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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

BMC NEUROscience 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Visual Models and Ontologies 14

Visual Models and Ontologies

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graphics Interface Conference

作者： Eugene Fiume Dynamic Graphics Project Department of Computer Science University of Toronto

ISBN: (纸本)9781482260038

Realistic computer graphics will change the way people think and communicate. Achieving deeper success as a ubiquitous medium will require a more resonant understanding of visual modelling that must embrace mathematical, philosophical, cultural, perceptual and social aspects. With an interleaved understanding, people will be able to create visual ontologies that better align to their expressive needs. In turn, this will naturally lead to ubiquitous supporting technologies. First we need good visual models. A model induces an ontology of things that inevitably omits aspects of the phenomenon, whether desired or not. Thus modelling a model's incompleteness is crucial, for it allows us to account for artifacts, errors, and ontological surprises such as the "uncanny valley". Over the years, my choice of tools to model models has been mathematics. In this paper, I will speak to how little progress we have made and how much broader our investigation must be.

关键词： Ontology Visualization computer graphics mathematics

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Concepture: A regular language based framework for recognizing gestures with varying and repetitive patterns

Concepture: A regular language based framework for recognizi...

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Sketch-Based Interfaces and Modeling 2012

作者： Donmez, N. Singh, K. Dept. of Computer Science University of Toronto Canada Dynamic Graphics Project University of Toronto Canada

ISBN: (纸本)9783905674422

We present Concepture, a framework based on regular language grammars for the authoring and recognition of sketched gestures with infinitely varying and repetitive patterns. Such gestures, while often seen in gesture based applications are currently hard-coded and not customizable. We endorse an example-based workflow, where users author gestures by sketching one or more example instances of the gesture. We de-construct these examples into perceptible stroke segments. Adjacent segment-pairs further capture local spatial relationships between segments and these segment-pairs form the alphabet of a regular language. We then initialize a grammar for our gesture by admitting strings that represent the user provided examples. Grammar refinement is user-friendly, in that we automatically generate new candidate gestures that are visually presented to the user for verification as instances of the gesture. We show Concepture to be effective in efficiently authoring a number of common, yet difficult to recognize gestures, and illustrate it using clip-art and image annotation applications. © 2012 The Eurographics Association.

关键词： Formal languages

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On the effective dimension of light transport

On the effective dimension of light transport

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作者： Lessig, Christian Fiume, Eugene Dynamic Graphics Project Department of Computer Science University of Toronto Canada

Light transport is often characterized within a high-dimensional space although practitioners have long known that it commonly behaves as a much lower-dimensional phenomenon. We study the effective dimension of light transport over a neighborhood on the scene manifold and show that under plausible assumptions the dimensionality is characterized by the spectrum of the spatio-spectral concentration problem. This allows us to improve existing estimates for the dimension in computer graphics using a more insightful derivation and for the first time we obtain optimal representations. The relevance of our results for existing rendering applications is discussed. © 2010 The Eurographics Association and Blackwell Publishing Ltd.

关键词： computer graphics

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Exploring the Effects of Environment Density and Target Visibility on Object Selection in 3D Virtual Environments

Exploring the Effects of Environment Density and Target Visi...

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IEEE Symposium on 3D User Interfaces (3DUI)

作者： Lode Vanacken Tovi Grossman Karin Coninx Expertise Centre for Digital Media and transnationale Hasselt University Diepenbeek Belgium Dynamic Graphics Project Department of Computer Science University of Toronto Canada

Object selection is a primary interaction technique which must be supported by any interactive three-dimensional virtual reality application. Although numerous techniques exist, few have been designed to support the selection of objects in dense target environments, or the selection of objects which are occluded from the user's viewpoint. There is, thus, a limited understanding on how these important factors will affect selection performance. In this paper, we present a set of design guidelines and strategies to aid the development of selection techniques which can compensate for environment density and target visibility. Based on these guidelines, we present two techniques, the depth ray and the 3D bubble cursor, both augmented to allow for the selection of fully occluded targets. In a formal experiment, we evaluate the relative performance of these techniques, varying both the environment density and target visibility. The results found that both of these techniques outperformed a baseline point cursor technique, with the depth ray performing best overall.

关键词： Virtual environment Virtual reality Layout Three dimensional displays Liquid crystal displays computer graphics Guidelines computer displays Casting Switches

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Extraction and remeshing of ellipsoidal representations from mesh data

Extraction and remeshing of ellipsoidal representations from...

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Proceedings - graphics Interface 2005

作者： Simari, Patricio D. Singh, Karan Dynamic Graphics Project Department of Computer Science University of Toronto

Dense 3D polygon meshes are now a pervasive product of various modelling and scanning processes that need to be subsequently processed and structured appropriately for various applications. In this paper we address the restructuring of dense polygon meshes using their segmentation based on a number of ellipsoidal regions. We present a simple segmentation algorithm where connected components of a mesh are fit to ellipsoidal surface regions. The segmentation of a mesh into a small number of ellipsoidal elements makes for a compact geometric representation and facilitates efficient geometric queries and transformations. We also contrast and compare two polygon remeshing techniques based on the ellipsoidal surfaces and the segmentation boundaries.

关键词： Information retrieval

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Proposal and evaluation of clustering method for loci of HRTFs in an orthogonal basis space

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Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers 2002年第11期56卷 1759-1768页

作者： Yamamoto, Ken-Ichiro Mochizuki, Kenji Naemura, Takeshi Saito, Takahiro Harashima, Hiroshi Department of Info. and Commun. Eng. University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Multi-media Ambiance Commun. Project TAO 1-33-16 Hakusan Bunkyo-ku Tokyo 113-0001 Japan Graphics Lab. Stanford University Gates Computer Science Build. 3B-390 Stanford CA 94305-9035 United States Faculty of Engineering Kanagawa University 3-27-1 Rokkakubashi Kanagawa-ku Yokohama 221-8686 Japan

The head related transfer function (HRTF) method of providing spatial sound images has not been capable of dealing with individual differences between human listeners yet. The HRTF varies from person to person and with the direction of the sound source. We focus on this directional variation of the individual HRTF. Principal component analysis is applied to draw the loci of the variation in an orthogonal basis space. Each locus corresponds to a single individual HRTF, and the loci are utilized for clustering the individual HRTF. Some typical ones can be extracted from clusters;we show that they are useful in compensating for the individual differences found in HRTFs.

关键词： Acoustics

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Tunneling for triangle strips in continuous level-of-detail meshes

Tunneling for triangle strips in continuous level-of-detail ...

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Proceedings graphics Interface 2001

作者： Stewart, A. James Dynamic Graphics Project Department of Computer Science University of Toronto Toronto Ont. Canada

This paper describes a method of building and maintaining a good set of triangle strips for both static and continuous level-of-detail (CLOD) meshes. For static meshes, the strips are better than those computed by the classic SGI and STRIPE algorithms. For CLOD meshes, the strips are maintained incrementally as the mesh topology changes. The incremental changes are fast and the number of strips is kept very small.

关键词： computer graphics

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MIT educators share success

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computer graphics (ACM) 2001年第1期35卷 20-23页

作者： Wolfe, Rosalee Belcher, John W. Mark Bessette, R. Massachusetts Institute of Technology Astrophysics Division MIT Physics Department Studio/TEAL Project MIT New England 3D Studio Max Users Group Physics Demonstration Group MIT Department of Physics Center for Space Research Massachusetts Institute of Technology Center for Educational Computing Initiatives Massachusetts Institute of Technology Division of Graphics and Human-Computer Interaction School of Computer Science Telecommunications and Information Systems DePaul University School of Computer Science DePaul University Chicago IL 60604

Professor John Belcher developed a series of short videos with animation and text of selected experiments to properly demonstrate the phenomena of electromagnetism. Such 3D animations are visually compelling, instilling in the student both a sense of wonder about the phenomena and a mental model of why and how it works. The products of these approach includes video clips of demonstrations, 3D animations of these demonstration which display time changing field-lines as a guide to understanding their dynamical effects and Java applets which allow the student to actively construct and animate 2D field lines for varying configurations of sources. These technologies are also implemented to develop animations for Faraday's insights, using video clips.

关键词： computer graphics

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Computing visibility from folded surfaces

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computers and graphics (Pergamon) 1999年第5期23卷 693-702页

作者： Stewart, A. James Dynamic Graphics Project Department of Computer Science University of Toronto Canada M55 3G4

This paper presents an algorithm to estimate what parts of the surrounding environment are visible from each of many sample points on a surface, which may be highly folded and may contain holes. The results can be used to estimate how much of an extended light source is visible from each sample point and, thus, the shading of the surface. Examples are presented of shaded cloth. Unlike shading methods that use a local illumination model, the new method accurately estimates the darkness of deep folds in the cloth. © 1999 Published by Elsevier science Ltd. All rights reserved.

关键词： Cloth Illumination Rendering Shading Visibility

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