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研究生:蔡宗霖
研究生(外文):Tsung-LinTsai
論文名稱:在2D相片的即時街頭藝術創作
論文名稱(外文):Real-Time Street Art Painting on 2D Image
指導教授:李同益李同益引用關係
指導教授(外文):Tong-Yee Lee
學位類別:碩士
校院名稱:國立成功大學
系所名稱:資訊工程學系碩博士班
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:2012
畢業學年度:100
語文別:英文
論文頁數:47
中文關鍵詞:街頭藝術貼圖合成無縫隙複製一點透視依賴於視角
外文關鍵詞:Street arttexture synthesisseamless cloningone-point perspectiveviewpoint dependent
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Street Art是一種視覺藝術, 泛指所有在公共空間的創作藝術, 例如在街道上或是牆上的塗鴉, 或是街道旁的雕像. 近期的藝術家基於相機或人體視覺感知, 在地面上繪畫創作street art藝術, 就能產生彷彿立體呈現在觀看者正前方的錯覺, 而非只是躺在地面上.

本篇論文主要是針對上述能產生錯覺的street art藝術創作. 這個系統利用使用者給予的照片作為輸入, 先給予使用者即時創作的介面, 以及幫助user輕鬆建立三維透視場景的繪畫工具. 用貼圖合成創作出虛構的場景, 並用無縫隙複製揉合整體創作, 我們的系統將使用者創作的東西以元件的形式作為儲存, 使用者能立即地從介面資料庫提取元件, 輕鬆地重建使用者繪畫的進度.這些功能讓使用者能在介面上創作擬真的街頭藝術. 最後提供還原的功能, 使得系統的輸出只要透過一個線性伸縮, 便能重新貼回實地場景. 當使用者的相機條件跟作為輸入的相片條件, 像是視角, 對焦平面...等等的狀況一致時, 使用者拍攝的相片呈現的立體感能跟當初在介面上作畫的一樣, 並在原地形成一張依賴於視角的街頭藝術.
Street art is art, specifically visual art, developed in public spaces. For example, the term can include traditional graffiti artwork on the wall or street, or sculptures by the side of sidewalk .Recently, artist bases on cameras or human visual perception to create street art on the road or street, and presents an illusion that the image appears three-dimensional in the front of viewer, but not lies down on the ground.

This paper focuses on the above-mentioned illusionary street art creations. This system needs user to give an input image, and this study provides an interface for real-time painting, and pictorial tools for assisting user in building a three-dimensional perspective scene easily. When painting on two-dimensional interface, we use texture synthesis to create a virtual scene, and seamless cloning to blend the whole creation. Our system saves user's creation in the form of components, and user can load them from the database of interface immediately, and rebuild user's progress of drawing easily. These functions allow user creating a realistic street art on the interface. Finally, this paper provides the function of recovery which causes that the output of system can re-post on the original scene via a linear scale. If the specification of user's camera (e.g., an angle of view or focal plane...etc.), is the same as before one, the photo of user's shooting can present the same three-dimensioned perception as user's painting on the interface. And result is a viewpoint-dependent street art.
中文摘要. . . . . . . . . . . . . . . . . . . . . . . . iii
Abstract. . . . . . . . . . . . . . . . . . . . . . . . iv
Acknowledgements . . . . . . . . . . . . . . . . . . . v
List of Figures . . . . . . . . . . . . . . . . . . . . viii
1 Introduction . . . . . . . . . . . . . . . . . . . . 1
1.1 Contribution. . . . . . . . . . . . . . . . . . . . 2
2 Related Work . . . . . . . . . . . . . . . . . . . . 5
2.1 Texture Synthesis . . . . . . . . . . . . . . . . . 5
2.2 Seamless cloning . . . . . . . . . . . . . . . . . 5
2.3 Image Relighting . . . . . . . . . . . . . . . . . 7
2.4 One-point perspective . . . . . . . . . . . . . . . 7
3 Algorithm . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Overview . . . . . . . . . . . . . . . . . . . . . 8
3.2 Choosing a background and deciding vanishing point 8
3.2.1 Choosing a background . . . . . . . . . . . . . . 8
3.2.2 Deciding vanishing point . . . . . . . . . . .. . 13
3.3 Creating components . . . . . . . . . . . . . . . . 15
3.4 Components data base . . . . . . . . . . . . . .. . 17
3.5 Components operation . . . . . . . . . . . . . .. . 18
3.5.1 Brightness and contrast . . . . . . . . . . . . . 18
3.5.2 Seamless cloning . . . . . . . . . . . . . . .. . 21
3.6 Brush . . . . . . . . . . . . . . . . . . . . . . . 25
3.6.1 Texture brush . . . . . . . . . . . . . . . . . . 25
3.6.2 Recovery brush . . . . . . . . . . . . . . . . .. 26
3.6.3 Perspective brush . . . . . . . . . . . . . . . . 27
3.7 Relighting . . . . . . . . . . . . . . . . . . . .. 29
3.8 Recovery from perspective plane . . . . . . . . . . 31
4 Interface and Results . . . . . . . . . . . . . . . . 33
4.1 Interface . . . . . . . . . . . . . . . . . . . . . 33
4.2 Result . . . . . . . . . . . . . . . . . . . . . .. 38
4.2.1 Result on the interface . . . . . . . . . . . . . 38
4.2.2 Result of recovering . . . . . . . . . . . . . .. 42
5 Conclusion and Future Work . . . . . . . . . . . . .. 45
5.1 Limitation . . . . . . . . . . . . . . . . . . . .. 45
5.2 Future work . . . . . . . . . . . . . . . . . . . . 45
Reference . . . . . . . . . . . . . . . . . . . . . . . 46
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