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Sparse Surface Constraints for Combining Physics-based Elasticity Simulation and Correspondence-Free Object Reconstruction [article]

Sebastian Weiss, Robert Maier, Rüdiger Westermann, Daniel Cremers, Nils Thuerey
2019 arXiv   pre-print
This formulation matches correspondence-free, sparse observations from a single-view depth sequence with a finite element simulation of deformable bodies.  ...  We address the problem to infer physical material parameters and boundary conditions from the observed motion of a homogeneous deformable object via the solution of an inverse problem.  ... Sparse Surface Constraints for Combining.  ... 
arXiv:1910.01812v1 fatcat:ikvsjvbfm5ciljah3qjmgdugdu

Learning Elastic Constitutive Material and Damping Models [article]

Bin Wang, Yuanmin Deng, Paul Kry, Uri Ascher, Hui Huang, Baoquan Chen
2020 arXiv   pre-print
Furthermore, a patch based position constraint is proposed to tackle the challenge of handling incomplete and noisy observations arising in real-world examples.  ...  The key idea is to iteratively improve a correction to a nominal model of the elastic and damping properties of the object, which allows new forward simulations with the learned correction to more accurately  ...  Bend (left) and twist (right) deformation trajectories of fine mesh are used as training data, and the purple bars are the reconstruction results after learning.  ... 
arXiv:1909.01875v2 fatcat:645hdb2vsvdwbb3jiuc2pcx2si

Recent Developments in Skin Deformation for Character Animation

Shaojun Bian, Lihua You, Jian J. Zhang
2015 Proceedings of the 10th International Conference on Computer Graphics Theory and Applications  
In this paper, we survey the recent literature on skin deformation according to three types of approaches: purely geometric, physics-based, and data driven.  ...  We review the problems they primarily tackles, the methodologies they applies, and the advantages and disadvantages they have. At last, we discuss directions for future research.  ...  Sparse Meshless Model Physics-based methods consider the physics principles of skin and the material attributes.  ... 
doi:10.5220/0005272001220129 dblp:conf/grapp/BianYZ15 fatcat:hcyh5bt2rzd5bdy7gwcoozb2hm

Reconstruction of Cell Focal Adhesions using Physical Constraints and Compressive Regularization

Joshua C. Chang, Yanli Liu, Tom Chou
2017 Biophysical Journal  
By minimizing the objective function subject to a number of important physically motivated constraints, we are able to efficiently reconstruct stress fields with localized structure from simulated and  ...  Our method incorporates the exact solution for the stress tensor accurate to first-order finite-differences and motivates the use of distance-based cut-offs for data inclusion and problem sparsification  ...  Popescu for sharing their preliminary data on cell-induced substrate deformation measured using Hilbert phase dynamometry.  ... 
doi:10.1016/j.bpj.2017.09.021 pmid:29212006 pmcid:PMC5738527 fatcat:cq2l7yl52zacroiata2657unue

Model-based human shape reconstruction from multiple views

Jonathan Starck, Adrian Hilton
2008 Computer Vision and Image Understanding  
Image-based modelling allows the reconstruction of highly realistic digital models from real-world objects.  ...  The framework is compared to physics-based deformable surface fitting at a single resolution, demonstrating an improved reconstruction accuracy against ground truth data with a reduced model distortion  ...  Object-centred scene reconstruction An object-centred approach to scene reconstruction was introduced by Fua and Leclerc [14, 15] to combine multiple visual cues in reconstruction using an initial surface  ... 
doi:10.1016/j.cviu.2007.10.001 fatcat:fqugvlvplzfblph6dmoto5qeya

Physically-Based Deformations Constrained in Displacements and Volume

E. Promayon, P. Baconnier, C. Puech
1996 Computer graphics forum (Print)  
This paper presents a method of constraining physically-based deformable objects.  ...  In this method, an object can be defined locally in terms of kinetic and dynamic (mass, position, speed), and physical parameters (compressibility, elasticity, motor functioning) .  ...  Related work Physically-based models are well suited to simulate natural motion and flexible elastic objects ([Ter87] [Ter89] ).  ... 
doi:10.1111/1467-8659.1530155 fatcat:xz4qqkp7mvd37clap7ugrpkx6u

Virtual Elastic Objects [article]

Hsiao-yu Chen and Edgar Tretschk and Tuur Stuyck and Petr Kadlecek and Ladislav Kavan and Etienne Vouga and Christoph Lassner
2022 arXiv   pre-print
Building on recent advances in model-free, dynamic Neural Radiance Fields, we reconstruct the objects and corresponding deformation fields.  ...  Achieving this presents multiple challenges: not only do objects have to be captured including the physical forces acting on them, then faithfully reconstructed and rendered, but also plausible material  ...  [34] , we adopt a mesh-free, point-based discretization of elasticity to perform forward simulation.  ... 
arXiv:2201.04623v1 fatcat:ifqfyizicja3vdodp5tydqi57q

Deformable haptic model generation through manual exploration

O. Goksel, Seokhee Jeon, M. Harders, G. Szekely
2013 2013 World Haptics Conference (WHC)  
Both the surface geometry and the elastic parametrization of an object are reconstructed from position/force readings during an operator-assisted exploration of the object.  ...  In contrast, elastic modulus reconstruction yields a global model parameterization independent of geometry.  ...  ACKNOWLEDGEMENTS This work is supported by the NCCR Co-Me of the Swiss National Science Foundation and by the EU project BEAMING.  ... 
doi:10.1109/whc.2013.6548466 dblp:conf/haptics/GokselJHS13 fatcat:ljwxfro24vdfzdr6kddztl4mue

Model-Based Identification of Anatomical Boundary Conditions in Living Tissues [chapter]

Igor Peterlik, Hadrien Courtecuisse, Christian Duriez, Stéphane Cotin
2014 Lecture Notes in Computer Science  
Once the equilibrium of the simulation is attained (i.e. the organ registration is computed), the surface forces needed to satisfy the constraints provide a reliable estimation of location, direction and  ...  Using constraint-based finite element simulation, the method registers the two data sets by solving an optimization problem minimizing the energy of the deformable body while satisfying the constraints  ...  Nevertheless, while keeping in mind the patient specific scenario, we would also like to employ an intra-patient evaluation based on atlas, which could provide a base for the BC estimations (e.g. placement  ... 
doi:10.1007/978-3-319-07521-1_21 fatcat:3diu42h55vbxjduclkbyg7e4si

PriMo: Coupled Prisms for Intuitive Surface Modeling [article]

Mario Botsch, Mark Pauly, Markus Gross, Leif Kobbelt
2006 Symposium on geometry processing : [proceedings]. Symposium on Geometry Processing  
We present a new method for 3D shape modeling that achieves intuitive and robust deformations by emulating physically plausible surface behavior inspired by thin shells and plates.  ...  To deform the mesh, prisms are rigidly transformed to satisfy user constraints while minimizing the elastic energy.  ...  Acknowledgments The authors are grateful to Jan Möbius for implementing [LSLCO05] .  ... 
doi:10.2312/sgp/sgp06/011-020 fatcat:74corycp4vg7joozd3cfqq7zyy

Multiresolution green's function methods for interactive simulation of large-scale elastostatic objects

Doug L. James, Dinesh K. Pai
2003 ACM Transactions on Graphics  
This approach makes it feasible to interactively simulate large-scale physical models.  ...  This direct solution approach is suitable for hard real time simulation since it provides a mechanism for gracefully degrading to coarser resolution approximations, and the wavelet representations allow  ...  springs, and as such they are useful modeling primitives for physically-based simulations.  ... 
doi:10.1145/588272.588278 fatcat:afwiecc4evg7vaj3mlnimg4a3u

A unified treatment of elastostatic contact simulation for real time haptics

Doug L. James, Dinesh K. Pai
2005 ACM SIGGRAPH 2005 Courses on - SIGGRAPH '05  
We describe real-time, physically-based simulation algorithms for haptic interaction with elastic objects.  ...  Simulation of contact with elastic objects has been a challenge, due to the complexity of physically accurate simulation and the difficulty of constructing useful approximations suitable for real time  ...  Linear Elastostatic Boundary Model Preliminaries Linear elastostatic objects are essentially three-dimensional linear springs, and as such they are useful modeling primitives for physically-based simulations  ... 
doi:10.1145/1198555.1198614 dblp:conf/siggraph/JamesP05 fatcat:l2hgc3ar2fa3zcbv4e7r77gvji

Embedded thin shells for wrinkle simulation

Olivier Rémillard, Paul G. Kry
2013 ACM Transactions on Graphics  
We combine high resolution thin shells with coarse finite element lattices and define frequency based constraints that allow the formation of wrinkles with properties matching those predicted by the physical  ...  We present a new technique for simulating high resolution surface wrinkling deformations of composite objects consisting of a soft interior and a harder skin.  ...  We thank Sheldon Andrews for collision detection code, and Eitan Grinspun for early discussions at the Bellairs Research Institute.  ... 
doi:10.1145/2461912.2462018 fatcat:jc46dgelgnai3bs56j2zeq44ru

Deformation capture and modeling of soft objects

Bin Wang, Longhua Wu, KangKang Yin, Uri Ascher, Libin Liu, Hui Huang
2015 ACM Transactions on Graphics  
We adopt an iterative framework that consists of one component for physics-based deformation tracking and another for spacetime optimization of deformation parameters.  ...  the static shape for soft objects.  ...  Acknowledgements We thank the anonymous reviewers for their constructive comments. We are grateful to the authors of [Chen et al. 2014  ... 
doi:10.1145/2766911 fatcat:jh36tec37nbidbhwsvvphpjtyu

Template-Based Monocular 3D Recovery of Elastic Shapes Using Lagrangian Multipliers

Nazim Haouchine, Stephane Cotin
2017 2017 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)  
We present in this paper an efficient template-based method for 3D recovery of elastic shapes from a fixed monocular camera.  ...  Comparisons with existing techniques are conducted on synthetic and real elastic objects with strains ranging from 25% to 130% resulting to low errors.  ...  In a similar context, non-linear elasticity has been considered in [8] , for the reconstruction of highly elastic objects.  ... 
doi:10.1109/cvpr.2017.381 dblp:conf/cvpr/HaouchineC17 fatcat:msrjttoc65emnaqvjagjzbd4gq
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