Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Motion Cues for Illustration of Skeletal Motion Capture Data Simon Bouvier-Zappa Victor Ostromoukhov Pierre Poulin LIGUM, Dept. I.R.O Université de Montréal Symposium on Non-Photorealistic Animation and Rendering, 2007 Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 1 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Outline Motivation 1 Motion Capture Hierarchy 2 Motion Cues 3 Results 4 5 Video Conclusion 6 Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 2 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Outline Motivation 1 Motion Capture Hierarchy 2 Motion Cues 3 Results 4 5 Video Conclusion 6 Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 3 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Limitations Of The 2D Image Conversion of 4D { x , y , z , t } information to 2D { x , y } data Artists use visual cues to compensate inherent limitations of the visualization medium. Motion cues are visual cues emphasizing temporal information in a static 2D representation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 4 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Limitations Of The 2D Image Conversion of 4D { x , y , z , t } information to 2D { x , y } data Artists use visual cues to compensate inherent limitations of the visualization medium. Motion cues are visual cues emphasizing temporal information in a static 2D representation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 4 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Limitations Of The 2D Image Conversion of 4D { x , y , z , t } information to 2D { x , y } data Artists use visual cues to compensate inherent limitations of the visualization medium. Motion cues are visual cues emphasizing temporal information in a static 2D representation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 4 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Limitations Of The 2D Image Conversion of 4D { x , y , z , t } information to 2D { x , y } data Artists use visual cues to compensate inherent limitations of the visualization medium. Motion cues are visual cues emphasizing temporal information in a static 2D representation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 4 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Limitations Of The 2D Image Conversion of 4D { x , y , z , t } information to 2D { x , y } data Artists use visual cues to compensate inherent limitations of the visualization medium. Motion cues are visual cues emphasizing temporal information in a static 2D representation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 4 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Visual Cues Technical design 1 Cartoon illustration 2 Storyboard illustration 3 [Agrawala et al. 2003] Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 5 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Visual Cues Technical design 1 Cartoon illustration 2 Storyboard illustration 3 [Collomosse et al. 2005] Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 5 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Visual Cues Technical design 1 Cartoon illustration 2 Storyboard illustration 3 [Nienhaus et al. 2005] Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 5 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Visual Cues Technical design 1 Cartoon illustration 2 Storyboard illustration 3 [Goldman et al. 2006] Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 5 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Clear Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Clear Robust Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Clear Robust Interactive Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Clear Robust Interactive Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Criteria For The Motion Cue Evocative Clear Robust Interactive Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 6 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion A Quick Example Is this character in motion ? If so, what is he doing ? Motion cues can help reconstitute past and future motions. Other cues will emphasize subtle, otherwise imperceptible, movements. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 7 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion A Quick Example Is this character in motion ? If so, what is he doing ? Motion cues can help reconstitute past and future motions. Other cues will emphasize subtle, otherwise imperceptible, movements. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 7 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion A Quick Example Is this character in motion ? If so, what is he doing ? Motion cues can help reconstitute past and future motions. Other cues will emphasize subtle, otherwise imperceptible, movements. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 7 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Outline Motivation 1 Motion Capture Hierarchy 2 Motion Cues 3 Results 4 5 Video Conclusion 6 Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 8 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Capturing Motion On A Single Bone We extract a sequence of points at γ on the bone from pose t i − to pose t i + to create a motion curve. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 9 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Capturing Motion On A Single Bone The motion curve gives satisfactory results for translations and most rotations. The motion curve cannot evaluate the rolling value in a rotation. Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 10 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Possible Result Using Such Technique Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 11 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Subdivide The Skeleton In Joint Groupings Form anatomically meaningful groups of bones Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 12 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Subdivide The Skeleton In Joint Groupings Isolate articulated path Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 12 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Subdivide The Skeleton In Joint Groupings Identify local root quaternion Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 12 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Subdivide The Skeleton In Joint Groupings Define a point at distance γ on the articulated path Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 12 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Subdivide The Skeleton In Joint Groupings Extract the “roll” value from the local root quaternion Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 12 / 35
Motivation Motion Capture Hierarchy Motion Cues Results Video Conclusion Modified Result With Improved Technique Before After Bouvier-Zappa, Ostromoukhov, Poulin (Université de Montréal) NPAR 2007 13 / 35
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