Filters








19,824 Hits in 3.6 sec

Implicit Digital Surfaces in Arbitrary Dimensions [chapter]

Jean-Luc Toutant, Eric Andres, Gaelle Largeteau-Skapin, Rita Zrour
2014 Lecture Notes in Computer Science  
In this paper we introduce a notion of digital implicit surface in arbitrary dimensions.  ...  The digital implicit surface is the result of a morphology inspired digitization of an implicit surface {x ∈ R n : f (x) = 0} which is the boundary of a given closed subset of R n , {x ∈ R n : f (x) ≤  ...  In this paper we address the problem of defining a digital implicit equivalent to an implicit surface in arbitrary dimensions.  ... 
doi:10.1007/978-3-319-09955-2_28 fatcat:ml2ssok3izdgvdjr6mpohbojp4

PIFu: Pixel-Aligned Implicit Function for High-Resolution Clothed Human Digitization [article]

Shunsuke Saito, Zeng Huang, Ryota Natsume, Shigeo Morishima, Angjoo Kanazawa, Hao Li
2019 arXiv   pre-print
In particular, it is memory efficient unlike the voxel representation, can handle arbitrary topology, and the resulting surface is spatially aligned with the input image.  ...  Highly intricate shapes, such as hairstyles, clothing, as well as their variations and deformations can be digitized in a unified way.  ...  This implicit surface representation is suitable for detailed objects with arbitrary topology.  ... 
arXiv:1905.05172v3 fatcat:aq7mo4wt6nea5cpka24azjswba

Page 249 of Journal of the Aerospace Sciences Vol. 22, Issue 4 [page]

1955 Journal of the Aerospace Sciences  
Both the stepwise and implicit procedures are suitable for programing on digital computers Several original solutions are obtained by these methods, in- juding the important problems of the boundary laver  ...  over a flat plate with an arbitrary distribution of suction and the slot- jet issuing adjacent to a piate into a moving stream List OF SYMBOLS = characteristic dimension = subscript denoting jth column  ... 

Digital Surfaces of Revolution Made Simple [chapter]

Eric Andres, Gaelle Largeteau-Skapin
2016 Lecture Notes in Computer Science  
In this paper we present a new, simple, method for creating digital 3D surfaces of revolution. One can choose the topology of the surface that may have 0, 1 or no tunnels.  ...  The denition we propose is not limited to circles as curves of revolution but can be extended to any type of implicit curves.  ...  We showed that it is possible to analytically dene digital implicit surfaces in dimension n with controlled topology.  ... 
doi:10.1007/978-3-319-32360-2_19 fatcat:625ikaaniva2znz766p45snkdy

Learning to Infer Implicit Surfaces without 3D Supervision [article]

Shichen Liu, Shunsuke Saito, Weikai Chen, Hao Li
2019 arXiv   pre-print
In particular, sampling implicit surfaces densely is also known to be a computationally demanding and very slow operation.  ...  We address the fundamental problem of learning implicit surfaces for shape inference without the need of 3D supervision.  ...  topologies (a), implicit surfaces handle arbitrary topologies with high resolutions in a memory efficient manner (b).  ... 
arXiv:1911.00767v1 fatcat:vq33mtgfvvc7llzkigbvpljo4i

Geometric fusion for a hand-held 3D sensor

Adrian Hilton, John Illingworth
2000 Machine Vision and Applications  
The new geometric fusion algorithm is based on the normal-volume representation of a triangle which enables incremental transformation of an arbitrary mesh into an implicit volumetric field function.This  ...  This article presents a geometric fusion algorithm developed for the reconstruction of 3D surface models from hand-held sensor data.  ...  An arbitrary topology closed manifold surface # can be represented in implicit form as an iso-surface of a spatial field function, $ & % ' © ) ( , where © 0 £ 2 $ & % ' © ) ( R £ S G .  ... 
doi:10.1007/s001380050123 fatcat:m3n23yauhngtri6bn45u4j74sq

Proxemic interaction

Till Ballendat, Nicolai Marquardt, Saul Greenberg
2010 ACM International Conference on Interactive Tabletops and Surfaces - ITS '10  
In particular, we show how proxemics can: regulate implicit and explicit interaction; trigger such interactions by continuous movement or by movement of people and devices in and out of discrete proxemic  ...  What is surprising is how little proxemics are used to mediate people's interactions with surrounding digital devices.  ...  ACKNOWLEDGMENTS Partially funded by the iCORE/NSERC/SMART Chair in Interactive Technologies, Alberta Innovates Technology Futures, NSERC, and SMART Technologies Inc.  ... 
doi:10.1145/1936652.1936676 dblp:conf/tabletop/BallendatMG10 fatcat:uhtwqdwjonef7m6yhade7rdgt4

Controlled Metamorphosis Between Skeleton-Driven Animated Polyhedral Meshes of Arbitrary Topologies

Denis Kravtsov, Oleg Fryazinov, Valery Adzhiev, Alexander Pasko, Peter Comninos
2013 Computer graphics forum (Print)  
The shape-metamorphosis process is performed in several steps: first we collapse the two meshes to their corresponding approximating implicit surfaces, then we transform between the two implicit surfaces  ...  Given two meshes, animated by their rigging-skeletons, we associate each mesh with its own approximating implicit surface. This implicit surface moves synchronously with the mesh.  ...  These generalised cylinders are defined in R n+1 , where n is the dimension of the source and target objects.  ... 
doi:10.1111/cgf.12254 fatcat:jy65dsdqlncrno65mrpopjq334

Collaborating with an Artist in Digital Geometry [chapter]

Eric Andres, Gaelle Largeteau-Skapin, Aurélie Mourier
2017 Lecture Notes in Computer Science  
In this invited paper, we are going to present an ongoing collaboration with a local artist, Aurélie Mourier.  ...  The artist works with voxel shapes and this led our digital geometry team to develop new shape modeling tools and explore a particular class of unfolding problems.  ...  A recent paper proposed a digitization method for surfaces of revolution [3] based on a very simple and straightforward method for digitizing almost any implicit nD surfaces [16] .  ... 
doi:10.1007/978-3-319-66272-5_3 fatcat:wudb5zmdund3pc6degh6sb4cp4

ARCH: Animatable Reconstruction of Clothed Humans

Zeng Huang, Yuanlu Xu, Christoph Lassner, Hao Li, Tony Tung
2020 2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)  
Detailed surface geometry and appearance are learned using an implicit function representation with spatial local features.  ...  Existing approaches to digitize 3D humans struggle to handle pose variations and recover details. Also, they do not produce models that are animation ready.  ...  In this paper, we incorporate body prior knowledge to transform people in arbitrary poses to the canonical space, and then learn to reconstruct an implicit representation.  ... 
doi:10.1109/cvpr42600.2020.00316 dblp:conf/cvpr/HuangXL0T20 fatcat:pmq4ncbw7bbpnigrgkiclstqqm

Integral Based Curvature Estimators in Digital Geometry [chapter]

David Coeurjolly, Jacques-Olivier Lachaud, Jérémy Levallois
2013 Lecture Notes in Computer Science  
In this paper, we investigate a new class of estimators on digital shape boundaries based on Integral Invariants.  ...  In many geometry processing applications, the estimation of differential geometric quantities such as curvature or normal vector field is an essential step.  ...  We have implemented these Integeral Invariant estimators (II) in the DGtal library [1] whichallows us to have parametric or implicit shape construction in dimension 2 and 3 for multigrid evaluation.  ... 
doi:10.1007/978-3-642-37067-0_19 fatcat:iesmrwatafawplaecu4drpvjfu

ARCH: Animatable Reconstruction of Clothed Humans [article]

Zeng Huang, Yuanlu Xu, Christoph Lassner, Hao Li, Tony Tung
2020 arXiv   pre-print
Detailed surface geometry and appearance are learned using an implicit function representation with spatial local features.  ...  Existing approaches to digitize 3D humans struggle to handle pose variations and recover details. Also, they do not produce models that are animation ready.  ...  In this paper, we incorporate body prior knowledge to transform people in arbitrary poses to the canonical space, and then learn to reconstruct an implicit representation.  ... 
arXiv:2004.04572v2 fatcat:hu5szk3gh5aglnmh2set5o3lwy

Implicit medial representation for vessel segmentation

Guillaume Pizaine, Elsa Angelini, Isabelle Bloch, Sherif Makram-Ebeid, Benoit M. Dawant, David R. Haynor
2011 Medical Imaging 2011: Image Processing  
In the context of mathematical modeling of complex vessel tree structures with deformable models, we present a novel level set formulation to evolve both the vessel surface and its centerline.  ...  The implicit function is computed as the convolution of a geometric primitive, representing the centerline, with localized kernels of continuously-varying scales allowing accurate estimation of the vessel  ...  In nD, the level set framework enables to define manifolds of co-dimension 1 (with one equation), corresponding to closed surfaces in 3D and closed contours in 2D.  ... 
doi:10.1117/12.878048 dblp:conf/miip/PizaineABM11 fatcat:exfkerlgsve6rbyfegtbkcgjry

2D Image Database Indexing: A Coefficient-Based Approach

Xiaoqian Jiang, Wanhong Xu, Yiheng Li, Latanya Sweeney, Ralph Gross, Daniel Yurovsky
2007 Multimedia and Expo, 2007 IEEE International Conference on  
The problem investigated in this paper is the quick identification of free-form 2D objects using a coefficient based indexing technique.  ...  We demonstrate that combining implicit polynomial shape descriptors with calibration techniques has the potential to quickly identify images of similar shapes.  ...  In addition, the algorithm can be easily extended to higher dimension using a voting scheme.  ... 
doi:10.1109/icme.2007.4285124 dblp:conf/icmcs/JiangXLSGY07 fatcat:sxf43kbwqrf4xl6smhqsz4sfem

Implicit Shape Reconstruction of Unorganized Points Using PDE-Based Deformable 3D Manifolds

Elena Franchini, Serena Morigi, Fiorella Sgallari
2010 Numerical Mathematics: Theory, Methods and Applications  
The distance function is computed by implicit local interpolants defined in terms of radial basis functions.  ...  Space discretization of the PDE model is obtained by finite co-volume schemes and semi-implicit approach is used in time/scale.  ...  arbitrary data in three or higher dimensions [14] , [26] , [3] .  ... 
doi:10.4208/nmtma.2010.m9009 fatcat:7ezwfg3s5rbxfmf6zgmdvjnx2e
« Previous Showing results 1 — 15 out of 19,824 results