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2015 IEEE Pacific Visualization Symposium (PacificVis)

14-17 April 2015

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Displaying Results 1 - 25 of 55
  • [Title page]

    Publication Year: 2015, Page(s): i
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  • [Copyright notice]

    Publication Year: 2015, Page(s): ii
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  • Contents

    Publication Year: 2015, Page(s):iii - v
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  • Sponsors & supporters

    Publication Year: 2015, Page(s): vi
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  • Chair message

    Publication Year: 2015, Page(s): vii
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  • IEEE visualization and graphics technical committee (VGTC)

    Publication Year: 2015, Page(s): viii
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  • Committee

    Publication Year: 2015, Page(s): ix
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  • International program committee

    Publication Year: 2015, Page(s): x
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  • Reviewers

    Publication Year: 2015, Page(s): xi
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  • Keynote speaker

    Publication Year: 2015, Page(s): xii
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  • Keynote speaker

    Publication Year: 2015, Page(s): xiii
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Provides an abstract of the keynote presentation and a brief professional biography of the presenter. The complete presentation was not made available for publication as part of the conference proceedings. View full abstract»

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  • Interactive streamline exploration and manipulation using deformation

    Publication Year: 2015, Page(s):1 - 8
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2682 KB) | HTML iconHTML Multimedia Media

    Occlusion presents a major challenge in visualizing 3D flow fields using streamlines. Displaying too many streamlines creates a dense visualization filled with occluded structures, but displaying too few streams risks losing important features. A more ideal streamline exploration approach is to visually manipulate the cluttered streamlines by pulling visible layers apart and revealing the hidden s... View full abstract»

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  • Moment invariants for 3D flow fields via normalization

    Publication Year: 2015, Page(s):9 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2741 KB) | HTML iconHTML Multimedia Media

    We generalize the framework of moments and introduce a definition of invariants for three-dimensional vector fields. To do so, we use the method of moment normalization that has been shown to be useful in the two dimensions. Using invariant moments, we show how to search for patterns in these fields independent from their position, orientation and scale. From the first order vector moment tensor, ... View full abstract»

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  • Surface flow visualization using the closest point embedding

    Publication Year: 2015, Page(s):17 - 23
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1922 KB) | HTML iconHTML

    In this paper, we introduce a novel flow visualization technique for arbitrary surfaces. This new technique utilizes the closest point embedding to represent the surface, which allows for accurate particle advection on the surface as well as supports the unsteady flow line integral convolution (UFLIC) technique on the surface. This global approach is faster than previous parameterization technique... View full abstract»

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  • Parallel unsteady flow line integral convolution for high-performance dense visualization

    Publication Year: 2015, Page(s):25 - 30
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6234 KB) | HTML iconHTML Multimedia Media

    This paper presents an accurate parallel implementation of unsteady flow line integral convolution (UFLIC) for high-performance visualization of large time-varying flows. Our approach differs from previous implementations by using a novel value scattering+gathering mechanism to parallelize UFLIC and designing a pathline reuse strategy to reduce the computational cost of pathline integration. By ex... View full abstract»

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  • Dendrogramix: A hybrid tree-matrix visualization technique to support interactive exploration of dendrograms

    Publication Year: 2015, Page(s):31 - 38
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (910 KB) | HTML iconHTML Multimedia Media

    Clustering is often a first step when trying to make sense of a large data set. A wide family of cluster analysis algorithms, namely hierarchical clustering algorithms, does not provide a partition of the data set but a hierarchy of clusters organized in a binary tree, known as a dendrogram. The dendrogram has a classical node-link representation used by experts for various tasks like: to decide w... View full abstract»

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  • Attribute-driven edge bundling for general graphs with applications in trail analysis

    Publication Year: 2015, Page(s):39 - 46
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8944 KB) | HTML iconHTML

    Edge bundling methods reduce visual clutter of dense and occluded graphs. However, existing bundling techniques either ignore edge properties such as direction and data attributes, or are otherwise computationally not scalable, which makes them unsuitable for tasks such as exploration of large trajectory datasets. We present a new framework to generate bundled graph layouts according to any numeri... View full abstract»

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  • Interactive visual summary of major communities in a large network

    Publication Year: 2015, Page(s):47 - 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (11578 KB) | HTML iconHTML

    In this paper, we introduce a novel visualization method which allows people to explore, compare and refine the major communities in a large network. We first detect major communities in a network using data mining and community analysis methods. Then, the statistics attributes of each community, the relational strength between communities, and the boundary nodes connecting those communities are c... View full abstract»

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  • Clustered edge routing

    Publication Year: 2015, Page(s):55 - 62
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10020 KB) | HTML iconHTML

    The classic method to depict graphs is a node-link diagram where vertices (nodes) are associated with each object and edges (links) connect related objects. However, node-link diagrams quickly appear cluttered and unclear, even for moderately sized graphs. If the positions of the nodes are fixed then suitable link routing is the only option to reduce clutter. We present a novel link clustering and... View full abstract»

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  • Spherical layout and rendering methods for immersive graph visualization

    Publication Year: 2015, Page(s):63 - 67
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5922 KB) | HTML iconHTML Multimedia Media

    While virtual reality has been researched in many ways for spatial and scientific visualizations, comparatively little has been explored for visualizations of more abstract kinds of data. In particular, stereoscopic and VR environments for graph visualization have only been applied as limited extensions to standard 2D techniques (e.g. using stereoscopy for highlighting). In this work, we explore a... View full abstract»

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  • Laplacian-based dynamic graph visualization

    Publication Year: 2015, Page(s):69 - 73
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1922 KB) | HTML iconHTML

    Visualizing dynamic graphs are challenging due to the difficulty to preserving a coherent mental map of the changing graphs. In this paper, we propose a novel layout algorithm which is capable of maintaining the overall structure of a sequence graphs. Through Laplacian constrained distance embedding, our method works online and maintains the aesthetic of individual graphs and the shape similarity ... View full abstract»

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  • MultiStory: Visual analytics of dynamic multi-relational networks

    Publication Year: 2015, Page(s):75 - 79
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1818 KB) | HTML iconHTML

    Modern-day social networks are often dynamic and multi-relational, however there is currently little being studied on how to incorporate both aspects simultaneously to support visual analytic tasks for such complex social networks. We present a visual analytic framework for dynamic multi-relational networks and a prototype implementation, called the MultiStory system, which includes two new visual... View full abstract»

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  • Variational circular treemaps for interactive visualization of hierarchical data

    Publication Year: 2015, Page(s):81 - 85
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1540 KB) | HTML iconHTML

    Visualization of hierarchical data is of great importance in information visualization. We present variational circular treemaps with a novel layout algorithm by solving disk packing as a continuous optimization problem. Our variational circular treemaps achieve higher space utilization ratio compared with the traditional circular treemaps and support natural interactions as focus+context distorti... View full abstract»

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  • OD-Wheel: Visual design to explore OD patterns of a central region

    Publication Year: 2015, Page(s):87 - 91
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5669 KB) | HTML iconHTML Multimedia Media

    Understanding the Origin-Destination (OD) patterns between different regions of a city is important in urban planning. In this work, based on taxi GPS data, we propose OD-Wheel, a novel visual design and associated analysis tool, to explore OD patterns. Once users define a region, all taxi trips starting from or ending to that region are selected and grouped into OD clusters. With a hybrid circula... View full abstract»

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  • Analyzing delays in trajectories

    Publication Year: 2015, Page(s):93 - 97
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (555 KB) | HTML iconHTML Multimedia Media

    Interactions between trajectories need to be analyzed in various domains to gain insight into movement patterns. Such interactions often take place with some delayed response. We propose an approach to analyze and visualize delayed responses on two trajectories recorded simultaneously and with the same sampling rate. Central to our approach is the computation of a matching between the trajectories... View full abstract»

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