臺灣博碩士論文加值系統

在圖學的領域中，照明設計（lighting design）的目的是為了提供光源讓目標可視，並讓觀賞者更易於欣賞合成出的影像。然而，現存大部分的照明設計自動化皆是針對靜態模型的設計方法，鮮少針對動態模型，為此，我們提出一種針對動作資料（motion data）的照明設計自動化方法。

我們將動作資料之照明分為場景的「整體照明」和角色的「區域照明」兩部分。整體照明提供讓目標可視之基本光源，我們視動作資料於舞台上表演，以舞台照明設計之概念建構整體照明，根據動作資料的活動區域，加上採取「視點最大資訊量(viewpoint entropy)」決定舞台方向的觀念，可決定整體照明光源之相關參數；而區域照明之目的在於突顯角色，基於實務常使用之三點打光（three-point lighting）原則，觀察不同型態光源（主光、補光與背光）對角色所造成不同的影響，區域照明配置問題可轉換成數個不同的最佳化問題。配合動作資料根（root）關節軌跡所在的區域，可挑選出數張關鍵影格，對各關鍵影格完成區域照明後，配合適當的照明參數內插，便可達到動作資料之照明設計。文末將展示數個根據此法所產生合成影像的效果。

In computer graphics, lighting designs attempt to achieve desired visual goals and assist viewers to appreciate the synthesized images better. As most existing automatic lighting designs are mainly for static targets, in this paper we present a novel automatic lighting method for motion data. We divide our lighting design into “global lighting” for scenes and “local lighting” for characters. For global lighting, we propose a viewpoint entropy algorithm to determine its lighting parameters according to the acting area of the motion data. Then we show that the best placement of each local light could be obtained by solving the corresponding optimization problem. Note that key frames can be identified by observations of root’s trajectory of motion data. Finally, by appropriate interpolations of lighting parameters of each key frame, the goal of the lighting design for motion data could be achieved. Several examples are given to demonstrate the effectiveness of the proposed method.

英文摘要（ABSTRACT） I
中文摘要 II
致謝詞（ACKNOWLEDGEMENT） III
目錄（CONTENTS） IV
圖表目錄（FIGURES） VI
第一章 簡介（INTRODUCTION） 1
第二章 相關研究（RELATED WORK） 3
第三章 虛擬舞台（VIRTUAL STAGE） 5
3.1 舞台照明之計算模式 5
3. 1. 1 決定活動區域 5
3. 1. 2 決定舞台面向 5
3. 2 舞台照明之空間配置 7
3. 2. 1 舞台照明之燈光位置 8
3. 2. 2 場景規劃與動作分割 10
第四章 靜態姿勢之照明配置（LIGHTING FOR STATIC POSTURES） 13
4. 1 光源配置 14
4. 1. 1 主光 14
4. 1. 2 補光 16
4. 1. 3 邊光 20
4. 1. 4 踢者光 21
4. 2 角色照明 21
第五章 連續動作之照明配置（LIGHTING FOR CONTINUOUS MOTIONS) 24
第六章 結果與討論（RESULT AND DISCUSSION） 28
第七章 結論（CONCLUSION） 40
參考文獻（REFERENCE） 41

[1] D. Ablan. Digital Cinematography & Directing, chapter 5, pages 56–83. New Riders Press, 2002.

[2] A. A. Apodaca and L. Gritz. Advanced RenderMan: Creating CGI for Motion Pictures, chapter 13-14, pages 337–415. Morgan Kaufmann, 1999.

[3] D. Arijon. Grammar of the Film Language. Hastings House Publishers, 1976.

[4] Autodesk. Maya. In http://www.autodesk.com/maya.

[5] J. Birn. Digital Lighting and Rendering. New Riders Press, 2 edition, 2006.

[6] U. D. Bordoloi and H.-W. Shen. View selection for volume rendering. In Proceedings of the IEEE Visualization 2005, pages 487–494, 2005.

[7] A. C. Costa, A. A. Sousa, and F. N. Ferreira. Lighting design: A goal based approach using optimisation. Render Technique ‘99, pages 317–328, 1999.

[8] J. O’B. Dorsey, F. X. Sillion, D. P. Greenberg. Design and simulation of opera lighting and projection effects. In Proceedings of the 18th annual conference on Computer graphics and interactive techniques, pages 41–50, 1991.

[9] M. S. El-Nasr, I. Horswill. Automating Lighting Design for Interactive Entertainment. Computers in Entertainment(CIE) archive, Volume 2, Issue 2, 2004.

[10] J. M. Gillette. Theatrical Design and Production: An Introduction to Scene Design and Construction, Lighting, Sound, Costume, and Makeup. McGraw-Hill, 4 edition, 1999.

[11] J. M. Gillette. Designing With Light: An Introduction to Stage Lighting. McGraw-Hill, 4 edition, 2002.

[12] S. Gumhold. Maximum entropy light source placement. In Proceedings of the IEEE Visualization 2002, pages 275–282, 2002.

[13] M. Halle and J. Meng. Lightkit: A lighting system for effective visualization. In Proceedings of the 14th IEEE Visualization 2003 (VIS'03), pages 363–370, 2003.

[14] G. Ji and H.-W. Shen. Dynamic view selection for time-varying volumes. IEEE Transactions on Visualization and Computer Graphics, 12(5):1109–1116, 2006.

[15] I. T. Jolliffe. Principal Component Analysis. Springer, 2002.

[16] C. H. Lee, X. Hao, and A. Varshney. Geometry-dependent lighting. IEEE Transactions on Visualization and Computer Graphics, 12(2):197–207, 2006.

[17] J. Marks, B. Andalman, P. A. Beardsley, W. Freeman, S. Gibson, J. Hodgins, T. Kang, B. Mirtich, H. Pfister, W. Ruml, K. Ryall, J. Seims, and S. Shieber. Design galleries: a general approach to setting parameters for computer graphics and animation. In Proceedings of SIGGRAPH 1997, pages 389–400, 1997.

[18] W. O. Parker and R. C. Wolf. Scene design and stage lighting. Harcourt School, 6 edition, 1990.

[19] P. Poulin and A. Fournier. Lights from highlights and shadows. In SI3D’92: Proceedings of the 1992 symposium on Interactive 3D graphics, pages 31–38, 1992.

[20] P. Poulin, K. Ratib, and M. Jacques. Sketching shadows and highlights to position lights. In CGI ’97: Proceedings of the 1997 Conference on Computer Graphics International, pages 56–63, 1997.

[21] S. Rusinkiewicz, M. Burns, and D. DeCarlo. Exaggerated shading for depicting shape and detail. ACM Transactions on Graphics, 25(3):1199–1205, 2006.

[22] C. Schoeneman, J. Dorsey, B. Smits, J. Arvo, and D. Greenburg. Painting with light. In Proceedings of SIGGRAPH 1993, pages 143–146, 1993.

[23] R. Shacked and D. Lischinski. Automatic lighting design using a perceptual quality metric. Computer Graphics Forum, 20(3):215–226, 2001.

[24] S. Takahashi, I. Fujishiro, and Y. T. T. Nishita. A feature-driven approach to locating optimal viewpoints for volume visualization. In Proceedings of the IEEE Visualization 2005, pages 495–502, 2005.

[25] P.-P. V´azquez, M. Feixas, M. Sbert, and W. Heidrich. Viewpoint selection using viewpoint entropy. In Proceedings of the Vision Modeling and Visualization Conference 2001, pages 273–280, 2001.

[26] 邱坤良、簡立人。台灣劇場資訊與工作方法9 - 燈光設計與技術操作手冊。行政院文化建設委員會。1998。