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研究生:沈超
研究生(外文):Chao Shen
論文名稱:縮時環場視訊的穩定
論文名稱(外文):Time-lapse Panoramic Video Stabilization
指導教授:洪一平洪一平引用關係
指導教授(外文):Yi-Ping Hung
口試委員:歐陽明莊永裕邱志義
口試日期:2015-07-13
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:資訊網路與多媒體研究所
學門:電算機學門
學類:網路學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:40
中文關鍵詞:縮時視訊環場視訊視訊穩定影像變形相機路徑虛擬實境
外文關鍵詞:Time-lapse videoPanoramic videoVideo stabilizationImage warpingCamera pathVirtual reality
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在虛擬實境用戶體驗中,使用基於圖片渲染的環場視訊越來越普 遍,通過縮時來觀看已經錄好的冗長的視訊则是用戶的普遍選擇。然 而,縮時會放大視訊原本就存在的抖動,沉浸式觀看抖動的視訊更會 使得用戶頭暈和不舒服。
我們的目標是產生穩定的縮時環場視訊。我們第一個提出了一種可 以獲得穩定的縮時環場視訊的方法。我們首先闡述一個基本的視訊穩 定的方法框架以及如何改進使得可以減輕視差帶來的問題。然後我們 提出適用於環場視訊穩定的方法,適用於縮時視訊穩定的方法以及縮 時環場視訊穩定的方法。最後我們回顧最終的完整的處理方法以及驗 證效果。虛擬實境用戶體驗中使用穩定的縮時環場視訊可以得到很好 的效果。


Image-based rendered panoramic videos are used in virtual reality user experiences commonly. Long videos recorded in situations and speed up watching by a created time-lapse video is a natural choice for users. Videos will be further shaking because of the time warping. Immersion viewing shaking videos are bring dizzy and uncomfortable for users.
Our goal is the time-lapse panoramic videos stabilization. Our paper propose the first method which can perform time-lapse panoramic videos stabilization well. We propose a traditional video stabilization framework and how to use Laplacian mesh warping method to correction the parallax error of the frames first. Then we optimize the proposed framework to fit panoramic videos well. After that, we extend the basic framework by an optimized frames selection method to generating time-lapse videos. Finally, we go through our approaches and evaluation by using several input videos. Using stabilized panoramic videos in virtual reality user experiences provide good results.


口試委員會審定書i
致謝 ii
中文摘要 iii
Abstract iv
Contents v
List of Figures vii
List of Tables viii
1 Introduction 1
2 Related Work 4
3 Basic Video Stabilization Framework 8
3.1 DynamicScenesHandling ......................... 8
3.2 ParallaxHandling.............................. 11
3.2.1 LaplacianMeshWarping...................... 12
4 Panoramic Processing 16
4.1 PanoramicVideoStabilization ....................... 16
4.2 PanoramicProcessingEvaluation...................... 19
4.2.1 PanoramicAnalysis ........................ 21
4.2.2 CompareWithVideoStitch..................... 21
5 Time-lapse Processing 23
5.1 OptimalFrameSelection .......................... 23
5.1.1 ShakinessCost ........................... 24
5.1.2 VelocityCost............................ 25
5.1.3 AppearanceCost .......................... 25
5.1.4 OptimalFrameSelection...................... 26
5.2 SingleCameraPathOptimization ..................... 28
5.3 Time-lapseVideoStabilizationEvaluation . . . . . . . . . . . . . . . . . 31
5.3.1 Single Camera Path Optimization Analysis . . . . . . . . . . . . 32
5.4 Time-lapsePanoramicVideoStabilization . . . . . . . . . . . . . . . . . 33
6 Conclusions 37
Bibliography 38

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