航天训练模拟视景的光照仿真方法研究

针对航天员太空观察感知的视景仿真，提出了一种大规模场景下航天器的光照仿真实现方法。通过对航天器的真实光照环境进行建模分析，在此基础上实现了太空场景的光照仿真，并结合太空光照环境特点采用色调映射算法进行了光照亮度调节。光照一致性分析结果表明，航天训练模拟器的视景仿真实现在满足实时性指标的前提下，有效地提高了太空场景仿真的逼真度，所采用的亮度调节方法也切实可行。这种光照仿真方法不仅适用于各种空间活动的视景仿真，对于大场景中的天文景观的仿真也同样可以达到较好效果。

Study on the Illumination Simulation Method for Visual Simulation of the Space Flight Training Simulator

Aiming at realistic astronaut visual simulation in outer space, an illumination simulation method for spacecraft in large-scale scene is presented. According to the radiation theory, a model of lighting environment for a spacecraft is made, and the scene is rendered based on this model. And then, the luminance of the scene is optimized according to characteristics of lighting environment. By comparing the simulation scene with the photo taken from outer space, the consistency of illumination is validated. The result makes it clear that this simulation method not only renders the scene realistic but also enhances the brightness of the scene remarkably, and could adapt to the illumination simulation for space scene and celestial phenomena.