三维虚拟摄像机的建模及其漫游控制方法  

Virtual 3D camera's modeling and roaming control

作　　者：闫志远[1] 吴冬梅[1] 鲍义东[1] 杜志江[1] 

机构地区：[1]哈尔滨工业大学机器人技术与系统国家重点实验室,哈尔滨150080

出　　处：《高技术通讯》2013年第2期181-188,共8页Chinese High Technology Letters

基　　金：863计划(2009AA044001)资助项目

摘　　要：利用矢量描述方法表达了虚拟现实(VR)中的虚拟单目摄像机模型,在此基础上,基于双目视差形成三维视觉的原理确定虚拟现实环境中双目三维摄像的控制参数及其约束关系,进而提出了包含两个单目虚拟摄像机的三维虚拟摄像机整体模型。针对该模型提出了一种基于机器人运动学方法的双目虚拟摄像机漫游控制方法,解决了虚拟现实三维观察参数难以实时改变而导致的视角局限和三维失真等问题。实验表明通过该三维虚拟摄像机可获取高质量三维效果,提出的漫游控制方法通过模型的自动运算和参数补偿可实时主动地获取任意方向的三维景深。这种由被动式虚拟三维向交互性虚拟三维的跨越对改进虚拟现实的沉浸感具有重要意义。A monocular virtual camera model was described using the vector description method. Based on this, the pa- rameters of a 3D binocular virtual camera and their Constraining relations were determined according to the binocu- lar vision theorem, and then a 3D virtual camera model which contains two monocular virtual cameras was pro- posed. According to the 3D virtual camera model ,a roaming control method for binocular virtual cameras was pro- posed based on robot kinematics to solve problems of viewing angle limitations and 3 D imaging distortion caused by the fact that 3D observation parameters are difficult to change in common virtual reality. The experimental results show that the 3 D virtual camera model and the roaming control model can be effectively used to observe virtual real- ity environments and make the parameters adjusted in real time based upon observation demand, which means that the shift from passive virtual 3D to interactive virtual 3D is of great significance to the improvement of 3D observa- tion in virtual reality.

关 键 词：虚拟现实(VR) 双目视差 三维视觉 三维虚拟摄像机 漫游控制 

分 类 号：TN948.41[电子电信—信号与信息处理]