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研究生:楊明烽
研究生(外文):Ming-Fong Yang
論文名稱:於戶外時移影片中光影性質之重建
論文名稱(外文):Recover Photometric Properties of Outdoor Scenes from Time-Lapse Videos
指導教授:詹寶珠詹寶珠引用關係
指導教授(外文):Pau-Choo Chung
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電腦與通信工程研究所
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:2009
畢業學年度:97
語文別:英文
論文頁數:32
中文關鍵詞:立體光度測量陰影偵測太陽方向時移影片
外文關鍵詞:photometric stereoshadow detectiontime-lapse videosun direction
相關次數:
  • 被引用被引用:0
  • 點閱點閱:102
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在本論文中,我們利用立體光度測量(photometric stereo)從真實場景的時移影片(time-lapse video)推算出幾何的光度特性。一般而言,立體光度測量(photometric stereo)大都用來取得室內小型物體的三維模型,或是材質樣本,但透過取得的天空時移影像,我們可以計算出戶外場景建築物上的反射度(reflectance)和表面法線(surface normal)。而從天空的時移影像中,我們可以得到大自然的環境光和太陽的資訊。在本文的最後我們會用重建出來的時移影片(photometric stereo)來證明這些光影性質。
In this paper, we use photometric stereo to estimate geometric and photometric properties of real scenes from time-lapse videos. In general photometric stereo is used to obtain 3D model for small objects or material samples with indoor scenes. By collecting the sky video of the time-lapse video, we can obtain reflectance and surface normal on building of natural lighting outdoor scenes. From the sky video, the natural lighting environments, and sun information are obtained Applications of the reconstruction of the time-lapse video are also demonstrated.
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . i
List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . ii
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . iv
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Related Work . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Proposed architecture . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Sun Position Estimation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Shadow Map Estimation . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Reflectance Color and surface Normal Estimation . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Experimental Results and Discussions . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Performance Evaluations and Comparison . . . . . . . . . . . . . . . . 26
6 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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