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Visualization and Computer Graphics, IEEE Transactions on

Issue 6 • Date June 2013

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Displaying Results 1 - 15 of 15
  • Editor's Note

    Publication Year: 2013 , Page(s): 897
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    Freely Available from IEEE
  • Guest Editors' Introduction: Special Section on the IEEE Pacific Visualization Symposium 2012

    Publication Year: 2013 , Page(s): 898 - 899
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    Freely Available from IEEE
  • Visual Analysis of Cardiac 4D MRI Blood Flow Using Line Predicates

    Publication Year: 2013 , Page(s): 900 - 912
    Cited by:  Papers (2)
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1030 KB)  

    Four-dimensional MRI is an in vivo flow imaging modality that is expected to significantly enhance the understanding of cardiovascular diseases. Among other fields, 4D MRI provides valuable data for the research of cardiac blood flow and with that the development, diagnosis, and treatment of various cardiac pathologies. However, to gain insights from larger research studies or to apply 4D MRI in t... View full abstract»

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  • Ambient Occlusion Effects for Combined Volumes and Tubular Geometry

    Publication Year: 2013 , Page(s): 913 - 926
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4885 KB)  

    This paper details a method for interactive direct volume rendering that computes ambient occlusion effects for visualizations that combine both volumetric and geometric primitives, specifically tube-shaped geometric objects representing streamlines, magnetic field lines or DTI fiber tracts. The algorithm extends the recently presented the directional occlusion shading model to allow the rendering... View full abstract»

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  • A Maxent-Stress Model for Graph Layout

    Publication Year: 2013 , Page(s): 927 - 940
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2852 KB) |  | HTML iconHTML  

    In some applications of graph visualization, input edges have associated target lengths. Dealing with these lengths is a challenge, especially for large graphs. Stress models are often employed in this situation. However, the traditional full stress model is not scalable due to its reliance on an initial all-pairs shortest path calculation. A number of fast approximation algorithms have been propo... View full abstract»

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  • A Divide-and-Conquer Approach to Quad Remeshing

    Publication Year: 2013 , Page(s): 941 - 952
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    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4285 KB) |  | HTML iconHTML  

    Many natural and man-made objects consist of simple primitives, similar components, and various symmetry structures. This paper presents a divide-and-conquer quadrangulation approach that exploits such global structural information. Given a model represented in triangular mesh, we first segment it into a set of submeshes, and compare them with some predefined quad mesh templates. For the submeshes... View full abstract»

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  • CiSE: A Circular Spring Embedder Layout Algorithm

    Publication Year: 2013 , Page(s): 953 - 966
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1571 KB)  

    We present a new algorithm for automatic layout of clustered graphs using a circular style. The algorithm tries to determine optimal location and orientation of individual clusters intrinsically within a modified spring embedder. Heuristics such as reversal of the order of nodes in a cluster and swap of neighboring node pairs in the same cluster are employed intermittently to further relax the spr... View full abstract»

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  • Depth-Fighting Aware Methods for Multifragment Rendering

    Publication Year: 2013 , Page(s): 967 - 977
    Cited by:  Papers (1)
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2669 KB)  

    Many applications require operations on multiple fragments that result from ray casting at the same pixel location. To this end, several approaches have been introduced that process for each pixel one or more fragments per rendering pass, so as to produce a multifragment effect. However, multifragment rasterization is susceptible to flickering artifacts when two or more visible fragments of the sc... View full abstract»

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  • Interactive Visualizations of Blowups of the Plane

    Publication Year: 2013 , Page(s): 978 - 990
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3881 KB) |  | HTML iconHTML  

    Blowups are an important technique in algebraic geometry that permit the smoothing of singular algebraic varieties. It is a challenge to visualize this process even in the case of blowups of points X in the affine plane AA2IR. First results were obtained by Brodmann with the aid of the so-called toroidal blowup, a compact embedding of the blowup into affine 3-space. In fact, ... View full abstract»

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  • Interpenetration Free Simulation of Thin Shell Rigid Bodies

    Publication Year: 2013 , Page(s): 991 - 1004
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1107 KB)  

    We propose a new algorithm for rigid body simulation that guarantees each body is in an interpenetration free state, both increasing the accuracy and robustness of the simulation as well as alleviating the need for ad hoc methods to separate bodies for subsequent simulation and rendering. We cleanly separate collision and contact resolution such that objects move and collide in the first step, wit... View full abstract»

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  • Multiverse Data-Flow Control

    Publication Year: 2013 , Page(s): 1005 - 1019
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4007 KB)  

    In this paper, we present a data-flow system which supports comparative analysis of time-dependent data and interactive simulation steering. The system creates data on-the-fly to allow for the exploration of different parameters and the investigation of multiple scenarios. Existing data-flow architectures provide no generic approach to handle modules that perform complex temporal processing such a... View full abstract»

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  • Physically-Based Feature Tracking for CFD Data

    Publication Year: 2013 , Page(s): 1020 - 1033
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1434 KB)  

    Numerical simulations of turbulent fluid flow in areas ranging from solar physics to aircraft design are dominated by the presence of repeating patterns known as coherent structures. These persistent features are not yet well understood, but are believed to play an important role in the dynamics of turbulent fluid motion, and are the subject of study across numerous scientific and engineering disc... View full abstract»

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  • PIWI: Visually Exploring Graphs Based on Their Community Structure

    Publication Year: 2013 , Page(s): 1034 - 1047
    Cited by:  Papers (1)
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2942 KB)  

    Community structure is an important characteristic of many real networks, which shows high concentrations of edges within special groups of vertices and low concentrations between these groups. Community related graph analysis, such as discovering relationships among communities, identifying attribute-structure relationships, and selecting a large number of vertices with desired structural feature... View full abstract»

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  • Understanding Visualization: A Formal Approach Using Category Theory and Semiotics

    Publication Year: 2013 , Page(s): 1048 - 1061
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1578 KB) |  | HTML iconHTML  

    This paper combines the vocabulary of semiotics and category theory to provide a formal analysis of visualization. It shows how familiar processes of visualization fit the semiotic frameworks of both Saussure and Peirce, and extends these structures using the tools of category theory to provide a general framework for understanding visualization in practice, including: Relationships between system... View full abstract»

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  • Visual Analysis and Steering of Flooding Simulations

    Publication Year: 2013 , Page(s): 1062 - 1075
    Cited by:  Papers (3)
    Multimedia
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2961 KB)  

    We present a visualization tool for the real-time analysis of interactively steered ensemble-simulation runs, and apply it to flooding simulations. Simulations are performed on-the-fly, generating large quantities of data. The user wants to make sense of the data as it is created. The tool facilitates understanding of what happens in all scenarios, where important events occur, and how simulation ... View full abstract»

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Aims & Scope

Visualization techniques and methodologies; visualization systems and software; volume visualization; flow visualization; multivariate visualization; modeling and surfaces; rendering; animation; user interfaces; visual progranuning; applications.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Leila De Floriani
Department of Computer Science, Bioengineering, Robotics and Systems Engineering
University of Genova
16146 Genova (Italy)
ldf4tvcg@umiacs.umd.edu