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研究生: 李奕賢
論文名稱: 針對平面背景下的多視角影像進行前景物體之自動切割
Automatic Foreground Segmentation from Multi-view Images with Planar Background
指導教授: 賴尚宏
口試委員: 陳祝嵩
陳永昌
賴尚宏
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 資訊工程學系
Computer Science
論文出版年: 2012
畢業學年度: 100
語文別: 英文
論文頁數: 38
中文關鍵詞: 切割前景物體平面背景
外文關鍵詞: segmentation, foreground object, background planar
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  • 在本篇論文中,我們提出了一個在多視角影像中進行前景切割的演算法。在我們的系統中,我們將目標物體放在一平面上,利用相機圍繞著目標物對著物體拍攝一系列的影像,在解決整個問題之前,我們系統有兩個最主要的假設:1) 前景目標物會在每張影像中完全的出現;2) 背景像素具有相同的平面投影轉換,換句話說,前景物體與背景區域有不同的轉換方式。首先,我們利用運動恢復結構方法來求得相機在不同視角下的參數,並且使用已求得的背景平面上的特徵點來計算不同視角影像之間的平面投影矩陣。利用以上的所得資訊和兩個主要假設,我們在前景切割這個主要步驟定義了一個能量方程式,其中我們使用了一些顏色距離的集合在區塊基礎之下,然後利用可信度傳遞的方法來將我們所定義的能量方程式最小化。當我們得到目標物在不同視角影像中的輪廓圖後,我們可以使用影像基礎視覺船體方法和Poisson物體表面重建方法來將目標物的三維模型建立出來。


    Chapter 1. Introduction .1 1.1 Motivation 1 1.2 Problem Description 1 1.3 Main Contributions 3 1.4 Thesis Organization 3 Chapter 2. Previous Works 4 2.1 3D Models Building System 4 2.2 The Image-based Model System 5 2.3 Bilayer Segmentation in Multiple Views 5 Chapter 3. Proposed Foreground Segmentation Algorithm 8 3.1 Assumption 9 3.2 Image Calibration 11 3.2.1 Camera Caibration Parameters Estimation 11 3.2.2 Plane Projection Transformation 13 3.3 Foreground Extraction 15 3.3.1 Definition 15 3.3.2 Energy Function Minimization by BP 17 3.4 3D Model Reconstruction via Image-based Visual Hull 22 Chapter 4. Experimental Results 24 Chapter 5. Conclusion 34 References 36

    [1] W. Matusik, C. Buehler, R. Raskar, S.J. Gortler, and L. McMillan, “Image-based Visual Hulls,” Special Interest Group on Graphics and Interactive Techniques, 2000.
    [2] M. Pollefeys, “Self-calibration and Metric Reconstruction Inspite of Varying and Unknown Intrinsic Camera Parameters,” International Journal of Computer Vision, 1999.
    [3] A. Laurentini, “The Visual Hull Concept for Silhouette-based Image Understanding,” IEEE Transactions on Pattern Analysis and Machine Intelligence, 1994.
    [4] P. H. Huang, C. M. Cheng, H. L. Yang, S. H Lai, and S. Y. Yang, “On-line 3D Modeling System Using a General Webcam and a Turntable.” IPPR Conference on Computer Vision, Graphics, and Image Processing, 2009.
    [5] G. F. Zhang, J. Y. Jia, W. Hua, and H. J. Bao, “Robust Bilayer Segmentation and Motion/Depth Estimation with a Handheld Camera,” IEEE Transactions on Pattern Analysis and Machine Intelligence, 2011.
    [6] W. Lee, W. Woo, and E. Boyer, “Silhouette Segmentation in Multiple Views,” IEEE Transactions on Pattern Analysis and Machine Intelligence, 2010.
    [7] B. Micusik and A. Hanbury, “Automatic Image Segmentation by Positioning a Seed,” European Conference on Computer Vision, 2006.
    [8] E. N. Mortensen and J. Jia, “Real-time Semi-automatic Segmentation Using a Bayesian Network,” Computer Vision and Pattern Recognition, 2006.
    [9] “GML C++ Camera Calibration Toolbox,” http://graphics.cs.msu.ru/en/science/research/calibration/cpp, 2009.
    [10] “Camera Calibration Toolbox for Matlab,” http://www.vision.caltech.edu/bouguetj/calib doc, 2009.
    [11] D. G. Lowe, “Distinctive Image Features from Scale-Invariant Keypoints,” International Journal of Computer Vision, 2004.
    [12] R. Hartley and A. Zisserman, “Multiple View Geometry in Computer Vision,” Second Edition Cambridge University Press, 2004.
    [13] P. F. Sturm and S. J. Maybank, “On Plane-based Camera Calibration: A General Algorithm, Singularities, Applications,” Computer Vision and Pattern Recognition, 1999.
    [14] T. F Su, Y. L. Chen, and S. H Lai, “Over-Segmentation Based Background Modeling and Foreground Detection with Shadow Removal by Using Hierarchical MRFs,” ACCV Proceedings of the 10th Asian conference on Computer vision, 2010.
    [15] P. F. Felzenszwalb and D. P. Huttenlocher, “Efficient Belief Propagation for Early Vision,” International Journal of Computer Vision, 2006.
    [16] N. Amenta, M. Bern, and M. Kamvysselis, “A New Voronoi-based Surface Reconstruction Algorithm,” Proc. 25th Annual Conference on Computer Graphics and Interactive Techniques, 1998.
    [17] M. Kazhdan, M. Bolitho and H. Hoppe, “Poisson Surface Reconstruction,” Eurographics Symposium on Geometry Processing, 2006.
    [18] G. Zhang, X. Qin, W. Hua, T. T. Wong, P. A. Heng, and H. Bao, “Robust Metric Reconstruction from Challenging Video Sequences,” Computer Vision and Pattern Recognition, 2007.
    [19] E. Boyer, “On Using Silhouettes for Camera Calibration,” Asian Conference on Computer Vision, 2006.

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