198 Hits in 5.0 sec

Geometry-Driven Local Neighbourhood Based Predictors for Dynamic Mesh Compression

Libor Váša, Václav Skala
2010 Computer graphics forum (Print)  
In this paper we present two geometric predictors, which are suitable for PCA based compression schemes.  ...  The task of dynamic mesh compression seeks to find a compact representation of a surface animation, while the artifacts introduced by the representation are as small as possible.  ...  This short sequence of connectivity and vertex position data is distributed solely for the purpose of comparison of geometry compression techniques.  ... 
doi:10.1111/j.1467-8659.2010.01659.x fatcat:lwd6vfoiyfbk3hjex5gcq5i7oe

Perceptual Metrics for Static and Dynamic Triangle Meshes

M. Corsini, M. C. Larabi, G. Lavoué, O. Petřík, L. Váša, K. Wang
2013 Computer graphics forum (Print)  
In this review, we discuss the existing comparison metrics for static and dynamic (animated) triangle meshes.  ...  In many cases, such as mesh watermarking, simplification or lossy compression, the objective is to make the change in appearance negligible, or as small as possible, given some other constraints.  ...  for dynamic mesh comparison.  ... 
doi:10.1111/cgf.12001 fatcat:2agsdob2dbbjplyu6bzz73rfgq

Spectral Animation Compression

Chao Wang, Yang Liu, Xiaohu Guo, Zichun Zhong, Binh Le, Zhigang Deng
2015 Journal of Computer Science and Technology  
This paper presents a spectral approach to compress dynamic animation consisting of a sequence of homeomorphic manifold meshes.  ...  Our new approach directly compresses the field of deformation gradient defined on the surface mesh, by decomposing it into rigid-body motion (rotation) and non-rigid-body deformation (stretching) through  ...  [17] and Geometry-Driven Local Neighbourhood Based Predictors [18] .  ... 
doi:10.1007/s11390-015-1544-z fatcat:msm4byyykbfrlb3e5ja4jhzkiu

Rufael Mekuria

2017 ACM SIGMultimedia Records  
It includes a part for compression of the geometry by local differential encoding and a connectivity coder based on coding specific patterns in the mesh connectivity.  ...  The third codec is based on a geometry driven approach.  ...  at the rendering stage with Depth Image-Based Rendering, cf.  ... 
doi:10.1145/3129151.3129159 fatcat:sws54gzf4jaszoq7s43wjlgtju

Compression of 3D mesh sequences by temporal segmentation

Guoliang Luo, Frederic Cordier, Hyewon Seo
2013 Computer Animation and Virtual Worlds  
Further, we perform intracluster compression based on linear coding.  ...  We describe a compression method for three-dimensional animation sequences that has notable advantages over existing techniques.  ...  POSE-SIMILARITY CLUSTERING Our algorithm, instead of looking for coherencies in the local neighbourhood like many others, searches for pose coherence independently from temporal coherency.  ... 
doi:10.1002/cav.1522 fatcat:ukgiwj63m5aubca3dl6tkomvzq

A Survey on Deep Learning for Localization and Mapping: Towards the Age of Spatial Machine Intelligence [article]

Changhao Chen, Bing Wang, Chris Xiaoxuan Lu, Niki Trigoni, Andrew Markham
2020 arXiv   pre-print
Deep learning based localization and mapping has recently attracted significant attention.  ...  Instead of creating hand-designed algorithms through exploitation of physical models or geometric theories, deep learning based solutions provide an alternative to solve the problem in a data-driven way  ...  [185] Yes -0.56/0.66 hybrid scene compression for localization Cheng et al. [186] Yes --cascaded parallel filtering Taira et al.  ... 
arXiv:2006.12567v2 fatcat:snb2byqamfcblauw5lzccb7umy

Computational haemodynamics of small vessels using the Moving Particle Semi-implicit (MPS) method

Alberto M. Gambaruto
2015 Journal of Computational Physics  
The intra-cell interaction is driven by a complex flow field that can be visualised in a Lagrangian framework, and highlights vortex structures in the wakes and in between the cells.  ...  Acknowledgements The author gratefully acknowledged the support of the Japanese Society for the Promotion of Science (JSPS) to visit the Biological Flow Studies Laboratory at Tohoku University, and  ...  In mesh-free methods, function approximation relies on the information available in a local neighbourhood, and is often based on a weighted radial interaction, hence proximity, such that closer neighbouring  ... 
doi:10.1016/ fatcat:unnoj4j72refziokxo7w6eptnq

Space-Time Window Reconstruction In Parallel High Performance Numeric Simulations. Application For Cfd (Phd Thesis)

Alin Anton, Ioan Cretu
2011 Zenodo  
This thesis proposes a new concept for dealing with large-scale, numerical simulation data.  ...  A regular computational fluid dynamics numerical simulation, is always shifted in time, and sometimes even in space.  ...  For very complex geometries, the algorithm can be extended, in order to include multiple layers within the neighbourhood.  ... 
doi:10.5281/zenodo.15938 fatcat:xh4i6ig7qvfkjapq76phiadpje

Numerical Stabilization of the Melt Front for Laser Beam Cutting [chapter]

Torsten Adolph, Willi Schönauer, Markus Niessen, Wolfgang Schulz
2010 Numerical Mathematics and Advanced Applications 2009  
The model is based on Navier-Stokes equations for viscous incompressible flow and convection-diffusion equation describing pollution transport.  ...  The order of accuracy is measured locally to see its appropriate size.  ...  Recent advances on eigenvalue localization Algebraic Multigrid Preconditioners for a Reaction-Diffusion System of Equations in Electrocardiology Mesh adaptation driven by a metric-based optimization  ... 
doi:10.1007/978-3-642-11795-4_6 fatcat:nx4nvuxaxfbcdjknopny53ck5e

The energetic implications of the time discretization in implementations of the A.L.E. equations

S. J. Childs
2000 International Journal for Numerical Methods in Fluids  
The main conclusions are drawn on in the simulation of a driven cavity flow, a driven cavity flow with various, included rigid bodies, a die-swell problem, and a Stokes second order wave.  ...  It is significant that many algorithms presently in use do not automatically inherit the fundamental qualitative features of the dynamics.  ...  In this test part of the mesh was successively compressed and decompressed by 5 % over two time steps of length 0.05.  ... 
doi:10.1002/(sici)1097-0363(20000430)32:8<979::aid-fld996>;2-2 fatcat:t3dvfb3jf5dghldvbogpyszvwm

The mathematics of finite elements and applications

1989 International Journal of Engineering Science  
For an error estimation, use is made of a new approach which is based on the work of Ainsworth, Wu and the author.  ...  and plasticity problems, and incompressible and compressible fluid flow.  ...  Initially circular delamination fronts may under compressive loading (so-called buckling-driven delamination) form "worm*-like shapes or "telephone cord"-shapes.  ... 
doi:10.1016/0020-7225(89)90012-8 fatcat:z6hknn325re4tbssbqqzmcketa

Finite element setting for fluid flow simulations with natural enforcement of capillary effects [article]

Julien Bruchon, Yujie Liu, Nicolas Moulin
2017 arXiv   pre-print
Our methodology can simulate capillary-driven flows in 2D and 3D with the desired precision: droplet spreading, droplet coalescence, capillary rise.  ...  The moving interface is captured by a Level-Set methodology, combined with a mesh adaptation technique with respect to both pressure and level-set fields.  ...  Acknowledgement The authors wish to thank Chris Yukna for his help in proofreading. [1] P. G. de Gennes, Wetting: statics and dynamics, Reviews of Modern Physics 57 (3) (1985) 827-863.  ... 
arXiv:1711.09722v1 fatcat:jqzurpyjtbbrbpzzdppjmkwnay

Implicit mesh discontinuous Galerkin methods and interfacial gauge methods for high-order accurate interface dynamics, with applications to surface tension dynamics, rigid body fluid–structure interaction, and free surface flow: Part I

Robert Saye
2017 Journal of Computational Physics  
Implicit mesh discontinuous Galerkin methods and interfacial gauge methods for high-order accurate interface dynamics, with applications to surface tension dynamics, rigid body fluid-structure interaction  ...  interface dynamics, facilitating precise computation of interfacial fluid flow in evolving geometries.  ...  Acknowledgements I thank Per-Olof Persson for many interesting discussions regarding the design of discontinuous Galerkin methods, and in particular, for initially pointing out that among a variety of  ... 
doi:10.1016/ fatcat:anzxnxl5yncvbo7gcpul5gpxea

Geometric Deep Learning: Grids, Groups, Graphs, Geodesics, and Gauges [article]

Michael M. Bronstein, Joan Bruna, Taco Cohen, Petar Veličković
2021 arXiv   pre-print
each task, and second, learning by local gradient-descent type methods, typically implemented as backpropagation.  ...  learning is built from two simple algorithmic principles: first, the notion of representation or feature learning, whereby adapted, often hierarchical, features capture the appropriate notion of regularity for  ...  We hope that our perspective will make it easier both for newcomers and practitioners to navigate the field, and for researchers to synthesise novel architectures, as instances of our blueprint.  ... 
arXiv:2104.13478v2 fatcat:odbzfsau6bbwbhulc233cfsrom

A review of techniques, advances and outstanding issues in numerical modelling for rock mechanics and rock engineering

L. Jing
2003 International Journal of Rock Mechanics And Mining Sciences  
Such modelling is essential for studying the fundamental processes occurring in rocks and for rock engineering design.  ...  The purpose of this review paper is to present the techniques, advances, problems and likely future developments in numerical modelling for rock mechanics.  ...  Zimmerman for their comments, suggestions, corrections and especially encouragement in their reviews of this paper. Special thanks to Professor J.A.  ... 
doi:10.1016/s1365-1609(03)00013-3 fatcat:fjbcyvbyobhflawsaajzav27ym
« Previous Showing results 1 — 15 out of 198 results