交会对接航天员训练电视图像实时高动态范围渲染  

Real-Time HDR-Rendering for Simulated TV-Graphics of Rendezvous and Docking in Astronaut Training

作　　者：赵再骞 晁建刚[1] 王金坤[1] 张炎[1] 陈学文[1] 

机构地区：[1]中国航天员科研训练中心人因工程重点实验室,北京100094

出　　处：《计算机辅助设计与图形学学报》2015年第2期279-286,共8页Journal of Computer-Aided Design & Computer Graphics

基　　金：中国航天医学工程预先研究项目(2013SY54A1303)

摘　　要：应用基于人眼视觉系统的高动态范围实时渲染技术处理交会对接仿真场景,可以为航天员手控交会对接训练提供高逼真度的电视图像.文中结合交会对接电视图像的特点,分析了交会对接航天员训练电视图像高动态范围实时渲染的关键技术;根据两航天器相对距离,将交会对接过程分为远、中和近3个距离段,采用S-curve算法、自适应对数算法和Reinhard算法分别对每个距离段进行调和映射处理;改进了自适应对数算法和Reinhard算法,并基于GPU处理技术实现仿真电视图像的实时显示.实验结果表明,采用基于距离变化调整调和映射算法的方法处理交会对接仿真电视图像可以高逼真地模拟实录视频场景,为航天员手控交会对接训练提供了视景支持.Real-time human visual system （HVS）-based high dynamic range （HDR） rendering technology provideshigh fidelity, and therefore can be used in the simulated TV-graphics for the astronaut rendezvous anddocking （RVD） training. In this paper, first, according to the characteristics of the real video recorded from outerspace in RVD mission, we analyzed key HDR rendering techniques used in the simulated RVD scene forreal-time astronaut’s training. Then, based on the distance between two spacecraft, we employed three tone mappingoperators （TMO）, the S-curve algorithm, the adaptive logarithmic algorithm and the Reinhard algorithm toreproduce the tone of the RVD scene at the far distance, the middle distance and the near distance respectively. Toensure the real-time computation, we improved the adaptive logarithmic algorithm and the Reinhard algorithm,and accelerated them by GPUs. By comparing the simulated RVD scene with the real video recorded from outerspace in RVD mission, our distance-based method has a high fidelity, and supports the astronaut RVD training.

关 键 词：人眼视觉系统 高动态范围渲染 虚拟场景 GPU处理 电视图像 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]