標題: 可有效描繪半透明度材質之快取技術
An Efficient Caching Technique for Rendering Translucent Materials
作者: 耿世瓴
Keng, Shih Ling
莊榮宏
Jung-Hong Chuang
資訊科學與工程研究所
關鍵字: 快取技術;半透明度材質;真實影像合成;全域照明;表層內散射;caching technique;translucent materials;realistic image synthesis;global illumination;subsurface scattering
公開日期: 2003
摘要: 本論文提出一個可有效描繪半透明度材質的快取技術。此快取技術主要靈感來源為 irradiance caching。我們首先採用irradiance caching的基本架構當作我們的基礎。接著提出分割圓(split-disk) 模型決定cache的分布並且轉換dipole diffusion approximation方程式,推導出gradient of subsurface illuminance,最後利用已存好的cache以及gradient of subsurface illuminance來內插圖像。實驗結果顯示,我們只需要很少量的cache便可內插出整張圖像,整體加速約為5~15倍,且內插所產生的視覺誤差幾乎可以忽略。
This thesis presents an efficient rendering technique for translucent materials using caches. The proposed caching scheme, inspired by the irradiance caching method, is integrated into a hierarchical rendering technique for translucent materials. We propose a split-disk model to determine the cache distribution and derive the subsurface illuminance gradient used for interpolation by reformulating the equation of dipole diffusion approximation as a 3D convolution process. Our experiments show that only a few caches are required to interpolate the entire image, while the visual difference is negligible. The speedup could be achieved up to one order of magnitude.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009117507
http://hdl.handle.net/11536/49480
Appears in Collections:Thesis