:: The UIPWF method can effectively mitigate the color distortion, improve the clarity and contrast, which is applicable for underwater image enhancement in different environments.

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