Using Photon Maps and Irradiance Cache in Photorealistic Image Synthesis

Photorealistic image synthesis deals with simulation of the light energy transport in an artificial scene in order to generate realistic looking snapshot of the scene from a given position. From a physical point of view we need to compute the value of radiance L reflected to the camera at every visible point of the scene. This task is very difficult and time consuming, because of recursion in the computation process. In our work, we chose a combination of two algorithms for realistic image synthesis: Photon Maps and Irradiance Cache. We further extended the algorithms in some aspects not addressed before. e incoming directions. It is a Fredholm's integral equation of second kind. It can be solved by stochastic Monte Carlo methods (ray tracing) or finite elements methods (radiosity). The algorithms we used are the modification of stochastic Monte Carlo methods. ∫ Ω · · · + = ω θ d f L L L r i e o cos