不同於過往在發展與普及的道路上走得跌跌撞撞，虛擬實境相關技術的進步在近年間飛速成長，其發展來到了歷史上最蓬勃的時刻，原因在於製造技術的突破使一般消費者能夠負擔得起高效能、高沉浸感的VR設備，普及度的提升從而吸引各路開發者投入開發各式VR應用，然而由於對其「身歷其境」特性的直觀理解，VR應用的種類大多以娛樂、模擬為主。
同時，網路影音社群平台崛起，在這個以小型媒體、自媒體為主的生態中以虛擬化身與觀眾互動的形象經營方式成為了新興的流行，這些經營著虛擬化身形象卻資本有限的媒體創作者們亟欲一套能以負擔得起的成本實現比2D動畫效果更好的化身呈現方案。
本篇論文的研究期望能突破VR應用種類的藩籬、探討VR應用作為媒體內容製作工具的可行性。方法是設計一套虛擬攝影棚系統：利用高階消費級VR設備的定位原理輔以逆向運動學套件，達到全身動作捕捉的效果用以操作3D虛擬化身使其栩栩如生，最後透過虛擬攝影機進行網路直播或影片錄製。

Recently, the advances of virtual reality (VR) technology make numerous VR applications feasible in areas of entertainment and simulation. At the same time, online video platforms become popular and virtual avatars are adopted by many famous YouTubers. We explore the possibility to generate 3D animations of a virtual avatar based on the movements of a real user. A few optical trackers are attached to the user’s limbs as motion capture. Then 3D positions of more joints in the human skeletal system are inferred through inverse kinematics. The automatic mapping from a real user to a virtual avatar can make online broadcast more interesting and appealing in virtual studio.

致謝 i
摘要 iii
Abstract v
目錄 vii
圖目錄 ix
表目錄 xi
第一章 序論 1
1.1 研究動機 1
1.2 研究目的 2
第二章 文獻探討 5
2.1 虛擬實境 5
2.2 3D平台-Unity 5
2.3 HTC Vive 5
2.4 逆向運動學 7
2.5 文獻比較 8
第三章 研究方法 11
3.1 系統架構 11
3.2 虛擬攝影棚的建置 13
3.2.1 設置SteamVR Plugin 13
3.2.2 導入Avatar Model並綁定IK 17
3.2.3 Avatar表情控制與棚內全身鏡 19
3.2.4 虛擬攝影機畫面輸出 24
3.3 系統與使用者的互動方式 27
3.3.1 功能與使用方式 27
3.3.2 兩種畫面輸出模式 30
第四章 實驗成果 35
4.1 成效驗證 35
4.2 成本比較 39
第五章 結論 43
5.1 結果評估 43
5.2 未來發展方向 43
參考文獻 45

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