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研究生:蔡宗志
研究生(外文):Tsung-Chih Tsai
論文名稱:建構在以階層式空間分割手法上的平行計算式光線追蹤程式之實作
論文名稱(外文):The Implementation of a Parallel Computing Ray Tracer Based on a Hierarchical Spatial Division Method
指導教授:陳履恆
指導教授(外文):Lieu-Hen Chen
學位類別:碩士
校院名稱:國立暨南國際大學
系所名稱:資訊工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:63
中文關鍵詞:電腦圖學3D視覺化系統整體照明模型java RMI鑽石寶石寶石工業
外文關鍵詞:Computer Graphics3D VisualizationGlobal Illumination methodsjava RMIDiamondsGemstonesJewelry Industry
相關次數:
  • 被引用被引用:0
  • 點閱點閱:243
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  • 下載下載:34
  • 收藏至我的研究室書目清單書目收藏:0
在本研究中,我們以 Computer Graphics的手法,模擬光線照射寶石晶體的若干特殊現象,以生成寶石晶體經切割後,在不同觀察角度與照明條件下的影像。我們將晶體特有的結晶構造,與CG之volumetric 3D models 結合在一起,並且整合傳統的2 pass ray tracing手法,以模擬切磨後寶石的光學特性,生成正確、逼真的寶石影像。
然而,上述處理過程,要求非常龐大的計算能力與記憶體空間資源,甚至造成在個人電腦的工作平台上開發系統時的困難與瓶頸。為了提高系統效能,解決上述對資源龐大需求的問題,以及追求更高解析度、高畫質的影像,我們將2 - pass ray tracing的架構再加以改變,建構在以階層式空間分割的基礎上,來平行分散處理龐大的計算與記憶體空間需求。
以本研究為基礎所開發的寶石切磨CG影像模擬系統,將可提供全球寶石業一個極其重要的決策工具。

In our paper, we propose an enhanced 2-pass Ray Tracing method based on the 3D voxel matrices architecture and a hierarchical spatial division method to model and synthesize the images of gemstones with many different optical characteristics under different illumination conditions. The optical characteristics include the brilliance, luster, fire, Birefringence, asterism, and so on. We use the 3D voxel matrices architecture to store the tracks of light in the scene regardless of the attributes of surfaces instead of 2D illumination map that is pre-calculated texture for diffuse surfaces only. Besides, Implementing Ray Tracing needs lots of computing resources and memorial capacity. Thus, the hierarchical spatial division method is created to offer us a parallel and distributed environment. It helps us improve the system performance and the image quality.
The prototype of our 3D visualization system of gemstones, 3D Gemstone Viewer, which is useful for jewelry industry, is also introduced in this paper.

Content
Chapter 1 Introduction…………………………………………….1
1.1 Motivation and Purpose………...………………………………1
1.2 Related Work……………………………………………………3
Chapter 2 Related Background…………………………………. 5
2.1 The Optical Characteristics Of Gemstones……………………. 5
2.2 The Conventional Rendering Method Of CG…………………15
Chapter 3 Algorithm and Structure………………………… 21
3.1 Dispersion….…………………………………………………..21
3.2 Birefringence…………………………………………………..24
3.3 Asterism………………………………………………………..39
3.4 Hierarchical Spatial Division Method…………………………41
3.5 Hierarchical 3D Voxel Matrixes and Illumination Look Up Table…………………………………………………………...50
Chapter 4 Implementation………………………………………52
4.1 RMI……………………………………………………………52
4.2 Implementation………………………………………………..53
Chapter 5 Conclusion………………………………….……57
5.1 Result………………………………………………………….57
5.2 conclusion……………………………………………………..60
參考文獻……………………………………………………………..61

參考文獻
1. Alan Watt & Mark Watt, “Advanced Animation and Rendering Techniques”,Addison-Wesley
2. http://www.geology.wisc.edu/~jill
3. Christoph M. Hoffmann, “Geometric and Solid Modeling: An Introduction”, Morgan Kaufmann
4. Gabrel Taubin, William P. Horn, Francis Lazarus, and Jarek Rossignac, “Geometry coding and VRML”, Proceedings of the IEEE,Vol. 86(6),June 1998,pp1228~1243
5. T.Watanabe, K. Kitagawa, Y. Yamanoue and H. Chiyokura, “Toolkit for Making 3D Cyber World”, IEEE Workshop on Networked Realities, 1995.
6. T. Nishita,E. Nakamae, “Method of Displaying Optical Effects within Water using Accumulation-Buffer”, Proc. of SIGGRAPH’94, 1994-7,pp. 373-380.
7. Nakamae, K. Tadamura, H. Yamashita, K. Kaneda, T. Nishita, “Lighting Model on Gas and Liquis”, CG International’93, 1993-6, pp. 89-103.
8. C. B. Harrell and F. Fouladi, “Graphics Rendering Architecture for a High Performance Desktop Workstation”, Computer Graphics, (SIGGRAPH’93 Proceedings), pp. 93-100, 1993.
9. K. Kaneda, G. Yuan, E. Nakamae, T. Nishita, “Photorealistic Visual Simulation of Water Surfaces Taking into account Radiative Transfer”, Proc. of CG &CAD, 1991-9, pp. 25-30.
10. T. Nishita, T. Sederberg, M. Kakimoto, “Ray Tracing Trimmed Rational Surface Patches”, Computer Graphics, Vol.24, No.4, 1990-8, pp.337-345.
11. Wallace J. R., Cohen M. F., and Greenberg D. P., “A two-pass solution to the rendering equation: a synthesis of ray tracing and radiosity method”, Computer Graphics’87, 21(4), 1987, pp. 311~320.
12. F. Pedrotti and L. Pedrotti, “Introductions to Optics”, Peentice-Hill, Taipei, 1987.
13. Joy I. K., and Bhetanabhotla M. N., “Ray tracing parametric surfaces utilizing numeric techniques and ray coherence”, Computer Graphics’86, 20(4), 1986, pp. 279~286.
14. Immel D. S., Cohen M. F., and Greenberg D. P., “A radiosity method for non-diffuse environments”, Computer Graphics’86, 20(4), 1986, pp. 133~142.
15. J. T. Kajiya, “Anistropic Reflection Models”, Computer Graphics, Vol. 19, no.3, pp. 15~21, 1985.
16. Yariv and P. Yeh, “Optical Waves in Crystals”, Wiley, Taipei, 1984.
17. Kajiya J. T., “New techniques for ray tracing procedurally defined objects”, Computer Graphics’83, 17(3), 1983, pp.91~102.
18. M. Robart, M. Paulin, R. Caubet, “A Realistic Material Model for Reflectance Simulation”, page 205~210, 1093-9547/98 IEEE.
19. T. Dobashi, N. Nagata, Y. Manabe, S. Inokuchi, “Implementation of a Pearl Visual Simulator”, 1998 2nd International Conference on Knowledge-Based Intelligent Electronic Systems, page 274~281, 0-7803-4316-6/98 IEEE.
20. N. Nagata, T. Dobashi, Y. Manabe, T. Usami, S. Inokuchi, “Modeling and Visualization for a Pearl-Quality Evaluation Simulator”, IEEE Transactions on Visualization and Computer Graphics, 1997, Vol. 3, No. 4, page 307~315, 1077-2626/97 IEEE.
21. Nelson Max, “Optical Modls for Direct Volume Rendering”, IEEE Transactions on Visualization and Computer Graphics, 1995, Vol. 1, No. 2, page 99~108, 1077-2626/95 IEEE.
22. 電磁學,王怡鈞譯,超級科技圖書公司
23. 張志純, “鑽石世界”,徐氏基金會
24. Lieu-Hen Chen, Santi Saeyor, Hiroshi Dohi, Mitsuru Ishizuka, “A system of 3D hair-style synthesis based on the wisp model”, 15: 159~170, The Visual Computer 1999, Springer-Verlag
25. N. Magnenat-Thalmann and D. Thalmann, “ Complex Models for Animating Synthetic Actors ”, IEEE Computer Graphics & Applications, pp.32~44, Sep. 1991.
26. N. Magnenat-Thalmann and D. Thalmann, “ Synthetic Actors in Computer-Generated Films ”, Models and Techniques in Computer Animation, Springer-Verlag, 1990.
27. G. S. P. Miller, “ From Wire Frames to Furry Animals ”, Proc. Graphics Interface’88, pp.138~146, 1988.
28. Y. Watanabe and Y. Suenaga, “ Drawing Human Hair using Wisp Model ”, Proc. Computer Graphics International, pp.691~700, 1989.
29. A. M. LeBlanc, R. Turner and D. Thalmann, “ Rendering Hair using Pixel Blending and Shadow Buffers ”, Jour. of Visualization and Computer Animation, v2, pp.92~97, 1991.
30. Y. Watanabe and Y. Suenaga, “A Trigonal Prism-Based Method for Hair Image Generation”, IEEE Computer Graphics & Applications, pp.47~53, Jan. 1992.
31. K. Anjyo, Y. Usami and T. Kurihara, “ A Simple Method for Extracting the Natural Beauty of Hair ”, Computer Graphics, vol.26, no.2, pp.111~120, July 1992.
32. J. T. Kajiya and T.L.Kay, “ Rendering Fur with Three Dimentional Textures ”, Computer Graphics, vol.23, no.3, pp.271~280, 1989.
33. T. Yamana and Y. Suenaga, “ A Method of Hair Representation using Anisotropic Reflection ”, IECEJ Tech. Report PRU87-3, pp.15~20, 1987 ( in Japanese ).
34. K. Perlin and E. Hoffert, “ Hypertexture ”, Computer Graphics, vol.23, no.3, pp.253~262, 1989.
35. R. E. Rosenblum, W. E. Carlson and E. tripp III, “ Simulating the Structure and Dynamics of Human Hair: Modeling, Rendering and Animation ”, Jour. of Visualization and Computer Animation, vol.2, pp.141~148, 1991.

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