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研究生:李啓暘
研究生(外文):Lee, Chi-Yang
論文名稱:虛擬實境照明設計系統
論文名稱(外文):VR Lighting Design System
指導教授:莊榮宏莊榮宏引用關係
指導教授(外文):Chuang, Jung-Hong
口試委員:莊榮宏林文杰蔡侑庭朱宏國
口試日期:2017-10-12
學位類別:碩士
校院名稱:國立交通大學
系所名稱:多媒體工程研究所
學門:電算機學門
學類:軟體發展學類
論文種類:學術論文
論文出版年:2017
畢業學年度:106
語文別:中文
論文頁數:32
中文關鍵詞:虛擬實境照明設計電腦輔助設計逆向照明
外文關鍵詞:VRVirtual realityLighting designComputer-aided designInverse lighting
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照明設計在遊戲、動畫以及室內設計等領域都扮演著重要的角色,但目前的照明設計系統僅能透過反覆調整每一盞光的各項參數以獲得理想的照明效果,這種流程即使是有經驗的設計師也可能覺得耗費時間且不夠直覺。

在這篇論文中,我們開發一個結合虛擬實境的照明設計系統,其中我們設計三種照明設計介面:直接、間接與逆向介面,我們也提出一個以疊代法計算逆向照明問題 (inverse lighting problem) 的方法。我們的照明設計系統可以讓使用者以更具沉浸感、直覺且有效率的方式進行照明設計。
Lighting design is a crucial process in video games, animation, interior design, and some other fields. Current lighting design systems support only direct lighting paradigm which requires fine-tuning each light's parameters to achieve a global lighting effect.

In this study, we developed an integrated lighting design system which comprises direct, indirect, and inverse paradigms in VR environment. We also propose an iterative method to solve inverse lighting problem in a low time cost. The system provides designers with an immersive, intuitive, and effective way of lighting design.
Contents
摘要 i
Abstract ii
Acknowledgements iii
Contents iv
ListofFigures vi
ListofTables viii
Chapter 1 Introduction 1
Chapter 2 RelatedWorks 3
2.1 IndirectLightingDesignParadigm 3
2.2 InverseLightingDesignParadigm 4
Chapter 3 ProposedMethod 6
3.1 CommonInterface 6
3.2 DirectParadigm 7
3.3 IndirectParadigm 9
3.4 InverseParadigm 12
3.4.1 PaintingSystem 12
3.4.2 InverseLightingProblem 14
3.4.3 IterativeLeastSquaresApproximation(ILSA) 14
3.4.4 SolveExistingLights 16
3.4.5 AddNewLights 17
3.4.6 Summary 20
Chapter 4 ResultsandDiscussions 21
4.1 InverseParadigmEvaluationwithGroundTruth 22
4.2 InverseParadigmEvaluationwithPaintedLightingGoals 24
4.3 UserStudy 26
4.3.1 Participants 27
4.3.2 ResultsofQuestionnaire 27
4.4 Limitations 29
Chapter 5 Conclusion 30
Reference 31
Reference
[1] AnastasiosGkaravelisandGeorgiosPapaioannou.Inverselightingdesignusingacoverage optimizationstrategy. TheVisualComputer,32(6-8):771–780,2016.
[2] Anastasios Gkaravelis, Georgios Papaioannou, and Konstantinos Kalampokis. Inverse lightdesignforhigh-occlusionenvironments. InGRAPP,pages26–34,2015.
[3] Wen-Chieh Lin, Tsung-Shian Huang, Tan-Chi Ho, Yueh-Tse Chen, and Jung-Hong Chuang. Interactive lighting design with hierarchical light representation. In Computer GraphicsForum,volume32,pages133–142.WileyOnlineLibrary,2013.
[4] WilliamBKerrandFabioPellacini.Towardevaluatinglightingdesigninterfaceparadigms for novice users. In ACM Transactions on Graphics (TOG), volume 28, page 26. ACM, 2009.
[5] PierrePoulinandAlainFournier. Lightsfromhighlightsandshadows. InProceedingsof the1992symposiumonInteractive3Dgraphics,pages31–38.ACM,1992.
[6] Fabio Pellacini, Parag Tole, and Donald P. Greenberg. A user interface for interactive cinematic shadow design. In Proceedings of the 29th Annual Conference on Computer Graphics and Interactive Techniques, SIGGRAPH ’02, pages 563–566, New York, NY, USA, 2002. ACM. ISBN 1-58113-521-1. doi: 10.1145/566570.566617. URL http:// doi.acm.org/10.1145/566570.566617.
[7] Juraj Obert, Fabio Pellacini, and Sumanta Pattanaik. Visibility editing for all-frequency shadowdesign.InComputerGraphicsForum,volume29,pages1441–1449.WileyOnline Library,2010.
31
[8] Tobias Ritschel, Thorsten Thormählen, Carsten Dachsbacher, Jan Kautz, and Hans-Peter Seidel. Interactive on-surface signal deformation. In ACM Transactions on Graphics (TOG),volume29,page36.ACM,2010.
[9] ChrisSchoeneman,JulieDorsey,BrianSmits,JamesArvo,andDonaldGreenberg. Painting with light. In Proceedings of the 20th Annual Conference on Computer Graphics andInteractiveTechniques,SIGGRAPH’93,pages143–146,NewYork,NY,USA,1993. ACM. ISBN 0-89791-601-8. doi: 10.1145/166117.166135. URL http://doi.acm.org/ 10.1145/166117.166135.
[10] Pierre Poulin, Karim Ratib, and Marco Jacques. Sketching shadows and highlights to position lights. In Computer Graphics International, 1997. Proceedings, pages 56–63. IEEE,1997.
[11] Amit Shesh and Baoquan Chen. Crayon lighting: sketch-guided illumination of models. InProceedingsofthe5thinternationalconferenceonComputergraphicsandinteractive techniquesinAustraliaandSoutheastAsia,pages95–102.ACM,2007.
[12] Fabio Pellacini, Frank Battaglia, R Keith Morley, and Adam Finkelstein. Lighting with paint. ACMTransactionsonGraphics(TOG),26(2):9,2007.
[13] Hsueh-Tsung Kuo, Chang-Yen Hsieh, Ken-Yi Lee, Shuen-Huei Guan, and Yung-Yu Chuang. Lightingbyguides. Master’sthesis,NationalTaiwanUniversity,2008.
[14] FabioPellacini.envylight: aninterfaceforeditingnaturalillumination.ACMTransactions onGraphics(TOG),29(4):34,2010.
[15] UnityTechnologies. Unity-gameengine,2017. URLhttps://unity3d.com/.
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