Chen Nanguang
Division of Bioengineering and the Department of Electrical and Computer Engineering, National University of Singapore, Singapore.
Appl Opt. 2007 Apr 1;46(10):1597-603. doi: 10.1364/ao.46.001597.
The controlled Monte Carlo method is generalized to model photon migration in turbid media of arbitrary geometries. Its implementation for the reflection geometry is exemplified in this paper. The most probable diffuse direction of light is used as the local attractive vector that serves as the basis of biased sampling of scattering angles. Consequently, path-length resolved photon trajectories can be generated with a significantly improved efficiency. We report a more than 29 times reduction in simulation time for early arriving photons in a typical configuration.
受控蒙特卡罗方法被推广用于对任意几何形状的混浊介质中的光子迁移进行建模。本文以反射几何形状的实现为例进行说明。光的最可能漫射方向用作局部吸引矢量，作为散射角有偏采样的基础。因此，可以以显著提高的效率生成路径长度分辨的光子轨迹。我们报告了在典型配置中，早期到达光子的模拟时间减少了29倍以上。
