Ray tracing is a classic method in synthesizing photorealistic image, It can accurately simulate the lighting effect of the whole scene.
而光线追踪是传统真实感图象合成的经典方法，能够精确模拟出景物的光照效果。
By using the ray tracing method, the scattering from all cells of scatters under a certain radar resolution is mapped into the image pixels.
用射线跟踪法，按射程计算将散射投影在平面图像对应单元的像素点上，得到自然地表的雷达图像模拟。
Based on Image Theory and tube-tree method, an applicable ray tracing method based on virtual source tree was presented in this paper.
本文在参照了镜像法、射线管法等射线跟踪思想的基础上，提出了一种有效的基于虚拟源树的射线跟踪模型。
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