Retargetting Motion to New Characters

1. Retargetting Motion to New Characters SIGGRAPH ’98 Speaker: Alvin Date: 6 July 2004

2. Outline • Introduction • Framework • Result • Conclusion • Evaluation Form Retargetting Motion to New Characters

3. Introduction • Adapting the motion with identical structure but different segment lengths. • Preserve properties of the original motion as many as possible. • The solver is spacetime constraints method. • The method is off-line. Retargetting Motion to New Characters

4. Framework • Constraint Definition • Start Points Modification • B-spline Representation • Constrainted Optimisation • (optional) Start Points Re-modification Retargetting Motion to New Characters

5. Start Points Modification Retargetting Motion to New Characters

6. B-spline Representation • Use Motion Displacement Maps. • Use the solver to find d(t). • Cubic B-splines control points are spaced every 2,4, or 8 frames. Retargetting Motion to New Characters

7. Constrainted Optimisation Objective Function • The key computation of this the retargetting approach. • The types of the solver: • Least-squares solver • SQP style solver • LMULT solver Retargetting Motion to New Characters

8. Start Points Re-modification • If Constrainted Optimisation does not satisfy, replace M1(t) with (M1(t) + d(t)) and use a denser set of control points. Retargetting Motion to New Characters

9. Result Retargetting Motion to New Characters

10. Conclusion • Computing an adaptation as a constrained optimization. • Use geometric constraints and a simple objective function. Retargetting Motion to New Characters

11. 論文簡報部份 完整性介紹(3) 系統性介紹(4) 表達能力(4) 投影片製作(3) 論文審閱部分 瞭解論文內容(3) 結果正確性與完整性(3) 原創性與重要性(5) 讀後啟發與應用： Evaluation Form 這篇論文所使用的方法是使用MoCap資料必備的基本常識 ，將動畫資料套用在同樣結構的不同骨架上，對於我們的 研究來說，這是必須實作完成的一項技術。 Retargetting Motion to New Characters