Applications of a Motion Capturing System: Music, Modeling, and Animation Chase Finch, Kevin Musselman, Bill Mummert College of Engineering and Science, Clemson University

Motion Capture History Vicon 8 Motion Capturing System Motion Capture in Animation Motion Capture in Modeling Motion Capturing in Adio/Visual Interactions ObservationsConclusions

Brief History of Motion Capture Simon Fraser University’s biomechanics labs start using to computers to analyze human motion Simon Fraser University’s biomechanics labs start using to computers to analyze human motion MIT started using optical tracking systesm Op-Eye and SelSpot “Mike the Talking Head” of Silicon Graphics

Vicon 8 Motion Capturing System Passive System 8 infared cameras tracks “markers” Records cartesian coordinates (x,y,z) Average recording rate of 120 fps Newer system has 12 cameras and records at 484 fps A visual representation of MoCap

Motion Capture & Animation Maps collected data to a virtual character Requires creating a “rig” System of structures in a model with control points to move the model System of structures in a model with control points to move the model Facial motion capture

Motion Capturing in Modeling Using motion capture data to create rigs and models USC derives human skeletal models from volume data

Motion Capturing Audio/Visual Interactions Sound creation usually requires a physical motion ie drawing a bow across a violin requires a precise motion for certain sounds Motion Capture Music Outputs mapped commands to a MIDI creator Dance Instruction References David J. Sturman. A Brief History of Motion Capture for Computer Character Animation. Available at ion/motion_capture/history1.htm ion/motion_capture/history1.htm ion/motion_capture/history1.htm Anderson, R.E. Social impacts of computing: Codes of professional ethics. Social Science Computing Review 10, 2 (Winter 1992), CHI Conference Publications Format. Available at Conger., S., and Loch, K.D. (eds.). Ethics and computer use. Commun. ACM 38, 12 (entire issue). Mackay, W.E. Ethics, lies and videotape, in Proceedings of CHI '95 (Denver CO, May 1995), ACM Press, Schwartz, M., and Task Force on Bias-Free Language. Guidelines for Bias-Free Writing. Indiana University Press, Bloomington IN, 1995.

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