A LIGHTING SIMULATION UNDER FOGGY CONDITION BY PARTICLE DISTRIBUTION(International Workshop on Advanced Image Technology 2007)

概要

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This paper proposes a visual lighting simulation under foggy condition in which the ray tracing method with probability is introduced. Since water particles generating fog are sufficiently larger than wavelength of visible light, geometric optics is introduced to the ray tracing, while some scattering theories are applied to case of shorter wavelength. Each ray is supposed to go through a series (sequence) of cubic voxels. Each voxel contains a water particle representing fog. Calculating probability of intersection between the ray and the particles, we determine a voxel where the ray intersects with a particle. Therefore, the proposed method works fast and efficiently by avoiding unnecessary calculation of intersection of rays with all particles in the series of voxels along the rays, respectively.
社団法人電子情報通信学会の論文
2007-01-03