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2004 International journal of computational geometry and applications  
In Part I, we described an efficient and robust algorithm for computing a common refinement of two surface meshes.  ...  We report experimental results using our enhanced overlay algorithm with feature matching for complex geometries from real-world applications.  ...  Damrong Guoy and Dr. Andreas Haselbacher of CSAR at UIUC and Dr. Ho-lun Cheng at National University of Singapore for providing some of the test meshes.  ... 
doi:10.1142/s0218195904001524 fatcat:22isfheerbhltbxv2ubsgorgxi

Symmetry-Aware Mesh Processing [chapter]

A. Golovinskiy, J. Podolak, T. Funkhouser
2009 Lecture Notes in Computer Science  
These steps can be used to enhance the symmetries of a mesh, to decompose a mesh into its symmetric parts and asymmetric residuals, and to establish correspondences between symmetric mesh features.  ...  symmetric topology).  ...  We are also grateful to several funding agencies that provided partial funding for this work: National Science Foundation Grants IIS-0612231, CCR-0093343, CNS-0406415, and 11S-0121446; Air Force Research  ... 
doi:10.1007/978-3-642-03596-8_10 fatcat:i4uajlygjneqbcw3ncae7kd4p4

Sharp Feature Preservation in Octree-Based Hexahedral Mesh Generation for CAD Assembly Models [chapter]

Jin Qian, Yongjie Zhang
2010 Proceedings of the 19th International Meshing Roundtable  
feature preservation.  ...  An octree-based isocontouring algorithm is then carried out to create unstructured hexahedral meshes, detecting and preserving all the sharp features.  ...  Acknowledgement We would like to thank Wenyan Wang for useful discussions on NURBS curve and surface path parametrization, and Matt Staten for providing the multiaxis, hook2, hook and varco3 models.  ... 
doi:10.1007/978-3-642-15414-0_15 dblp:conf/imr/QianZ10 fatcat:add4ieed3zdzfncqxqyst5oo5u

Robust Surface Reconstruction via Laplace-Beltrami Eigen-Projection and Boundary Deformation

Yonggang Shi, Rongjie Lai, Jonathan H Morra, Ivo Dinov, P M Thompson, Arthur W Toga
2010 IEEE Transactions on Medical Imaging  
In medical shape analysis, a critical problem is reconstructing a smooth surface of correct topology from a binary mask that typically has spurious features due to segmentation artifacts.  ...  Using the metric distortion during the LB eigen-projection, our method automatically detects the location of outliers and feeds this information to a well-composed and topology-preserving deformation.  ...  TABLE I I WELL-COMPOSED AND TOPOLOGY PRESERVING DEFORMATION ALGORITHM 1 TABLE II P II -VALUES OF VOLUME-NORMALIZED MCNL BETWEEN THE MCI  ... 
doi:10.1109/tmi.2010.2057441 pmid:20624704 pmcid:PMC2995840 fatcat:7l5qpmwnh5a6rayejb3gikqcnm

Curved Buildings Reconstruction from Airborne LiDAR Data by Matching and Deforming Geometric Primitives [article]

Jingwei Song, Shaobo Xia, Jun Wang, Dong Chen
2020 arXiv   pre-print
Moreover, we prove that the primitive-based framework significantly reduces the data storage to 10-20 percent of classical mesh models.  ...  After recognizing geometric units (primitives) from building contours, we get initial models by matching basic geometric primitives to these primitives.  ...  After fitting the extracted point cloud [3] , mesh fitting not only preserves the topology, but also a large amount of noise that should be filtered.  ... 
arXiv:2003.09934v1 fatcat:ifntkixaefgt7huecqfc35cmpu

Mesh Generation from Layered Depth Images Using Isosurface Raycasting [chapter]

Steffen Frey, Filip Sadlo, Thomas Ertl
2013 Lecture Notes in Computer Science  
To further improve quality, we also investigate mesh geometry merging and adaptive refinement, both for triangle and quad meshes.  ...  This paper presents an approach for the fast generation of meshes from Layered Depth Images (LDI), a representation that is independent of the underlying data structure and widely used in image-based rendering  ...  Two templates featuring "reference nodes" (dark circles in Fig. 3(d) ) have to match so-called edge nodes inside the mesh.  ... 
doi:10.1007/978-3-642-41939-3_36 fatcat:o3zgwrse2vg6rg5ivemxlcdlmu

Robust deformable image registration using prior shape information for atlas to patient registration

Lotta M. Ellingsen, Gouthami Chintalapani, Russell H. Taylor, Jerry L. Prince
2010 Computerized Medical Imaging and Graphics  
The approach consists of a volumetric deformable registration method augmented to maintain the topology of the atlas mesh after deformation as well as incorporating the dominant three-dimensional shape  ...  Experimental results demonstrate that incorporation of the statistical shape atlas helps to stabilize the registration and improves robustness and registration accuracy.  ...  Acknowledgments This work was supported by NIH/NIBIB grant 5R21EB003616 and NSF EEC9731478. The authors would like to thank Ms. Pauline Pelletier for her assistance on manual processing of data.  ... 
doi:10.1016/j.compmedimag.2009.05.003 pmid:19515532 pmcid:PMC2990688 fatcat:3zo5lk4pczbsnn5ufhwxan6aga

Dense Non-Rigid Motion Estimation in Sequences of 3D Images Using Differential Constraints [chapter]

Serge Benayoun, Chahab Nastar, Nicholas Ayache
1995 Lecture Notes in Computer Science  
The method is energy-minimizing on the space of correspondence functions; the energy is split into two terms, with one term matching differential singularities in the images, and the other constraining  ...  We present experimental results on synthetic data and on medical images and we show how to use these results for analyzing cardiac deformations.  ...  We wish to thank also Isaac Cohen, Alexis Gourdon and Laurent Cohen for helpful discussions. Thanks are also due to Dr.  ... 
doi:10.1007/978-3-540-49197-2_40 fatcat:hmpffpmydncavjnjhpiqer35ta

Dense non-rigid motion estimation in sequences of medical images using differential constraints [chapter]

Serge Benayoun, Nicholas Ayache
1995 Lecture Notes in Computer Science  
The method is energy-minimizing on the space of correspondence functions; the energy is split into two terms, with one term matching differential singularities in the images, and the other constraining  ...  We present experimental results on synthetic data and on medical images and we show how to use these results for analyzing cardiac deformations.  ...  We wish to thank also Isaac Cohen, Alexis Gourdon and Laurent Cohen for helpful discussions. Thanks are also due to Dr.  ... 
doi:10.1007/3-540-60268-2_304 fatcat:vsbs2hysinc3vemkornqj4pjda

A survey of content based 3D shape retrieval methods

Johan W. H. Tangelder, Remco C. Veltkamp
2007 Multimedia tools and applications  
For visualization, 3D shapes are often represented as a surface, in particular polygonal meshes, for example in VRML format.  ...  , (6) robustness, and (7) necessity of pose normalization.  ...  Acknowledgements The figures 2, 4, and 5 are extracted from [30] , [43] , and [76] , respectively.  ... 
doi:10.1007/s11042-007-0181-0 fatcat:qe4qzxqfqrhzrlhz7pdu2lombi

A Delaunay Simplification Algorithm for Vector Fields

Tamal K. Dey, Joshua A. Levine, Rephael Wenger
2007 15th Pacific Conference on Computer Graphics and Applications (PG'07)  
Our aim is to reduce the size of the mesh on which the vector field is defined while preserving topological features of the original vector field.  ...  We provide experimental evidence showing the effectiveness of our technique and its ability to preserve features of both two and three dimensional vector fields.  ...  We are also indebted to Nikos Platis and Theoharis Theoharis for providing us access to their datasets and OpenDX simplification module.  ... 
doi:10.1109/pg.2007.34 dblp:conf/pg/DeyLW07 fatcat:grrpwipuibabjg7wduolusnwfe


Y. Guo, C. Xia, R. Keppens
2016 Astrophysical Journal  
The force-free and divergence-free metrics obtained are comparable to the run with a uniform grid, and the reconstructed field topology is also very similar.  ...  A magneto-frictional module has been implemented and tested in the Message Passing Interface Adaptive Mesh Refinement Versatile Advection Code (MPI-AMRVAC) in the first paper of this series.  ...  and DV i and A i are the cell volume and the cell surface area at position i.  ... 
doi:10.3847/0004-637x/828/2/83 fatcat:inousxg6ojdhrajeua7ufqhnci

Urban 3D semantic modelling using stereo vision

Sunando Sengupta, Eric Greveson, Ali Shahrokni, Philip H. S. Torr
2013 2013 IEEE International Conference on Robotics and Automation  
Such systems also need to recognise their surroundings in order to identify and interact with objects of interest.  ...  Intelligent autonomous systems require accurate 3D reconstructions for applications such as navigation and localisation.  ...  Feature matching: The feature matching comprises of two stages, stereo matching and frame by frame matching.  ... 
doi:10.1109/icra.2013.6630632 dblp:conf/icra/SenguptaGST13 fatcat:fnkmujibxbhkfa2qavaoddmble

HandVoxNet++: 3D Hand Shape and Pose Estimation using Voxel-Based Neural Networks [article]

Jameel Malik and Soshi Shimada and Ahmed Elhayek and Sk Aziz Ali and Christian Theobalt and Vladislav Golyanik and Didier Stricker
2021 arXiv   pre-print
The second representation is the hand surface that preserves the mesh topology.  ...  The first one is the 3D voxelized grid of hand shape, which does not preserve the mesh topology and which is the most accurate representation.  ...  Since the estimated voxelized shape does not preserve the hand mesh topology and the number of vertices, we also estimate hand surface with our voxel-to-surface network.  ... 
arXiv:2107.01205v2 fatcat:lsuarjvtqfbqxlojaglsacqxem

Globally Optimal Surface Mapping for Surfaces with Arbitrary Topology

Xin Li, Yunfan Bao, Xiaohu Guo, Miao Jin, Xianfeng Gu, Hong Qin
2008 IEEE Transactions on Visualization and Computer Graphics  
Computing smooth and optimal one-to-one maps between surfaces of same topology is a fundamental problem in computer graphics and such a method provides us a ubiquitous tool for geometric modeling and data  ...  We design and articulate an automatic variational algorithm that can reach the global distortion minimum for surface mapping between shapes of arbitrary topology, and our algorithm is sorely founded upon  ...  The matching energy, used as their distance, are shown in the table. Since the symmetry of the distance is obviously preserved, we only show the upperright part of the table. IX.  ... 
doi:10.1109/tvcg.2008.32 pmid:18467756 fatcat:5nblgeuprrh2fekvsr4snpseem
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