臺灣博碩士論文加值系統

瑜珈是近年來風行的運動，而數位學習則是近年來的學習趨勢。然目前以數位學習方式學習瑜珈，多只能以文字、圖片、及影像呈現教學內容。本研究希望能以電腦動畫技術，結合瑜珈運動知識，提出一個創新的瑜珈學習方式。我們使用程序式動畫做為人物運動的產生方法，並加入腳本和階層式的參數設計概念，讓使用者可以根據自我的學習需求和不同的體能條件輸入適合的模型和動作腳本，達到客製化教學呈現的目的。我們將動作程序模組化，不同的瑜珈動作之間可共用程序，使程序達到好的重用性，動作庫的擴充也會更容易。我們邀請使用者來操作本系統，體驗在不同參數變化和角色設定下所產生的動畫效果，同時也以評估系統各方面的使用觀感，並和教學影帶做比較。實驗結果顯示使用者對本系統比教學錄影帶有更好的接受度。

In recent years, Yoga is becoming a popular sport while e-learning is also becoming a trend in education and training. However, the way that we learn Yoga with e-learning mostly is through text, picture and video. In this research, we aim at incorporating 3D animation technologies with Yoga domain knowledge by proposing an innovation Yoga e-learning system. We use the approach of procedural animation to generate character motions with the help of XML script and hierarchical parameter design. The resulting animations can be customized for different characters with various physical conditions. Learners can select suitable and tailored character models and motion scripts for them to learn Yoga by themselves. We have tried to design the system by breaking a function into fundamental modules that can be reused in different cases. This design aims at increasing the reusability and extensibility of the proposed animation system. In these reusable procedures, we have made use of the Inverse Kinematics and a lookup table to generate natural 3D animations for articulated figures. In addition, we have implemented a specialized e-learning system based on 3D character animation that can generate customized motions and postures at run-time. We have implemented our tutoring system and designed experiments to study the issues of user interface, customized figures and effectiveness by comparing it with training video. The experimental results show that our system is well accepted by the participants for Yoga learning, and has higher scores than watching video.

第一章 導論………………………………………………………………1
1.1 研究動機與目的…………………………………………………1
1.2 問題描述…………………………………………………………3
1.3 論文貢獻…………………………………………………………5
1.4 本論文之章節架構………………………………………………7
第二章 相關研究…………………………………………………………8
2.1 動畫產生方法……………………………………………………8
2.1.1. 程序式動畫………………………………………………………8
2.1.2. 動作擷取…………………………………………………………11
2.2 人物角色參數化應用……………………………………………13
2.3 瑜珈運動…………………………………………………………14
第三章 系統總覽…………………………………………………………17
3.1 系統架構…………………………………………………………17
3.2 動畫產生流程……………………………………………………20
3.3 人物骨架和模型…………………………………………………22
3.4 關節限制和運動特色參數化……………………………………23
3.5 人物模型腳本和動作腳本描述…………………………………26
第四章 程序式動畫產生…………………………………………………30
4.1 關鍵格之程序設計………………………………………………30
4.1.1. 動作關鍵格………………………………………………………30
4.1.2. 關鍵格產生程序…………………………………………………38
4.2 關鍵格之間的內插方法…………………………………………43
4.2.1. 空間內插方法……………………………………………………43
4.2.2. 時間內插方法……………………………………………………45
4.2.3. 冗餘自由度設計…………………………………………………46
4.2.4. 碰撞修正…………………………………………………………49
第五章 實驗結果與評估…………………………………………………50
5.1 人物使用者介面和系統功能介紹………………………………50
5.2 人物模型參數實驗………………………………………………53
5.2.1. 關節限制參數……………………………………………………54
5.2.2. 人物平衡感和穩定度……………………………………………55
5.3 人物角色客製化實驗……………………………………………61
5.4 使用者評估實驗…………………………………………………62
5.4.1. 實驗設計…………………………………………………………63
5.4.2. 實驗結果與分析…………………………………………………68
第六章 結論與未來發展…………………………………………………73
6.1 結論………………………………………………………………73
6.2 未來發展…………………………………………………………73
參考文獻……………………………………………………………………75
附錄A：人物模型描述之XML Schema………………………………………79
附錄B：人物動作描述之XML Schema………………………………………81
附錄C：三種人物模型腳本範例……………………………………………82

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