Virtual reality (VR) is a scientific method and technology created during the exploration of the nature by human beings to understand, simulate, and better adapt and use the nature. Based on the analysis on the whole process of VR, this paper presents different categories of VR problems and a type of theoretical expression, and abstracts three kinds of scientific and technical problems in VR field. On the basis of foresaid content, this paper also studies current major research objectives, research results and development trend of VR in the aspects of VR modeling method, VR representation technology, human-machine interaction and devices, VR development suites and supporting infrastructure, as well as VR applications. Finally, several theoretical and technical problems that need to be further studied and solved are addressed.

A survey on virtual reality

FSVDS, a visual demonstration system of flight simulation is designed and implemented based on OSG. FSVDS is highly configurable using a set of configuration files. FSVDS supports multiple display modes such as real time visualization of numerical simulation or simulation with semi-real objects, and playback content of path file and viewpoint file which can be recoded and edited by user. To support controls on progress of flight visual simulation such as play, pause, rollback and faster or slower simulation speed, FSM theory is employed to model the process of visual simulation. Based on OSG: Producer library, FSVDS implement a multi-viewport user interface with the ability of view ports shifting and active view port determination. FSVDS also provide physically based sky dome model and cloud system, as well as trail, trail fire and smoke based on OSG particle system. These make it very suitable for realistic flight simulation.

Visual simulation system for flight simulation based on OSG

The Research uses a virtual tour system for the Nanxi River ancient villege as a case to introduce the design, key technology and developing procedure. The virtual tour system which was created by MultiGen Creator and OSG. Meanwhile, this study introduced the practice in complex modeling, the hierarchical structure of scenes database, the model's simplification and optimization, scene integration, realistic visualization, real-time rendering and architecture implementing. We also introduce the technology of collision detection in the virtual tour system. Using the method provided in this paper, a high efficiency application can be provided besides a better display quality. It can meet the requirement of real-time scene walkthrough.

http://ieeexplore.ieee.org/iel5/6330649/6339626/06339655.pdf

The design and implementation of virtual tour system based on OSG for the Nanxi River ancient villege

It is a new aspect of engineering science that uses augmented reality and collaboration technology to aid the design and maintenance of large equipments. To meet the requirement of the design and manufacture of commercial aircraft in China, CAR-CA (Collaborative Augmented Reality for Commercial Aircraft Design and Maintenance) is developed now to aid the cockpit design and training of components disassembly and assembly. This paper introduces the engineering and technology progress of CAR-CA, including the system architecture, system components, technology researches and future work.

The augmented reality research progress in collaboration environment of CAR-CA

This paper describes a novel method of real-time virtual view generation for augmented virtuality system. The aim is to rectify the displacement between virtual eye position and video cameras which are attached on the head mounted display. It consists of three steps: Firstly, stereo calibration was used to generate cameras' internal and external parameters, and then image planes were rectified to canonical configuration state that made them alignment or corresponding points on the same scan lines. At last the virtual view images between two cameras are generated using view morphing which is a shape-preserving transition method from a source to a destination view. We can adopt this method to choose locations of two virtual cameras yielding an in-between stereoscopic camera views without reconstructing the 3D model of the object. The view of the object corresponding to a virtual camera that is located between two real cameras with same position of eyes. So we can control the feeling of depth and provide customized viewpoint to the user. It can be used in a variety of augmented virtuality applications to integrate live video objects into virtual environments. Experimental results verify the validity of the proposed approach, and we also show interlaced stereo composition results using a pair of synthesized views from input views acquired by stereo cameras.

Real time Virtual View Generation For Augmented Virtuality System

BH_GRAPH: A Real Time 3D Graphics Platform

Review of augmented virtuality technology in virtual reality

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BH_GRAPH: A Real Time 3D Graphics Platform

Review of augmented virtuality technology in virtual reality