Motion Doodles: An Interface for Sketching

Character MotionSIGGRAPH ’04Speaker: Alvin

Date: 5 July 2004

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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OutlineIntroductionFrameworkResultConclusionEvaluation Form

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Introduction

A cursive motion specification.An interactive and easy system.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Framework

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Character Sketching

(a) The seven links. (b) Computed major and minor axes. (c) Oriented bounding boxes. (d) Computed joints (e) Computed skeleton.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Motion Sketching

(1) Rough segmentation (2) Corner detection (3)Corner post-processing (4) Merge colinear segments (5) Identify pauses (6) Token assignment.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Sketch Segmentation

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Gesture Vocabulary

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Motion Synthesis

Employ a parameterized keyframe-based motion synthesis.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Sketching in 3D

Position the camera that covers the desired workspace in its FOV.The 3D character is modelled in advance.The 2D sketch segmentation points are back-projected into 3D scene.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Sketching in 3D

Motion moving directly towards or away the camera is difficult to sketch.Some gestures become ambiguous.2 difference : foot placement and direction smoothing.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Result

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Conclusion

A cursive language for sketching.Allow novices to quickly learn.An interactive system.Well-suited for Table PCs and electronic whiteboards.Simple enough for children.

Alivn/GAME Lab./CSIE/NDHU

Motion Doodles: An Interface for Sketching Character Motion

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Evaluation Form

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 (4)結果正確性與完整性 (3)原創性與重要性 (4)讀後啟發與應用：

請就各項選項給予一個分數 ( 0 = poor ~ 5 = excellent )

這篇論文非常的有創意，但對於我們的研究幫助有限，可是其利用將每段動畫分成數個階段的方法，可以套用在我們武功招式上，同樣地將每一個招式也分成數個階段，以減少比對樣本數目。