The Application and Implementation of Real-Time Three-Dimensional Video Scene in Virtual Target Aiming Training

The traditional virtral target aiming training uses indoor large screen projection more. Recently, the system also uses the virtual reality scene as background. According to the situation, using real-time video frame as the virtual target aiming training background for the authenticity of the virtual target aiming training scene is presented in this paper. This method fully shows the maturity of modern video acquisition technology and the innovation of virtual reality scene. This paper prensents using DirectShow tools for video frame acquisition and taking the advantages of OpenFight API for the model built by military simulation modeling software MultiGen Creator development based on OpenGL development platform and completes the building of virtual target aiming training scene based on real-time three-dimensional video scene and the consistency of virtual target and scene.

It's Turtles all the Way Down: A Comparative Analysis of Visually Induced Motion Sickness

One of the most frustrating aspects of motion sickness is the apparent lack of predictability, particularly from one context (seasickness) to another (cybersickness). It has been postulated that this lack of predictability is indicative of separate but related disorders. Recent evidence has suggested that the problem may not lie in the disorder itself, but in the measures used to predict it. Based on the predictions of Riccio and Stoffregen (1991) and the findings of Smart, Stoffregen, and Bardy (2002), a secondary analysis was performed using parameters of postural motion in order to classify participants who would later become motion sick across three laboratory (four modes of presentation: moving room (Smart, et al, 2002), high fidelity flight simulator (Stoffregen, et al, 2000) large screen projection, and head mounted display (Otten, 2005)) settings. Results suggest that measures of postural instability may serve as a common, minimally invasive, and predictive index of visually induced motion sickness.

Study of a-Si:H/μc-Si:H Heterojunction as Photosensor for Large Screen Projection Display

ABSTRACTLiquid crystal light valve(LCLV) using an a-Si:H/μc-Si:H heterostructure as the photosensor and the nematic liquid crystal as the modulator has been firstly presented for large screen projection display. The a-Si:H photoconductor and μc-Si:H light blocking layer were prepared by a modified glow discharge CVD method. The optoelectric and structure properties of the μc-Si:H films deposited at different deposition conditions have been studied. The a-Si:H film and the continuously deposited pc-Si:H film possibly form an a-Si:H/μc-Si:H heterojunction. The electrical and optoelectric properties of the heterojunction has been studied.LCLV using a-Si:H/μc-Si:H heterostructure has shown that the most aspects of the device performance can be improved.