Object recognition by computer: the role of geometric constraints
Object recognition by computer: the role of geometric constraints
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Interactive manipulation of rigid body simulations
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Sampling plausible solutions to multi-body constraint problems
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Multiple view geometry in computer vision
Multiple view geometry in computer vision
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Shape and Nonrigid Motion Estimation Through Physics-Based Synthesis
IEEE Transactions on Pattern Analysis and Machine Intelligence
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CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
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ICCV '99 Proceedings of the International Conference on Computer Vision-Volume 2 - Volume 2
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Understanding expressive action
Interactive design of rigid-body simulations for computer animation
Interactive design of rigid-body simulations for computer animation
Learning physics-based motion style with nonlinear inverse optimization
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SCA '07 Proceedings of the 2007 ACM SIGGRAPH/Eurographics symposium on Computer animation
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ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Video-based 3D motion capture through biped control
ACM Transactions on Graphics (TOG) - SIGGRAPH 2012 Conference Proceedings
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This paper presents an optimization framework for estimating the motion and underlying physical parameters of a rigid body in free flight from video. The algorithm takes a video clip of a tumbling rigid body of known shape and generates a physical simulation of the object observed in the video clip. This solution is found by optimizing the simulation parameters to best match the motion observed in the video sequence. These simulation parameters include initial positions and velocities, environment parameters like gravity direction and parameters of the camera. A global objective function computes the sum squared difference between the silhouette of the object in simulation and the silhouette obtained from video at each frame. Applications include creating interesting rigid body animations, tracking complex rigid body motions in video and estimating camera parameters from video.