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ENCYCLOPEDIA WALKABOUTS WITH VISNOMAD A New visualization Tool Designed as an Aid for Textual Exploration

ENCYCLOPEDIA WALKABOUTS WITH VISNOMAD <i>A New Visualization...

2nd Int conference on Imaging theory and applications and 1st Int conference on information visualization theory and applications

作者： Thiebaut, Dominique Owens, Larry Smith Coll Dept Comp Sci Northampton MA 01063 USA Univ Massachusetts Dept Hist Amherst MA 01003 USA

ISBN: (纸本)9789896740276

We present an original visualizer that allows users to travel through the network of pages of an early encyclopedia of computer science. The purpose of this tool is to better understand the relationship between concepts of computer science at an early stage in the development of the field. The visualizer is written in Java, interfaces to a database server, and sports two different graphical representations, a tree and a graph that are logically connected. We present our design goals, our choices of implementations and the challenges encountered.

关键词： visualization Encyclopedia of computer science Prefuse Java Network Tree

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Symmetric Generative Methods and tSNE: A Short Survey 13

Symmetric Generative Methods and tSNE: A Short Survey

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13th International Joint conference on Computer Vision, Imaging and Computer Graphics theory and applications (VISIGRAPP) and International conference on information visualization theory and applications (IVAPP)

作者： Priam, Rodolphe Univ Southampton Univ Rd Southampton SO17 1BJ Hants England

ISBN: (纸本)9789897583063

In data visualization, a family of methods is dedicated to the symmetric numerical matrices which contain the distances or similarities between high-dimensional data vectors. The method t-Distributed Stochastic Neighbor Embedding and its variants lead to competitive nonlinear embeddings which are able to reveal the natural classes. For comparisons, it is surveyed the recent probabilistic and model-based alternative methods from the literature (LargeVis, Glove, Latent Space Position Model, probabilistic Correspondence Analysis, Stochastic Block Model) for nonlinear embedding via low dimensional positions.

关键词： Data visualization Generative Model Latent Variables tSNE Survey

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Exploring Flow Metrics in Dense Geographical Networks 13

Exploring Flow Metrics in Dense Geographical Networks

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作者： Di Donato, Valentino Patrignani, Maurizio Squarcella, Claudio Roma Tre Univ Dept Engn 79 Via Vasca Navale Rome Italy

ISBN: (纸本)9789897583063

We present FLOWMATRIX, a system for the interactive exploration of time-labeled multivariate flows between pairs of geographic locations. FLOWMATRIX offers a coordinated visualization based on the interplay between a geographic map and a matrix that allow to discover trends tied to specific locations while offering an overview of metrics of the flows between all pairs of locations. The input data is clustered following a geographic hierarchy and the user can navigate between different levels of detail. The design of our system privileges the execution of simple tasks like assessing the volume and features of the flows between pairs of locations, enumerating destinations with poor performance, and sorting flow streams based on their volume.

关键词： Geographic visualization Flow visualization Geographical Networks Time Series Data

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Visual GISwaps - An Interactive visualization Framework for Geospatial Decision Making 13

Visual GISwaps - An Interactive Visualization Framework for ...

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作者： Milutinovic, Goran Seipel, Stefan Univ Gavle Fac Engn & Sustainable Dev Gavle Sweden Uppsala Univ Dept Informat Technol Div Visual Informat & Interact Uppsala Sweden

ISBN: (纸本)9789897583063

Different visualization techniques are frequently used in geospatial information systems (GIS) to support geospatial decision making. However, visualization in GIS context is usually limited to the initial phase of the decision-making process, i.e. situation analysis and problem recognition. This is partly due to the choice of methods used in GIS multi-criteria decision-making (GIS-MCDM) that usually deploy some non-interactive approach, leaving the decision maker little or no control over the calculation of overall values for the considered alternatives;the role of visualization is thus reduced to presenting the final results of the computations. The contributions of this paper are twofold. First, we introduce GISwaps, a novel, intuitive interactive method for decision making in geospatial context. The second and main contribution is an interactive visualization of the choice phase of the decision making process. The visualization allows the decision maker to explore the consequences of trade-offs and costs accepted during the iterative decision process, both in terms of the abstract relation between different decision variables and in spatial context.

关键词： GIS Decision Making Interactive visualization GISwaps

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To Paint in Tongues - Interactive, Artistic and Mobile information visualization for Social Media Texts Creativity Enhancement by Painting with Tweets on a Smart Tablet 13

To Paint in Tongues - Interactive, Artistic and Mobile Infor...

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作者： Horst, Robin Stein, Elisabeth Franziska German Res Ctr Artificial Intelligence DFKI Saarbrucken Germany Johannes Gutenberg Univ Mainz Mainz Germany

ISBN: (纸本)9789897583063

A vast amount of thousands of Twitter messages are produced per second. As not only researchers and data professionals are interested in utilizing this data, other people could make use of specific insights. Without the skill to conduct queries with expert systems, tweets must tediously be read entirely in the traditional way. The creativity gets constrained and neglected in this tiring and cognitive demanding process. However these tweets could be a great source for conducting investigations as for example in sociocultural creative research, as writing for lyrics, scripts or even books. Writers could benefit from this huge amount of free accessible information about public opinions on recent topics. In this paper, we introduce a mobile visualization tool and its underlying visualization concept: Paint in Tongues. It can be used in different ways to visualize text-based social media content. Moreover it enables users that are unexperienced at information visualization to easily interact with the data and utilize it. Techniques that even enhance creativity, as doodling and combining different media, are utilized in an interactive visualization process to augment the data analysis for creative and visual oriented people.

关键词： Text visualization Interface and Interaction Techniques for visualization Computer Assisted Creativity Artistic information visualization Computational Art Social Media Twitter Painting with Data

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Designing a Classification for User-authored Annotations in Data visualization 13

Designing a Classification for User-authored Annotations in ...

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作者： Vanhulst, Pierre Evequoz, Florian Tuor, Raphael Lalanne, Denis Univ Fribourg Human IST Inst Blvd Perolles 90 Fribourg Switzerland Univ Appl Sci Western Switzerland Inst Informat Syst HES SO Valais Wallis Technopole 3 Sierre Switzerland

ISBN: (纸本)9789897583063

This article introduces a classification system for user-authored annotations in the domain of data visualization. The classification system was created with a bottom-up approach, starting from actual user-authored annotations. To devise relevant dimensions for this classification, we designed a data analysis web platform displaying four visualizations of a common dataset. Using this tool, 16 analysts recorded over 300 annotations that were used to design a classification system. That classification system was then iteratively evaluated and refined until a high inter-coder agreement was found. Use cases for such a classification includes assessing the expressiveness of visualizations on a common ground, based on the types of annotations that are produced with each visualization.

关键词： Data visualization Collaboration User-authored Annotations Classification

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Efficient computation and visualization of coherent structures in fluid flow applications

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IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2007年第6期13卷 1464-1471页

作者： Garth, Christoph Gerhardt, Florian Tricoche, Xavier Hagen, Hans Univ Kaiserslautern D-67663 Kaiserslautern Germany Univ Calif Davis Inst Data Anal & Visualizat Davis CA 95616 USA Univ Utah SCI Inst Salt Lake City UT 84112 USA Purdue Univ W Lafayette IN 47907 USA

The recently introduced notion of Finite-Time Lyapunov Exponent to characterize Coherent Lagrangian Structures provides a powerful framework for the visualization and analysis of complex technical flows. Its definition is simple and intuitive, and it has a deep theoretical foundation. While the application of this approach seems straightforward in theory, the associated computational cost is essentially prohibitive. Due to the Lagrangian nature of this technique, a huge number of particle paths must be computed to fill the space-time flow domain. In this paper, we propose a novel scheme for the adaptive computation of FTLE fields in two and three dimensions that significantly reduces the number of required particle paths. Furthermore, for three-dimensional flows, we show on several examples that meaningful results can be obtained by restricting the analysis to a well-chosen plane intersecting the flow domain. Finally, we examine some of the visualization aspects of FTLE-based methods and introduce several new variations that help in the analysis of specific aspects of a flow.

关键词： flow visualization feature detection 3D vector field visualization

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visualization OF UNCERTAIN CONTOUR TREES

VISUALIZATION OF UNCERTAIN CONTOUR TREES

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2nd Int conference on Imaging theory and applications and 1st Int conference on information visualization theory and applications

作者： Kraus, Martin Aalborg Univ Dept Architecture Design & Media Technol Niels Jernes Vej 14 DK-9220 Aalborg Denmark

ISBN: (纸本)9789896740276

Contour trees can represent the topology of large volume data sets in a relatively compact, discrete data structure. However, the resulting trees often contain many thousands of nodes;thus, many graph drawing techniques fail to produce satisfactory results. Therefore, several visualization methods were proposed recently for the visualization of contour trees. Unfortunately, none of these techniques is able to handle uncertain contour trees although any uncertainty of the volume data inevitably results in partially uncertain contour trees. In this work, we visualize uncertain contour trees by combining the contour trees of two morphologically filtered versions of a volume data set, which represent the range of uncertainty. These two contour trees are combined and visualized within a single image such that a range of potential contour trees is represented by the resulting visualization. Thus, potentially erroneous topological structures are visually distinguished from more certain structures. Moreover, topological structures can be revealed that are otherwise obscured by data errors. We present and discuss results obtained with a prototypical implementation using well-known volume data sets.

关键词： Uncertainty visualization Graph drawing information visualization Volume visualization Contour tree

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Bifocal Parallel Coordinates Plot for Multivariate Data visualization 13

Bifocal Parallel Coordinates Plot for Multivariate Data Visu...

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作者： Kaur, Gurminder Karki, Bijaya B. Louisiana State Univ Sch Elect Engn & Comp Sci Baton Rouge LA 70803 USA

ISBN: (纸本)9789897583063

visualization of multivariate data using parallel coordinates plot (PCP) becomes overwhelming as the number of dimensions/variables increases beyond one dozen or so. Here we propose bifocal parallel coordinates plot (BPCP) based on the focus + context approach. BPCP splits vertically the overall rendering into the focus and context regions whose sizes can be adjusted to optimize the use of the available space. The focus area maps a few selected dimensions of interest, referred to as priority axes, at sufficiently wide spacing. The remaining dimensions are represented in the context area in a compact way so as to retain useful information and provide the data continuity. The focus display can be further enhanced with various options, such as axes overlays, scatterplot, and nested juxtaposed PCPs. In order to accommodate an arbitrarily large number of dimensions, the context display supports multi-level stacked view, each PCP level mapping a subset of the context axes. With flexible interactivity, BPCP can manage the priority axes and data rendering with respect to the corresponding dimensions to support exploratory visualization while providing useful context on the same visualization display.

关键词： Parallel Coordinates Plot Multivariate Data High Dimensions information visualization Focus plus Context

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TabularVis - A Circos-inspired Interactive Web Client based Tool for Improving the Clarity of Tabular Data visualization 13

TabularVis - A Circos-inspired Interactive Web Client based ...

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作者： Papp, Gyorgy Kunkli, Roland Univ Debrecen Fac Informat Dept Comp Graph & Image Proc Debrecen Hungary

ISBN: (纸本)9789897583063

Table visualization is one of the earliest problems in the field of data visualization, and there are many applications which provide different solutions to this task. One of the most popular ones is Circos, a well-known genome visualization software package based on the so-called circular layout technique. In this work, we present an interactive web-based visualization tool inspired by Circos' table viewer web application, in which we provide new extensions and techniques beyond its existing main ideas, for improving the clarity of the generated visualization. One of them is making the links easier to follow by giving an automatic solution to reduce the number of intersections between the links. We also present different tools which could be particularly useful in such situations, in which the table's data induce extreme scatter, i.e., the difference between the data is significantly large or small. Our proposed visualization accepts tables with non-negative numbers, and the amount of efficiently displayable data depends on the number of zeros in the table. In the paper, besides describing our contributions in detail, we also compare the outputs of our method and Circos table viewer to confirm the legitimacy of our application and the implemented techniques it contains.

关键词： Data visualization Circular Layout Sorting Table Diagram Search Algorithm

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