隨著資訊科技的進步，促成了多媒體時代的來臨，3D 電腦動畫的
發展更豐富了數位媒體的內容。在電腦動畫的研究領域中，動作合成
(Motion Synthesis)一直是3D 電腦動畫中非常重要的研究課題。

在本論文中，我們提出了一個基於關節控制來合成三維人體動作
的方法以及相關應用之介面設計。在傳統的2D 動畫製作上，美術人員
常會先在關鍵影格中指定人物的關節角度和位置，其餘的畫格再以各
種的內插法求得。對於動畫師來說，設計符合動畫師需求的介面軟體
是越來越重要的趨勢。我們為配合美術人員已熟悉的操作，並將此理
念推廣至三維空間的人體動作合成，讓使者可以藉由我們系統簡單的
操作來快速的自動產生預期的三維的人體動作。

此外，我們提供三個功能來改變動作的型態，可以藉此產生具誇
張化效果的角色動畫，更提高此方法的實用性。最後我們以實例來驗
證所提出方法的有效性。

A novel three-dimensional human motion synthesis based on
joints editing is proposed. Editing existing joint-trajectories
to synthesize a new motion is a well-known 2D motion synthesis
method. In this study, we extend this notion to threedimensional
human motion synthesis and a prototype motion
synthesis system is implemented. By editing the projected
trajectories of major joints through the user-interface, the
system can synthesize the expected three-dimensional human
motions automatically.

Moreover, functions for synthesizing exaggerated 3D human
motions are also studied and incorporated into the system to
improve its descriptive power. Finally, several empirical
examples are given to demonstrate the effectiveness of the
proposed approach.

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