motion capture editing

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Cartoon Animation Editing : 

Cartoon Animation Editing Jaewon Song 2010. 05. 26

Slide 2: 

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Table of Contents : 

Table of Contents Introduction Key Framing vs. Motion Capture Motion Capture System Problem of Motion Capture System Cartoon Animation Editing

Key framing : 

Key framing

Key framing : 

Key framing Good Can animate anything what you want Can represent emotion, feeling and characteristics of characters Bad Hard to make a motion Only few skilled animator can make reliable animation Time, effort and expenses

Motion Capture : 

Sensing, digitizing and recording of motion All the fine details of human motion will be reproduced Motion Capture

Motion Capture : 

Motion Capture History Eadweard Muybridge (1830 – 1904) Animal locomotion

Motion Capture : 

Motion Capture History Rotoscope Max Fleischer 1915

Motion Capture : 

Motion Capture Magnetic Sensors on the body No occlusion & correspondence Limited accuracy Smaller workspace Heavier sensors and wires of body Sensitive to electromagnetic interference

Motion Capture : 

Motion Capture Mechanical Exoskeleton No range limit No occlusion / correspondence Restriction movement Fixed sensor positions

Motion Capture : 

Motion Capture Optical(passive) Generally used High quality & stable Object capture Need to big space Occlusion/Correspondence problem

Motion Capture : 

Motion Capture

Motion Capture : 

Motion Capture Optical (active) Same concept as passive Can reduce occlusion & correspondence problems

Motion Capture : 

Motion Capture Acoustic Motion Capture Puppet Motion Capture Computer Vision Method

Motion Capture : 

Motion Capture iMocap

Motion Capture : 

Motion Capture Motion Retargeting Cannot apply another character directly Using the Skeleton Hierarchy

Motion Capture : 

Facial Retargeting Motion Capture Source Blendshape Target Blendshape

Motion Capture : 

Motion Capture Motion capture is always good for making an animation?

Motion Capture vs. Keyframing : 

Motion Capture vs. Keyframing “The main problem with motion capture associated with characters has to do with mass-distribution, weight and exaggeration. It is impossible for a performer to produce the kind of motion exaggeration that a cartoon character needs, and the mass and weight of the performer almost never looks good when applied to a character of different proportions.” - Eric Darnell (Codirector of <Antz>) “모션 캡쳐와 관련된 중요한 문제들은 중량의 배분, 무게감, 그리고 과장에 대한 것이다. 연기자들은 만화 캐릭터와 같이 과장된 동작을 연기할 수 없고, 신체 비례가 다른 캐릭터에 적용되었을 때 중량의 이동이 결코 좋게 보이지 않는다.” - 에릭 다넬(영화 <개미> 의 공동감독)

Motion Capture vs. Keyframing : 

Motion Capture vs. Keyframing “The Motion Captured from the human actor could not give us the lizard-like motion we were seeking… We found that the Godzilla motion we wanted was one that maintained the sense of huge mass and weight. No human actor could give this result.” - Karen Goulekas(<Godzilla> visual effects supervisor) “우리가 모션 캡쳐를 사용하지 않은 이유는 간단하다. 사람으로부터 녹화한 동작 데이터는 우리가 찾고 있던 도마뱀 같은 움직임을 주지 못했다. 모션 캡쳐는 고질라의 거대한 중량감도 반영하지 못했다. 어떤 연기자도 우리가 원하는 결과를 주지 못 했다.” - 카렌 골리카스 (영화 <고질라> 의 특수 효과 담당)

Motion Capture vs. Keyframing : 

Motion Capture vs. Keyframing Weight Exaggeration Characteristics

Questions : 

Questions How to make a cartoon style animation from non-cartoon style animation data?

Cartoon Animation Filter : 

Cartoon Animation Filter SIGGRAPH 2006 Jue Wang (University of Washington) Animation

Cartoon Style Animation : 

Cartoon Style Animation

Cartoon Animation Filter : 

Concept Cartoon Animation Filter

Cartoon Animation Filter : 

Cartoon Animation Filter : convolution : Inverted Laplacian of a Gaussian

Cartoon Animation Filter : 

Examples Cartoon Animation Filter

Cartoon Animation Filter : 

Cartoon Animation Filter Cannot modification Applying uniformly

Cartoon Animation Editing : 

Cartoon Animation Editing Making the cartoon style animation from motion capture data

Cartoon Animation Editing : 

Cartoon Animation Editing Input Mocap Data Cartoon Style Animation Learning Data Set Output

Cartoon Animation Editing : 

Cartoon Animation Editing Input Mocap Data Walk cycling Cartoon Style Animation Characteristics Data Set Output

Cartoon Animation Editing : 

Cartoon Animation Editing Input Mocap Data Animator Animation Works Learning Data Set Output

Cartoon Animation Editing : 

Cartoon Animation Editing Adding motions Changing timing Modifying exaggeration

Cartoon Animation Editing : 

Cartoon Animation Editing

Thank You! : 

Thank You! Jaewon Song 2010. 05. 26

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