节点文献
三维动态显示技术研究
Research on Three-dimensional Dynamic Display Technology
【作者】 崔大为；
【作者基本信息】 国防科学技术大学 ， 计算机科学与技术， 2010， 硕士
【摘要】 随着多媒体技术的不断发展,简单的平面二维显示已经不能满足人们的需求,人们希望能够更直接地反映现实世界,而二维图像只能使人们了解到世界的某个空间侧面信息,从而限制了人们对世界的全面认识,因此三维动态显示将成为未来显示领域的研究热点。近几年来,由于计算机性能和处理能力的大幅提高,三维动态显示技术已取得了突破性的发展。三维动态显示是经典的二维平面视频的扩展,相比于二维视频,三维动态显示可以给用户提供全方位沉浸式的感受。三维动态显示技术可以广泛应用于数字电视、远程教育、远程工业控制、三维视频会议系统、虚拟现实系统等诸多方面。真三维显示是一种无需借助其它器具就能够实现360度视角观察、观看显示出的三维物体与观看真实物体完全一样的三维显示技术。显示出的视景具有真实三维性,能提供几乎所有的视觉深度暗示,视点不受限制,完全符合人类对真实三维物理世界的观看方式。本文首先对真三维显示系统进行分析,在此基础之上,对三维动态显示技术中三个关键技术进行了深入研究。首先,对面向真三维系统的人机交互技术进行了研究,提出了适用于真三维静态显示的三维光笔交互系统,并用理论证明了该方法的可行性。其次,对三维视频压缩技术进行了研究,结合目前三维视频压缩技术发展方向及真三维系统的特点,提出了一种基于全景采集的时空同步三维视频编码,通过实验对时间和空间压缩不同顺序的三种压缩模式进行了比较,从而得出结论。最后,为了保证真三维系统中多路视频输入输出的同步性,对多路视频帧同步软件进行了设计,并与帧同步硬件设备联合测试,验证了该软件的帧同步性能。
【Abstract】 With the continuous development of multimedia technology, simply two-dimensional display already cannot satisfy people’s needs, people want to know the real world more directly. But two-dimensional image can only show people some sides of the world, which make people can’t know the whole world comprehensively. Therefore three-dimensional dynamic display will become a hotspot in the field of display in the future.In recent years, due to great improvement of computer’s performance and processing capacity, three-dimensional dynamic display has made great breakthrough. Three-dimensional dynamic display is a expansion of the classical two-dimensional display, it can provide users a omni-directional tele-immersive feeling compared to two-dimensional display. Nowadays, three-dimensional dynamic display can be widely used in digital television, remote education, remote industrial control, 3d video conference system, virtual reality system, and other aspects.True three-dimensional display can show users the world itself and provide users with 360 degree angle of view without any other instruments. It can also provide most of the visual depth hint、unrestricted viewpoint, and accord to the way in which people observing the real three-dimensional world. Firstly in this paper, the system of true three-dimensional display was analyzed. Based on the analyses, three key technologies of three-dimensional dynamic display were studied.First of all, the human-computer interaction techniques facing to true three-dimensional system were studied. Then a three-dimensional light-pen interactive system applicable to real three-dimensional static display was put forward, and the feasibility of this method was proved by theory. Secondly, three-dimensional video compression technology was studied. After that, a space-time synchronous three-dimensional video coding based on panoramic view collection was presented. Then the three compression models based on different time-space orders were compared by experiment, thus the conclusion was drew. Finally, in order to guarantee the synchronicity of multiple video input and output in true three-dimensional system, the multiple video frame synchronization software was designed. And the performance of it was verified by test with frame synchronization hardware device.