基于物理的浑浊水体的光照模拟

Realistic Simulation of Lighting Effects of Turbid Water

水体的真实感光照模拟是计算机图形学中的重要研究内容.现有的研究偏重于清澈水体的光照模拟,无法直接用于浑浊水体,为此提出一种基于物理的浑浊水体的真实感光照模拟方法.首先基于物质对水体光学特性的影响对浑浊水体进行建模,并分别建立每一类物质的吸收和散射模型;然后根据光线在浑浊水体中的传播及其与不同物质颗粒的交互作用计算光能的衰减变化,并将其转换为RGB颜色系统进行真实感绘制.借助GPU强大的并行处理能力,该方法可以实现对不同浑浊水体的光照效果的实时绘制.

Realistic simulation of the lighting effects of water body is an important research in computer graphics.Previous studies emphasized on simulation of the lighting effects of the clear water,which could not be used directly for turbid water.This paper proposed a physically based method for realistic simulation of the lighting effects of turbid water.First,the water body is modeled by considering the optical properties of different materials in turbid water,and established their absorption and scattering model,respectively.Then,according to the spread of light in the turbid water and its interactions with the particles of different materials,the attenuation of light changes were calculated,and converted it to RGB color system for photorealistic rendering.With a powerful GPU parallel processing capability,the method can achieve real-time rendering for different types of turbid water.Various experiment results validate this method.