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ProfessorDepartment of Computer Science & Engineering
Indian Institute of Technology Delhi
April 26, 2007
Visiting ProfessorDayalbagh Educational Institute
View Dependent Character Animation
Prem K Kalra
Slide Slide 33
Introduction
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Introduction
Consider the freeze-frame camera rotate shot of Matrix
Want to create a similar effect in an animated shot…
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Introduction
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Introduction
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• Obvious approach for any camera moving shot
• The camera-character relationship is very
fundamental to animation
• View dependent animation – animation that
automatically changes in response to changes in
view point
Introduction
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View Space
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View Space
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View Space
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View Space
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View Space
Animation Generation
Not just view direction!
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View Dependent Animation Using Sketches
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Given Sketch Desired 3D Pose
Creating View Dependent Models
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Given Sketch Desired 3D Pose
??
Creating View Dependent Models
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Inputs
Creating View Dependent Models
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Inputs
Sketches
3D Base Mesh Model
Skeleton Lattice
Creating View Dependent Models
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Camera Recovery
Creating View Dependent Models
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Camera Recovery
Joint (rigid) correspondences between sketch and the 3D base model
Creating View Dependent Models
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Camera Recovery
Solve for the best camera
Creating View Dependent Models
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Pose Estimation
Creating View Dependent Models
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Pose EstimationInverse Kinematics and Free Form Deformation
Creating View Dependent Models
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Pose Estimation
Creating View Dependent Models
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Deformation
Creating View Dependent Models
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Deformation
Creating View Dependent Models
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Deformation
Direct Free Form Deformation
Creating View Dependent Models
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Deformation
Direct Free Form Deformation
Creating View Dependent Models
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The View Space
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Some Results
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Some Results
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Some Results
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View Dependent Animation Using Video and Multi Modal
Inputs
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From Video
Input Video
ContourTracking
CameraTracking
ResultingAnimation
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Multi Modal Inputs
Video
Sketches
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Other Possibilities
• Stylistic re-use
• Fusing motion capture data and key frame animation
• Synchronized multiple video streams
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Other Possibilities
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Conclusion
• A frame work for view dependent animation
• Multi modal inputs
• Sketches, Video, Mixed
• Semi automatic computer vision techniques
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Thank You
