Construction and Optimization of Three-Dimensional Disaster Scenes within Mobile Virtual Reality

Abstract

Because mobile virtual reality (VR) is both mobile and immersive, three-dimensional (3D) visualizations of disaster scenes based in mobile VR enable users to perceive and recognize disaster environments faster and better than is possible with other methods. To achieve immersion and prevent users from feeling dizzy, such visualizations require a high scene-rendering frame rate. However, the existing related visualization work cannot provide a sufficient solution for this purpose. This study focuses on the construction and optimization of a 3D disaster scene in order to satisfy the high frame-rate requirements for the rendering of 3D disaster scenes in mobile VR. First, the design of a plugin-free browser/server (B/S) architecture for 3D disaster scene construction and visualization based in mobile VR is presented. Second, certain key technologies for scene optimization are discussed, including diverse modes of scene data representation, representation optimization of mobile scenes, and adaptive scheduling of mobile scenes. By means of these technologies, smartphones with various performance levels can achieve higher scene-rendering frame rates and improved visual quality. Finally, using a flood disaster as an example, a plugin-free prototype system was developed, and experiments were conducted. The experimental results demonstrate that a 3D disaster scene constructed via the methods addressed in this study has a sufficiently high scene-rendering frame rate to satisfy the requirements for rendering a 3D disaster scene in mobile VR.

The Case for Low-Cost, Personalized Visualization for Enhancing Natural Hazard Preparedness

“…With a successful track record in the training of equipment operators and medical personnel, AR/VR would appear to hold the potential to ameliorate some of the impacts of natural disasters and the burden placed on first responders by better educating communities and providing community members safe immersions into disaster scenarios, allowing direct perception of these environments more effectively than other methods (Hu et al, 2018).…”

Adaptive Construction of the Virtual Debris Flow Disaster Environments Driven by Multilevel Visualization Task

“…These data are continuous surface models consisting of a series of grids. According to the characteristics of these data sets, this paper uses the standard quad-tree spatial partitioning method to organize the data, preprocesses these data into multiple regions and resolutions, and constructs a hierarchy scene pyramid [43,44]. Basic geographic data are divided into three categories: digital orthophoto map (DOM), digital elevation model (DEM) and digital surface model (DSM) data.…”

Optimized Organization and Adaptive Visualization of Complicated Mountain Disaster 3d Scenes for Diverse Terminals

“…Mountain disaster scenes usually contain a large amount of data, include image and terrain data, 3D building models, disaster simulation data, POI data and road models (Hu et al 2018). Therefore, the optimization organization and adaptive scheduling of disaster scene data is the key point to the high efficiency and high quality 3D visualization of complicated disaster scenes for diverse terminals.…”