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Path-space Motion Estimation and Decomposition for Robust Animation Filtering

Henning Zimmer, Fabrice Rousselle, Wenzel Jakob, Oliver Wang, David Adler, Wojciech Jarosz, Olga Sorkine-Hornung, Alexander Sorkine-Hornung
2015 Computer graphics forum (Print)  
Secondly, motion vectors are needed to establish correspondence between the pixels in different frames, but it is unclear how to obtain them for most kinds of light paths (e.g. an object seen through a  ...  To reduce these ambiguities, we propose a general decomposition framework, where the final pixel color is separated into components corresponding to disjoint subsets of the space of light paths.  ...  We also thank our colleagues at the Walt Disney Animation Studios and Industrial Light & Magic for fruitful discussions. Wenzel Jakob was supported by an ETH/Marie Curie fellowship.  ... 
doi:10.1111/cgf.12685 fatcat:pnib7m67kbf6pg55vyb66flgo4

Generalizing wave gestures from sparse examples for real-time character control

Helge Rhodin, James Tompkin, Kwang In Kim, Edilson de Aguiar, Hanspeter Pfister, Hans-Peter Seidel, Christian Theobalt
2015 ACM Transactions on Graphics  
We robustly estimate wave properties -amplitude, frequency, and phase -for a set of interactively-defined gestures by mapping user motions to a low-dimensional independent representation.  ...  For animations such as locomotion, wave properties map naturally to stride length, step frequency, and progression, and allow smooth transitions from standing, to walking, to running.  ...  Acknowledgements We thank Gabi Kussani, our professional Hohnsteiner puppeteer, our animators Gottfried Mentor and Cynthia Collins, Yeongho Seol for his correspondence and his dinosaur character, Gregorio  ... 
doi:10.1145/2816795.2818082 fatcat:gxcgf4ka2nhmfo5cq5nvucy2ju

Temporal alignment of communicative gesture sequences

Alexis Heloir, Nicolas Courty, Sylvie Gibet, Franck Multon
2006 Computer Animation and Virtual Worlds  
We propose a representation space that may be considered as robust to the spatial variability induced by style.  ...  Next, a low resolution path [p, q] is found for the coarsened motion series (l. 10) and projected to a higher resolution (l. 11).  ...  Bruderlin & al. [9] perform frequency decomposition of motion signal by using multiresolution filtering. Motion blending is then obtained by separately handling motion frequency components.  ... 
doi:10.1002/cav.138 fatcat:6fb2alanvnb2peegnirenmwqwe

A Biologically Inspired Model for the Detection of External and Internal Head Motions [chapter]

Stephan Tschechne, Georg Layher, Heiko Neumann
2013 Lecture Notes in Computer Science  
However, when visual signals are used for training of classifiers for non-articulated communication signals, a decomposition is advantageous.  ...  The model is probed with video samples and outputs occurrences and magnitudes of extrinsic and intrinsic motion patterns.  ...  In [3] head-pose and facial expressions are estimated graphics and animation. Here, an affine deformation with parallax is modelled to fit active contours using singular value decomposition.  ... 
doi:10.1007/978-3-642-40728-4_29 fatcat:3rjc7uhmdjbhfex2fr46xa3iui

A singular value approach for humanoid motion analysis and simulation

Adrien Datas, Pascale Chiron, Jean-Yves Fourquet
2012 2012 12th International Conference on Control Automation Robotics & Vision (ICARCV)  
A singular value approach for humanoid motion analysis and simulation.  ...  Pattern of singular values serve as a basis for a discussion concerning the similarity of simulated and real motions.  ...  Thus, singular value decomposition and filtering will depend on the priority of the task. IV. MOTION CAPTURE, PLAY-BACK AND ANALYSIS A.  ... 
doi:10.1109/icarcv.2012.6485377 dblp:conf/icarcv/DatasCF12 fatcat:mq33mrm7jrfsxk2raghcrsgnbi

Camera Pose Filtering with Local Regression Geodesics on the Riemannian Manifold of Dual Quaternions [article]

Benjamin Busam and Tolga Birdal and Nassir Navab
2017 arXiv   pre-print
We provide an outlier-robust IRLS algorithm for generic pose filtering exploiting this manifold structure.  ...  Time-varying, smooth trajectory estimation is of great interest to the vision community for accurate and well behaving 3D systems.  ...  We represent rigid body movements as trajectories on DH 1 where we filter noisy paths. Regression models for interpolation are essential for computer animation and refinement of pose data [26] .  ... 
arXiv:1704.07072v4 fatcat:qup7lbp4czfhpptcxcaktidnme

Camera Pose Filtering with Local Regression Geodesics on the Riemannian Manifold of Dual Quaternions

Benjamin Busam, Tolga Birdal, Nassir Navab
2017 2017 IEEE International Conference on Computer Vision Workshops (ICCVW)  
We provide an outlier-robust IRLS algorithm for generic pose filtering exploiting this manifold structure.  ...  Time-varying, smooth trajectory estimation is of great interest to the vision community for accurate and well behaving 3D systems.  ...  We represent rigid body movements as trajectories on DH 1 where we filter noisy paths. Regression models for interpolation are essential for computer animation and refinement of pose data [26] .  ... 
doi:10.1109/iccvw.2017.287 dblp:conf/iccvw/BusamBN17 fatcat:c7t4kbxacfeqxo53rl36qmdoki

Large Angle based Skeleton Extraction for 3D Animation [article]

Hugo Martin, Raphael Fernandez, Yong Khoo
2016 arXiv   pre-print
and robustness.  ...  In this paper, we present a solution for arbitrary 3D character deformation by investigating rotation angle of decomposition and preserving the mesh topology structure.  ...  In the depth of the recovery phase, our depth estimation method greatly accelerate the reconstruction process and hierarchical optimization method based on two new laws, focusing on the transition arc  ... 
arXiv:1608.05045v1 fatcat:ghx7swaycnfcrhrdstp65yaqgy

The mind of a robot

Michael Brady, Huosheng Hu
1994 Philosophical Transactions of the Royal Society of London Series A Physical and Engineering Sciences  
We sketch the design of such an agent and discuss some of the issues that the design of such agents raises for intelligence and the mind.  ...  The Kalman filter maintains an estimate of the state a: of a system and a covariance estimate P of its uncer-23 tainty.  ...  Measurements of gait began with Muybridge s photographic sequences of animals in motion. In AI terms, gait has been the base representation for thinking about legged locomotion.  ... 
doi:10.1098/rsta.1994.0110 fatcat:omx4nlplvfccdphyy3gnuo76za

Olfactory coordinated area coverage

Svetlana Larionova, Nuno Almeida, Lino Marques, A. T. de Almeida
2006 Autonomous Robots  
the need of expensive sensing capabilities, map building or complex algorithms for task scheduling.  ...  The experimental results show that the use of olfactory capabilities allows to efficiently cover and clean a certain area, and demonstrate the possibility of coordinating several mobile robots without  ...  Acknowledgments This research was supported by the FCT (Portuguese Foundation for Science and Technology) under the project RoboNose  ... 
doi:10.1007/s10514-006-7099-7 fatcat:g3amfmodmvbf7i3bjw4xho3ab4

Tracking an Object with Unknown Accelerations using a Shadowing Filter [article]

Kevin Judd
2015 arXiv   pre-print
Although stochastic methods of filtering or state estimation (Kalman filters and particle filters) are widely used, out of vogue variational methods are more appropriate in this tracking context, because  ...  The resulting filter is efficient (reduces to the solution of linear equations) and robust (uneffected by missing data and singular correlations that would cause catastrophic failure of Bayesian filters  ...  Optimal tracking (filtering or state estimation) requires identification of the appropriate length and time scales of a object's motion, and the magnitudes of the uncertainty (observational and dynamical  ... 
arXiv:1502.07743v1 fatcat:gespww2qvffnfgusrsgmcjhyha

Recent Advances in Adaptive Sampling and Reconstruction for Monte Carlo Rendering

M. Zwicker, W. Jarosz, J. Lehtinen, B. Moon, R. Ramamoorthi, F. Rousselle, P. Sen, C. Soler, S.-E. Yoon
2015 Computer graphics forum (Print)  
They typically estimate the errors of several reconstruction filters, and select the best filter locally to minimize error.  ...  Some of these techniques are proving useful in real-world applications, and we aim to provide an overview for practitioners and researchers to assess these approaches.  ...  Acknowledgments We would like to thank the following persons and institutes for making 3D 143886.  ... 
doi:10.1111/cgf.12592 fatcat:yejby37itfeg5mzo4w5adtnjxa

Perception-based fast rendering and antialiasing of walkthrough sequences

K. Myszkowski, P. Rokita, T. Tawara
2000 IEEE Transactions on Visualization and Computer Graphics  
AbstractÐIn this paper, we consider accelerated rendering of high quality walkthrough animation sequences along predefined paths.  ...  The final animation quality is enhanced by an efficient spatiotemporal antialiasing which utilizes the IF to perform a motioncompensated filtering.  ...  ACKNOWLEDGMENTS Special thanks to Scott Daly for his stimulating comments on video quality metrics and to Eric Fausett for proofreading of the manuscript.  ... 
doi:10.1109/2945.895880 fatcat:puizvouginbjrbs7kegekas73m

Cognitive Navigation Based on Nonuniform Gabor Space Sampling, Unsupervised Growing Networks, and Reinforcement Learning

A. Arleo, F. Smeraldi, W. Gerstner
2004 IEEE Transactions on Neural Networks  
Visual sensory aliasing is eliminated by taking into account self-motion signals via path integration.  ...  This solves the hidden state problem and provides a suitable representation for applying reinforcement learning in continuous space for action selection.  ...  Millán, and S. Hug for their contributions.  ... 
doi:10.1109/tnn.2004.826221 pmid:15384552 fatcat:td5uro3g55aq5ndumiq3vbk2ii

Covering Minkowski sum boundary using points with applications

Jyh-Ming Lien
2008 Computer Aided Geometric Design  
Minkowski sum is a fundamental operation in many geometric applications, including robotic motion planning, penetration depth estimation, solid modeling, and virtual prototyping.  ...  We show several applications in motion planning, penetration depth approximation and geometric modeling. An implementation of the proposed method can be obtained from our project webpage.  ...  The "David" and the "Dragon" models are obtained from the Stanford 3D Scanning Repository. The author also thanks anonymous reviewers for their valuable comments.  ... 
doi:10.1016/j.cagd.2008.06.006 fatcat:uww7wdal7rg5hivbuywufhafnq
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