航天器飞行场景的真实感生成  

Realistic Image Synthesis of Flying Scenes of Spacecraft

作　　者：刘世光[1] 王章野[1] 王长波[1] 彭群生[1] 

机构地区：[1]浙江大学CAD&CG国家重点实验室

出　　处：《计算机学报》2005年第1期68-74,共7页Chinese Journal of Computers

基　　金：国家"九七三"重点基础研究发展规划项目基金 (2 0 0 2CB3 12 10 1);国家自然科学基金项目 (60 2 73 0 5 3 );国家"八六三"高技术研究发展计划项目基金 (2 0 0 2AA13 5 0 5 0 );国家预研基金 (5 14 760 70 10 1JW0 40 9)资助 .

摘　　要：太空场景及航天器动态飞行场景的真实感生成是计算机图形学研究者面临的新课题 .该文提出了一种航天器飞行场景生成的新方法 .该方法首先基于天文学的依巴谷星表 ,采用了基于图像的建模绘制及层次细节简化等技术加速绘制 ,准确地构造并绘制出不同时刻、不同观察点的地球外星空背景随时间的动态变化 ;再根据天体物理学原理确定出航天器的飞行轨迹 ,由此合成产生了航天器的太空飞行场景 .然后根据量子光学及等离子体辐射原理对航天器再入大气层的过程进行了建模 ,确定出其再入轨迹、航天器尾焰和尾迹的颜色和几何形态 .最后逼真地绘制出航天器返回时穿越大气不同阶段所产生的特异尾迹形状和发光效果 .Photo-realistic image synthesis of dynamic flying scene of spacecraft and outer space scene is really a new challenging task for the researchers of computer graphics. In this paper a new method to realistically render the flying scenes of spacecraft is proposed. In the new method, based on Hipparcos Catalogue in Astronomy, authors first construct and render the dynamic scene of outer space sky with stars accurately at different viewpoints and at different time by adapting the accelerated rendering techniques such as image based modeling and rendering, level of details. According to the principle of astrophysics, the flying track of the spacecraft is determined. The flying scene of spacecraft with outer space background is thus generated. Then, based on the principle of quantity optics and radiance of plasma, authors model the reentry process of the spacecraft and determine the reentry trace, the colors and shapes of the turbulent trail and wake flow of the spacecraft. Finally, realistic images of the spacecraft with fantastic wake shape and color during its reentry through the atmosphere at different phases are drawn.

关 键 词：真实感图形 航天器 飞行场景 量子光学 等离子体辐射 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]