| 半透明物体漫散射效果的实时绘制与材质编辑 |
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| 引用本文： | 王锐,Rui Wang,David Luebke,华炜,Peng Qunsheng,鲍虎军.半透明物体漫散射效果的实时绘制与材质编辑[J].计算机辅助设计与图形学学报,2008,20(8). |
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| 作者姓名： | 王锐 Rui Wang David Luebke 华炜 Peng Qunsheng 鲍虎军 |
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| 作者单位： | 1. 浙江大学CAD & CG国家重点实验室,杭州,310058
2. Department of Computer Science,University of Massachusetts,Amherst,MA 01003 USA |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 半透明物体透明效果的真实感绘制是近年来研究的热点,提出一种针对半透明物体漫散射效果的实时真实感绘制与材质动态编辑方法--基于双向表面散射反射率函数(BSSRDF)的Dipole近似.通过主元分析将Dipole近似中的漫散射材质甬数分解为与形状相关甬数和与半透明材质相关函数的乘积形式;利用该分解表示,在预辐射传输的实时真实感绘制框架下,通过对散射传输的预计算来实现在多种光源环境下对半透明物体材质的实时编辑.此外,还提出一种对预计算辐射传输数据在空域上进行二次小波压缩的方法,利用表面点在空间分布位置的相关性,在保证绘制质量的前提下,大大压缩了数据,提升了绘制效率.实验结果表明,文中方法可以生成具有高度真实感的半透明效果并保证实时的绘制速度.
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| 关 键 词： | 半透明材质编辑 双向表面散射反射率函数 主元分析 Dipole近似 |
Real-Time Editing and Rendering of Translucent Materials with Homogeneous Diffuse BSSRDFs |
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| Wang Rui,Ewen Cheslack-Postava,Rui Wang,David Luebke,Hua Wei,Peng Qunsheng,Bao Hujun.Real-Time Editing and Rendering of Translucent Materials with Homogeneous Diffuse BSSRDFs[J].Journal of Computer-Aided Design & Computer Graphics,2008,20(8). |
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| Authors: | Wang Rui Ewen Cheslack-Postava Rui Wang David Luebke Hua Wei Peng Qunsheng Bao Hujun |
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| Affiliation: | Wang Rui1)Ewen Cheslack-Postava2)Rui Wang3)David Luebke4)Hua Wei1)Peng Qunsheng1)Bao Hujun1)1)(State Key Laboratory of CAD & CG,Zhejiang University,Hangzhou 310058)2)(Department of Computer Science,Stanford University,Palo Alto,CA 94305 USA)3)(Department of Computer Science,University of Massachusetts,Amherst,MA 01003 USA)4)(NVIDIA CORPORATE,Santa Clara,CA 95050 USA) |
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| Abstract: | A method for real-time editing and rendering of translucent materials with homogeneous diffuse bidirectional surface scattering reflectance distribution function(BSSRDF)is proposed.Based on the Dipole approximation of BSSRDF,we derive a new factoring form of the diffuse scattering function and project the geometry related factor onto a limited set of basis functions by employing principal component analysis,these geometry related parts can be pre-computed.As a huge amount of sample data for evaluating the d... |
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| Keywords: | translucent material editing bidirectional surface scattering reflectance distribution function principle component analysis Dipole approximation |
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