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带材质的GPU加速体绘制算法

GPU Accelerated Volume Rendering with Material
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摘要 在体绘制过程中,为了给物质表面加入材质(光照和纹理)来提高结果的可读性,提出一种带材质的体绘制算法.通过引入2D球面光照贴图,用纹理映射替代了GPU中复杂的光照模型计算;利用物质表面单位法向量索引球面光照贴图中对应点的颜色信息,从而给物体表面赋予各种材质属性;并结合基于3D纹理的GPU光线投射算法完成绘制.实验结果表明,该算法简单易行,在增强可视化效果的同时使得绘制的效率也得到提升. Object surface with material(lighting and texture) can be used to enhance the perception of volume rendering.In this paper,we introduce a 2D sphere illumination map,which is computed offline and used in the run time to simplify GPU shading computation to texture lookups.Color of the corresponding point in the sphere map is indexed by the normalized normal vector of the object surface,thus assigning material to the surface.This method can be simply applied to GPU-based 3D texture ray-casting algorithm.The results show the implementation permits both visual effect enhancement and efficiency improvement.
出处 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2010年第12期2133-2137,共5页 Journal of Computer-Aided Design & Computer Graphics
关键词 体绘制 GPU 材质 球面光照贴图 volume rendering GPU material sphere illumination map
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参考文献14

  • 1Levoy M.Display of surfaces from volume data[J].IEEE Computer Graphics and Applications.1988,8(5):29-37.
  • 2Cabral B,Cam N,Foran J.Accelerated volume rendering and tomographic reconstruction using texture mapping hardware[C] //Computer Graphics Proceedings,Annual Conference Series,ACM SIGGRAPH.New York:ACM Press.1995:91-98.
  • 3Pfister H,Lorensen B,Bajaj C,et al.The transfer function bake-off[J].IEEE Computer Graphics and Applications.2001,21(3):16-22.
  • 4Kniss J,Kindlmann G,Hansen C.Multidimensional transfer functions for interactive volume rendering[J].IEEE Transactions on Visualization and Computer Graphics.2002,8(3):270-285.
  • 5Cullip T J,Neumann U.Accelerating volume reconstruction with 3D texture hardware[R].Chapel Hill:the University of North Carolina.Department of Computer Science.1993.
  • 6Rezk-Salama C,Engel K,Bauer M,et al.Interactive volume rendering on standard PC graphics hardware using multi-textures and multi-stage rasterization[C] //Proceedings of the ACM SIGGRAPH/Eurographics workshop on Graphics Hardware.New York:ACM Press.2000:109-118.
  • 7Krüeger J,Westermann R.Acceleration techniques for GPU-based volume rendering[C] //Proceedings of the 14th IEEE Visualization.Washington D C:IEEE Computer Society Press.2003:287-292.
  • 8Stegmaier S,Strengert M,Klein T,et al.A simple and flexible volume rendering framework for graphics-hardware-based raycasting[C] //Proceedings of Workshop on Volume Graphics.New York:ACM Press.2005:187-195.
  • 9Dachille F,Kreeger K,Chen Baoquan,et al.High-quality volume rendering using texture mapping hardware[C] //Proceedings of the ACM SIGGRAPH/Eurographics Workshop on Graphics Hardware.New York:ACM Press.1998:69-76.
  • 10Westermann R,Ert1 T.Efficiently using graphics hardware in volume rendering applications[C] //Proceedings of the 25th Annual Conference on Computer Graphics and Interactive Techniques.New York:ACM Press.1998:169-177.

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