HMD、球幕和平面投影的环境模拟对焦虑缓解的效果对比

以国内某大学在校研究生为对象,利用状态-特质焦虑量表(STAI),定量比较头戴式虚拟显示器(Head Mounted Display,HMD)、球幕、平面投影三种媒体环境中的环境模拟对焦虑的缓解效果。实验以Oculus头戴式虚拟显示器,球幕,投影仪为主要实验设备。实验对象在焦虑情绪诱发实验后,分三组分别体验三种媒体中的自然环境模拟,对比前后状态焦虑情况分析焦虑缓解效果。研究结果表明:(1)三种媒体中的环境模拟对焦虑缓解均有效,且效果为Oculus>平面投影>球幕。(2)球幕中的环境模拟对焦虑的缓解效果个体差异最大,平面投影次之,Oculus个体差异最小。

多投影显示墙的几何校正

随着大屏幕拼接技术的日益发展,多投影显示墙的几何校正成为备受关注的研究课题.在分析多投影显示墙几何校正中关键技术的基础上,提出了一种健壮的校正图案,并通过处理数码相机拍摄的该图案信息,提出一种高精度的平面幕几何校正算法;然后根据双目视觉的立体显示原理,将上述平面幕校正方案推广到立体平面幕系统,给出一种新颖的立体平面幕几何校正方法.

Reflecting and transmitting effect of a planar unidirectionally conducting screen

The reflecting and transmitting effects of a planar unidirectionally conducting screen are analyzed based on the accurate closed-form expression for electric field of an arbitrarily oriented electric dipole.For a dipole oriented along the wire elements of the screen,the screen acts as a perfectly electrically conducting plane.For a dipole perpendicular to the wire elements,the fields reflected by the screen can be interpreted as the contribution of an image dipole and image transmission-line current source,while the transmitted field is arisen from image transmission-line source.The expressions of related surface waves are derived and can be compared with previous results.