一种基于低维线性子空间的球面谐波光照算法  

Spherical harmonic illumination algorithm based on linear subspaces

作　　者：顾耀林[1] 朱丽华[1] 王华[1] 

机构地区：[1]江南大学信息工程学院,江苏无锡214122

出　　处：《计算机应用》2007年第7期1626-1628,1633,共4页journal of Computer Applications

摘　　要：对虚拟图像场景绘制算法进行研究,提出了一种基于低维线性子空间的球面谐波光照表示算法。从物体模型得到子空间,并抽取其中的低维线性空间,利用球面谐波函数将朗伯反射作为一个卷积处理,来近似表示朗伯反射,同时添加了漫反射阴影交互转移。实验结果表明该算法逼近程度好,绘制质量高,具有一定的实用价值。The algorithm of drawing the virtual image scene was analyzed, and a spherical harmonic illumination algorithm based on linear subspaces was propesed. From the object model to get the subspaces, the low-dimensional linear subspaces were extracted and the spherical harmonics representing Lambertian reflection was used as a convolution, considering the diffuse interreflected transfer simultaneously. Experimental results demonstrate that the algorithm approaches accurately with high quality.

关 键 词：球面谐波函数 双向反射分布函数 表面法向量 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]