Rendering discrete participating media using geometrical optics approximation

作     者：Jie Guo Bingyang Hu Yanjun Chen Yuanqi Li Yanwen Guo Ling-Qi Yan Jie Guo;Bingyang Hu;Yanjun Chen;Yuanqi Li;Yanwen Guo;Ling-Qi Yan

作者机构：State Key Lab for Novel Software TechnologyNanjing UniversityNanjing 210023China Department of Computer ScienceUC Santa BarbaraUSA 

出 版 物：《Computational Visual Media》 (计算可视媒体（英文版）)

年 卷 期：2022年第8卷第3期

页      面：425-444页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

基　　金：National Natural Science Foundation of China(Grant Nos.61972194 and 62032011) 

主　　题：light scattering geometrical optics approximation(GOA) discrete participating media volume rendering 

摘      要：We consider the scattering of light in participating media composed of sparsely and randomly distributed discrete *** particle size is expected to range from the scale of the wavelength to several orders of magnitude greater,resulting in an appearance with distinct graininess as opposed to the smooth appearance of continuous *** fundamental issue in the physically-based synthesis of such appearance is to determine the necessary optical properties in every local *** these properties vary spatially,we resort to geometrical optics approximation(GOA),a highly efficient alternative to rigorous Lorenz–Mie theory,to quantitatively represent the scattering of a single *** enables us to quickly compute bulk optical properties for any particle size *** then use a practical Monte Carlo rendering solution to solve energy transfer in the discrete participating *** proposed framework is the first to simulate a wide range of discrete participating media with different levels of graininess,converging to the continuous media case as the particle concentration increases.