洪一平臺灣大學：資訊工程學研究所黃邦洪Huang, Pang-HungPang-HungHuang2007-11-262018-07-052007-11-262018-07-052005http://ntur.lib.ntu.edu.tw//handle/246246/53916近年來，環物影像技術已經被使用在許多領域上，例如在電子商務、數位典藏、數位博物館等等，但目前並沒有一個工具可以協助使用者進行環物影片拍攝，以取得較佳的環物影片，也就是環物影片的旋轉中心會落在物體重心。 在本論文中，我們發展一套環物拍攝架的校正方法，係利用運動模型(kinematic model)來描述拍攝架中可控制的轉軸間的三維關係，進而反推出每個軸在三度空間的位置。並根據已計算出的資料提供視覺化的工具，以協助使用者進行調整拍攝架。使用者可以透過這個工具，在開始拍攝物體前，先對架子做調整的動作，讓相機光軸與其它軸可相交在同一點，我們稱之為拍攝中心點。另外，經由校正之後，我們也可以得到較精確的相機參數，而在很多的應用上會需要使用該相機參數，比如物體的三維重建等。在本論文中，我們利用這些取得的環物影片及參數來重建物體的三維模型，並利用這個模型來自動調整該環物影片，藉此來改善環物影片的呈現品質。Object Movie (OM) is a set of images taken from different perspectives around a 3D object. Recently, the technique of the OM has widely applied to many areas, e.g., E-Commerce, digital Archive, Digital Museum, and etc. From the best of our knowledge, there has no method to help the user to obtain a high quality OM, i.e., the rotation center is the same as the center of the object when browsing the OM. In this thesis, I develop a method to calibrate the motorized object rig. First I apply the CPC model to formulate the 3D configuration of the device, and then estimate the controllable axes of the device. Based on the estimation result, I provide a visual tool to help the user to adjust the orientations and positions of the axes. After calibration, the camera parameters that are more accurate can be obtained, and could be used to many applications. In this thesis, I use the parameters to reconstruct the 3D model of the 3D object from an OM, and then adjust the OM according to the center of the 3D model. So that I can obtain a high quality OM.Chapter 1 Introduction 1 1.1 OMs Acquisition 1 1.2 Problem Definition 2 1.3 Review of Related Work 4 Chapter 2 Calibration of Motorized Object Rig 6 2.1 Estimation of Camera Parameters 9 2.2 CPC model 11 2.2.1 Singularity-Free Line Representation 11 2.2.2 CPC Modeling Convention 14 2.3 Calibration using CPC Model 16 2.3.1 Rotation Parts 19 2.3.2 Translation Part 25 2.3.3 Axes Adjustment 26 Chapter 3 Applications 30 3.1 Reconstruction of Visual Hull 33 3.2 Centralization of Object Movie 35 3.3 Others 37 Chapter 4 Experimental Results 38 4.1 Results 38 4.2 Discussion 43 Chapter 5 Conclusions and Future Works 57 5.1 Conclusions 57 5.2 Future Works 58en-US環物影片CPC運動模型三維重建影像位移Object MovieCPC Kinematic Model3D ReconstructionImage Shiftingthesis