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Title IEEE Transactions on Visualization and Computer Graphics table of contents archive
PublisherIEEE Educational Activities Department Piscataway, NJ, USA
ISSN: 1077-2626

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IEEE Transactions on Visualization and Computer Graphics

Volume 13 Issue 6, November 2007

Table of Contents
IEEE Visualization Conference and IEEE Information Visualization Conference Proceedings 2007 pre-pages
Pages: ii - xxvii
Available formats: Publisher SitePublisher Site
Visual Analysis of Network Traffic for Resource Planning, Interactive Monitoring, and Interpretation of Security Threats
Florian Mansmann, Daniel A. Keim, Stephen C. North, Brian Rexroad, Daniel Sheleheda
Pages: 1105-1112
doi>10.1109/TVCG.2007.70522
Available formats: Publisher SitePublisher Site

The Internet has become a wild place: malicious code is spread on personal computers across the world, deploying botnets ready to attack the network infrastructure. The vast number of security incidents and other anomalies overwhelms attempts at manual ...
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AdaptiviTree: Adaptive Tree Visualization for Tournament-Style Brackets
Desney Tan, Greg Smith, Bongshin Lee, George Robertson
Pages: 1113-1120
doi>10.1109/TVCG.2007.70537
Available formats: Publisher SitePublisher Site

Online pick'em games, such as the recent NCAA college basketball March Madness tournament, form a large and rapidly growing industry. In these games, players make predictions on a tournament bracket that defines which competitors play each other and ...
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ManyEyes: a Site for Visualization at Internet Scale
Fernanda B. Viegas, Martin Wattenberg, Frank van Ham, Jesse Kriss, Matt McKeon
Pages: 1121-1128
doi>10.1109/TVCG.2007.70577
Available formats: Publisher SitePublisher Site

We describe the design and deployment of Many Eyes, a public web site where users may upload data, create interactive visualizations, and carry on discussions. The goal of the site is to support collaboration around visualizations at a large scale by ...
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Scented Widgets: Improving Navigation Cues with Embedded Visualizations
Wesley Willett, Jeffrey Heer, Maneesh Agrawala
Pages: 1129-1136
doi>10.1109/TVCG.2007.70589
Available formats: Publisher SitePublisher Site

This paper presents scented widgets, graphical user interface controls enhanced with embedded visualizations that facilitate navigation in information spaces. We describe design guidelines for adding visual cues to common user interface widgets such ...
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Show Me: Automatic Presentation for Visual Analysis
Jock Mackinlay, Pat Hanrahan, Chris Stolte
Pages: 1137-1144
doi>10.1109/TVCG.2007.70594
Available formats: Publisher SitePublisher Site

This paper describes Show Me, an integrated set of user interface commands and defaults that incorporate automatic presentation into a commercial visual analysis system called Tableau. A key aspect of Tableau is VizQL, a language for specifying views, ...
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Casual Information Visualization: Depictions of Data in Everyday Life
Zachary Pousman, John Stasko, Michael Mateas
Pages: 1145-1152
doi>10.1109/TVCG.2007.70541
Available formats: Publisher SitePublisher Site

Information visualization has often focused on providing deep insight for expert user populations and on techniques for amplifying cognition through complicated interactive visual models. This paper proposes a new subdomain for infovis research that ...
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Geographically Weighted Visualization: Interactive Graphics for Scale-Varying Exploratory Analysis
Jason Dykes, Chris Brunsdon
Pages: 1161-1168
doi>10.1109/TVCG.2007.70558
Available formats: Publisher SitePublisher Site

We introduce a series of geographically weighted (GW) interactive graphics, or geowigs, and use them to explore spatial relationships at a range of scales. We visually encode information about geographic and statistical proximity and variation in novel ...
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Visualizing the History of Living Spaces
Yuri Ivanov, Christopher Wren, Alexander Sorokin, Ishwinder Kaur
Pages: 1153-1160
doi>10.1109/TVCG.2007.70621
Available formats: Publisher SitePublisher Site

The technology available to building designers now makes it possible to monitor buildings on a very large scale. Video cameras and motion sensors are commonplace in practically every office space, and are slowly making their way into living spaces. The ...
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Legible Cities: Focus-Dependent Multi-Resolution Visualization of Urban Relationships
Remco Chang, Ginette Wessel, Robert Kosara, Eric Sauda, William Ribarsky
Pages: 1169-1175
doi>10.1109/TVCG.2007.70574
Available formats: Publisher SitePublisher Site

Numerous systems have been developed to display large collections of data for urban contexts; however, most have focused on layering of single dimensions of data and manual calculations to understand relationships within the urban environment. Furthermore, ...
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Interactive Visual Exploration of a Large Spatio-temporal Dataset: Reflections on a Geovisualization Mashup.
Jo Wood, Jason Dykes, Aidan Slingsby, Keith Clarke
Pages: 1176-1183
doi>10.1109/TVCG.2007.70570
Available formats: Publisher SitePublisher Site

Exploratory visual analysis is useful for the preliminary investigation of large structured, multifaceted spatio-temporaldatasets. This process requires the selection and aggregation of records by time, space and attribute, the ability to transform data ...
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Hotmap: Looking at Geographic Attention
Danyel Fisher
Pages: 1184-1191
doi>10.1109/TVCG.2007.70561
Available formats: Publisher SitePublisher Site

Understanding how people use online maps allows data acquisition teams to concentrate their efforts on the portions of the map that are most seen by users. Online maps represent vast databases, and so it is insufficient to simply look at a list of the ...
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VisLink: Revealing Relationships Amongst Visualizations
Christopher Collins, Sheelagh Carpendale
Pages: 1192-1199
doi>10.1109/TVCG.2007.70521
Available formats: Publisher SitePublisher Site

We present VisLink, a method by which visualizations and the relationships between them can be interactively explored. VisLink readily generalizes to support multiple visualizations, empowers inter-representational queries, and enables the reuse of the ...
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Visualization of Heterogeneous Data
Mike Cammarano, Xin (Luna) Dong, Bryan Chan, Jeff Klingner, Justin Talbot, Alon Halevey, Pat Hanrahan
Pages: 1200-1207
doi>10.1109/TVCG.2007.70617
Available formats: Publisher SitePublisher Site

Both the Resource Description Framework (RDF), used in the semantic web, and Maya Viz u-forms represent data as a graph of objects connected by labeled edges. Existing systems for flexible visualization of this kind of data require manual specification ...
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Sequential Document Visualization
Yi Mao, Joshua Dillon, Guy Lebanon
Pages: 1208-1215
doi>10.1109/TVCG.2007.70592
Available formats: Publisher SitePublisher Site

Documents and other categorical valued time series are often characterized by the frequencies of short range sequential patterns such as n-grams. This representation converts sequential data of varying lengths to high dimensional histogram vectors which ...
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A Taxonomy of Clutter Reduction for Information Visualisation
Geoffrey Ellis, Alan Dix
Pages: 1216-1223
doi>10.1109/TVCG.2007.70535
Available formats: Publisher SitePublisher Site

Information visualisation is about gaining insight into data through a visual representation. This data is often multivariate and increasingly, the datasets are very large. To help us explore all this data, numerous visualisation applications, both commercial ...
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Toward a Deeper Understanding of the Role of Interaction in Information Visualization
Ji Soo Yi, Youn ah Kang, John Stasko, Julie Jacko
Pages: 1224-1231
doi>10.1109/TVCG.2007.70515
Available formats: Publisher SitePublisher Site

Even though interaction is an important part of information visualization (Infovis), it has garnered a relatively low level of attention from the Infovis community. A few frameworks and taxonomies of Infovis interaction techniques exist, but they typically ...
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Interactive Tree Comparison for Co-located Collaborative Information Visualization
Petra Isenberg, Sheelagh Carpendale
Pages: 1232-1239
doi>10.1109/TVCG.2007.70568
Available formats: Publisher SitePublisher Site

In many domains increased collaboration has lead to more innovation by fostering the sharing of knowledge, skills, and ideas. Shared analysis of information visualizations does not only lead to increased information processing power, but team members ...
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Animated Transitions in Statistical Data Graphics
Jeffrey Heer, George Robertson
Pages: 1240-1247
doi>10.1109/TVCG.2007.70539
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In this paper we investigate the effectiveness of animated transitions between common statistical data graphics such as bar charts, pie charts, and scatter plots. We extend theoretical models of data graphics to include such transitions, introducing ...
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Browsing Zoomable Treemaps: Structure-Aware Multi-Scale Navigation Techniques
Renaud Blanch, Eric Lecolinet
Pages: 1248-1253
doi>10.1109/TVCG.2007.70540
Available formats: Publisher SitePublisher Site

Treemaps provide an interesting solution for representing hierarchical data. However, most studies have mainly focused on layout algorithms and paid limited attention to the interaction with treemaps. This makes it difficult to explore large data sets ...
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Visualizing Causal Semantics Using Animations
Nivedita Kadaba, Pourang Irani, Jason Leboe
Pages: 1254-1261
doi>10.1109/TVCG.2007.70528
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Michotte's theory of ampliation suggests that causal relationships are perceived by objects animated under appropriate spatiotemporal conditions. We extend the theory of ampliation and propose that the immediate perception of complex causal relations ...
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Spatialization Design: Comparing Points and Landscapes
Melanie Tory, David Sprague, Fuqu Wu, Wing Yan So, Tamara Munzner
Pages: 1262-1269
doi>10.1109/TVCG.2007.70596
Available formats: Publisher SitePublisher Site

Spatializations represent non-spatial data using a spatial layout similar to a map. We present an experiment comparing different visual representations of spatialized data, to determine which representations are best for a non-trivial search and point ...
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Weaving Versus Blending: a quantitative assessment of the information carrying capacities of two alternative methods for conveying multivariate data with color.
Haleh Hagh-Shenas, Sunghee Kim, Victoria Interrante, Christopher Healey
Pages: 1270-1277
doi>10.1109/TVCG.2007.70623
Available formats: Publisher SitePublisher Site

In many applications, it is important to understand the individual values of, and relationships between, multiple related scalar variables defined across a common domain. Several approaches have been proposed for representing data in these situations.In ...
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Overview Use in Multiple Visual Information Resolution Interfaces
Heidi Lam, Tamara Munzner, Robert Kincaid
Pages: 1278-1285
doi>10.1109/TVCG.2007.70583
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In interfaces that provide multiple visual information resolutions (VIR), low-VIR overviews typically sacrifice visual details for display capacity, with the assumption that users can select regions of interest to examine at higher VIRs. Designers can ...
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Visualizing Changes of Hierarchical Data using Treemaps
Ying Tu, Han-Wei Shen
Pages: 1286-1293
doi>10.1109/TVCG.2007.70529
Available formats: Publisher SitePublisher Site

While the treemap is a popular method for visualizing hierarchical data, it is often difficult for users to track layout and attribute changes when the data evolve over time. When viewing the treemaps side by side or back and forth, there exist several ...
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Exploring Multiple Trees through DAG Representations
Martin Graham, Jessie Kennedy
Pages: 1294-1301
doi>10.1109/TVCG.2007.70556
Available formats: Publisher SitePublisher Site

We present a Directed Acyclic Graph visualisation designed to allow interaction with a set of multiple classification trees, specifically to find overlaps and differences between groups of trees and individual trees. The work is motivated by the need ...
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NodeTrix: a Hybrid Visualization of Social Networks
Nathalie Henry, Jean-Daniel Fekete, Michael J. McGuffin
Pages: 1302-1309
doi>10.1109/TVCG.2007.70582
Available formats: Publisher SitePublisher Site

The need to visualize large social networks is growing as hardware capabilities make analyzing large networks feasible and many new data sets become available. Unfortunately, the visualizations in existing systems do not satisfactorily resolve the basic ...
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Multi-Level Graph Layout on the GPU
Yaniv Frishman, Ayellet Tal
Pages: 1310-1319
doi>10.1109/TVCG.2007.70580
Available formats: Publisher SitePublisher Site

This paper presents a new algorithm for force directed graph layout on the GPU. The algorithm, whose goal is to compute layouts accurately and quickly, has two contributions. The first contribution is proposing a general multi-level scheme, which is ...
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Illustrative Deformation for Data Exploration
Carlos Correa, Debora Silver, Mi Chen
Pages: 1320-1327
doi>10.1109/TVCG.2007.70565
Available formats: Publisher SitePublisher Site

Much of the visualization research has focused on improving the rendering quality and speed, and enhancing the perceptibility of features in the data. Recently, significant emphasis has been placed on focus+context (F+C) techniques (e.g., fisheye views ...
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An Effective Illustrative Visualization Framework Based on Photic Extremum Lines (PELs)
Xuexiang Xie, Ying He, Feng Tian, Hock-Soon Seah, Xianfeng Gu, Hong Qin
Pages: 1328-1335
doi>10.1109/TVCG.2007.70538
Available formats: Publisher SitePublisher Site

Conveying shape using feature lines is an important visualization tool in visual computing. The existing feature lines (e.g., ridges, valleys, silhouettes, suggestive contours, etc.) are solely determined by local geometry properties (e.g., normals and ...
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Semantic Layers for Illustrative Volume Rendering
Peter Rautek, Stefan Bruckner, Eduard Groller
Pages: 1336-1343
doi>10.1109/TVCG.2007.70591
Available formats: Publisher SitePublisher Site

Direct volume rendering techniques map volumetric attributes (e.g., density, gradient magnitude, etc.) to visual styles. Commonly this mapping is specified by a transfer function. The specification of transfer functions is a complex task and requires ...
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Enhancing Depth-Perception with Flexible Volumetric Halos
Stefan Bruckner, Eduard Gröller
Pages: 1344-1351
doi>10.1109/TVCG.2007.70555
Available formats: Publisher SitePublisher Site

Volumetric data commonly has high depth complexity which makes it difficult to judge spatial relationships accurately. There are many different ways to enhance depth perception, such as shading, contours, and shadows. Artists and illustrators frequently ...
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Registration Techniques for Using Imperfect and Partially Calibrated Devices in Planar Multi-Projector Displays
Ezekiel Bhasker, Ray Juang, Aditi Majumder
Pages: 1352-1359
doi>10.1109/TVCG.2007.70587
Available formats: Publisher SitePublisher Site

Multi-projector displays today are automatically registered, both geometrically and photometrically, using cameras. Existing registration techniques assume pre-calibrated projectors and cameras that are devoid of imperfections such as lens distortion. ...
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A Unified Paradigm For Scalable Multi-Projector Displays
Niranjan Damera-Venkata, Nelson Chang, Jeffrey Dicarlo
Pages: 1360-1367
doi>10.1109/TVCG.2007.70536
Available formats: Publisher SitePublisher Site

We present a general framework for the modeling and optimization of scalable multi-projector displays. Based on this framework, we derive algorithms that can robustly optimize the visual quality of an arbitrary combination of projectors without manual ...
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Registration Techniques for Using Imperfect and Par tially Calibrated Devices in Planar Multi-Projector Displays
Ezekiel Bhasker, Ray Juang, Aditi Majumder
Pages: 1368-1375
doi>10.1109/TVCG.2007.70586
Available formats: Publisher SitePublisher Site

Multi-projector displays today are automatically registered, both geometrically and photometrically, using cameras. Existing registration techniques assume pre-calibrated projectors and cameras that are devoid of imperfections such as lens distor tion. ...
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Time Dependent Processing in a Parallel Pipeline Architecture
John Biddiscombe, Berk Geveci, Ken Martin, Kenneth Moreland, David Thompson
Pages: 1376-1383
doi>10.1109/TVCG.2007.70600
Available formats: Publisher SitePublisher Site

Pipeline architectures provide a versatile and efficient mechanism for constructing visualizations, and they have been implemented in numerous libraries and applications over the past two decades. In addition to allowing developers and users to freely ...
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Visual Verification and Analysis of Cluster Detection for Molecular Dynamics
Sebastian Grottel, Guido Reina, Jadran Vrabec, Thomas Ertl
Pages: 1384-1391
doi>10.1109/TVCG.2007.70615
Available formats: Publisher SitePublisher Site

A current research topic in molecular thermodynamics is the condensation of vapor to liquid and the investigation of this process at the molecular level. Condensation is found in many physical phenomena, e.g. the formation of atmospheric clouds or the ...
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Interactive Visual Analysis of Perfusion Data
Steffen Oeltze, Helmut Doleisch, Helwig Hauser, Philipp Muigg, Bernhard Preim
Pages: 1392-1399
doi>10.1109/TVCG.2007.70569
Available formats: Publisher SitePublisher Site

Perfusion data are dynamic medical image data which characterize the regional blood flow in human tissue. These data bear a great potential in medical diagnosis, since diseases can be better distinguished and detected at an earlier stage compared to ...
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Variable Interactions in Query-Driven Visualization
Luke Gosink, John Anderson, Wes Bethel, Kenneth Joy
Pages: 1400-1407
doi>10.1109/TVCG.2007.70519
Available formats: Publisher SitePublisher Site

Our ability to generate ever-larger, increasingly-complex data, has established the need for scalable methods that identify, and provide insight into, important variable trends and interactions. Query-driven methods are among the small subset of techniques ...
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Visual Analysis of the Air Pollution Problem in Hong Kong
Huamin Qu, Wing-Yi Chan, Anbang Xu, Kai-Lun Chung, Kai-Hon Lau, Ping Guo
Pages: 1408-1415
doi>10.1109/TVCG.2007.70523
Available formats: Publisher SitePublisher Site

We present a comprehensive system for weather data visualization. Weather data are multivariate and contain vector fields formed by wind speed and direction. Several well-established visualization techniques such as parallel coordinates and polar systems ...
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Topological Landscapes: A Terrain Metaphor for Scientific Data
Gunther Weber, Peer-Timo Bremer, Valerio Pascucci
Pages: 1416-1423
doi>10.1109/TVCG.2007.70601
Available formats: Publisher SitePublisher Site

Scientific visualization and illustration tools are designed to help people understand the structure and complexity of scientific data with images that are as informative and intuitive as possible. In this context the use of metaphors plays an important ...
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IStar: A Raster Representation for Scalable Image and Volume Data
Joe Kniss, Warren Hunt, Kristin Potter, Pradeep Sen
Pages: 1424-1431
doi>10.1109/TVCG.2007.70572
Available formats: Publisher SitePublisher Site

Topology has been an important tool for analyzing scalar data and flow fields in visualization. In this work, we analyze the topology of multivariate image and volume data sets with discontinuities in order to create an efficient, raster-based representation ...
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Topologically Clean Distance Fields
Attila Gyulassy, Mark Duchaineau, Vijay Natarajan, Valerio Pascucci, Eduardo Bringa, Andrew Higginbotham, Bernd Hamann
Pages: 1432-1439
doi>10.1109/TVCG.2007.70603
Available formats: Publisher SitePublisher Site

Analysis of the results obtained from material simulations is important in the physical sciences. Our research was motivated by the need to investigate the properties of a simulated porous solid as it is hit by a projectile. This paper describes two ...
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Efficient Computation of Morse-Smale Complexes for Three-dimensional Scalar Functions
Attila Gyulassy, Vijay Natarajan, Valerio Pascucci, Bernd Hamann
Pages: 1440-1447
doi>10.1109/TVCG.2007.70552
Available formats: Publisher SitePublisher Site

The Morse-Smale complex is an efficient representation of the gradient behavior of a scalar function, and critical points paired by the complex identify topological features and their importance. We present an algorithm that constructs the Morse-Smale ...
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Similarity-Guided Streamline Placement with Error Evaluation
Yuan Chen, Jonathan Cohen, Julian Krolik
Pages: 1448-1455
doi>10.1109/TVCG.2007.70595
Available formats: Publisher SitePublisher Site

Most streamline generation algorithms either provide a particular density of streamlines across the domain or explicitly detect features, such as critical points, and follow customized rules to emphasize those features. However, the former generally ...
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Efficient Visualization of Lagrangian Coherent Structures by Filtered AMR Ridge Extraction
Filip Sadlo, Ronald Peikert
Pages: 1456-1463
doi>10.1109/TVCG.2007.70554
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This paper presents a method for filtered ridge extraction based on adaptive mesh refinement. It is applicable in situations where the underlying scalar field can be refined during ridge extraction. This requirement is met by the concept of Lagrangian ...
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Efficient Computation and Visualization of Coherent Structures in Fluid Flow Applications
Christoph Garth, Florian Gerhardt, Xavier Tricoche, Hagen Hans
Pages: 1464-1471
doi>10.1109/TVCG.2007.70551
Available formats: Publisher SitePublisher Site

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 ...
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Texture-based feature tracking for effective time-varying data visualization
Jesus Caban, Alark Joshi, Penny Rheingans
Pages: 1472-1479
doi>10.1109/TVCG.2007.70599
Available formats: Publisher SitePublisher Site

Analyzing, visualizing, and illustrating changes within time-varying volumetric data is challenging due to the dynamic changes occurring between timesteps. The changes and variations in computational fluid dynamic volumes and atmospheric 3D datasets ...
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Interactive Visualization of Volumetric White Matter Connectivity in DT-MRI Using a Parallel-Hardware Hamilton-Jacobi Solver
Won-Ki Jeong, P. Thomas Fletcher, Ran Tao, Ross Whitaker
Pages: 1480-1487
doi>10.1109/TVCG.2007.70571
Available formats: Publisher SitePublisher Site

In this paper we present a method to compute and visualize volumetric white matter connectivity in diffusion tensor magnetic resonance imaging (DT-MRI) using a Hamilton-Jacobi (H-J) solver on the GPU (Graphics Processing Unit). Paths through the volume ...
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Visualizing Whole-Brain DTI Tractography with GPU-based Tuboids and LoD Management
Vid Petrovic, James Fallon, Falko Kuester
Pages: 1488-1495
doi>10.1109/TVCG.2007.70532
Available formats: Publisher SitePublisher Site

Diffusion Tensor Imaging (DTI) of the human brain, coupled with tractography techniques, enable the extraction of large-collections of three-dimensional tract pathways per subject. These pathways andpathway bundles represent the connectivity between ...
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Topological Visualization of Brain Diffusion MRI Data
Thomas Schultz, Holger Theisel, Hans-Peter Seidel
Pages: 1496-1503
doi>10.1109/TVCG.2007.70602
Available formats: Publisher SitePublisher Site

Topological methods give concise and expressive visual representations of flow fields. The present work suggests acomparable method for the visualization of human brain diffusion MRI data. We explore existing techniques for the topological analysis of ...
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Stochastic DT-MRI Connectivity Mapping on the GPU
Tim McGraw, Mariappan Nadar
Pages: 1504-1511
doi>10.1109/TVCG.2007.70597
Available formats: Publisher SitePublisher Site

We present a method for stochastic fiber tract mapping from diffusion tensor MRI (DT-MRI) implemented on graphics hardware. From the simulated fibers we compute a connectivity map that gives an indication of the probability that two points in the dataset ...
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Efficient Surface Reconstruction using Generalized Coulomb Potentials
Andrei C. Jalba, Jos B. T. M. Roerdink
Pages: 1512-1519
doi>10.1109/TVCG.2007.70553
Available formats: Publisher SitePublisher Site

We propose a novel, geometrically adaptive method for surface reconstruction from noisy and sparse point clouds, without orientation information. The method employs a fast convection algorithm to attract the evolving surface towards the data points. ...
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Surface Extraction from Multi-Material Components for Metrology using Dual Energy CT
Christoph Heinzl, Johann Kastner, Eduard Gröller
Pages: 1520-1527
doi>10.1109/TVCG.2007.70598
Available formats: Publisher SitePublisher Site

This paper describes a novel method for creating surface models of multi-material components using dual energy computed tomography (DECT). The application scenario is metrology and dimensional measurement in industrial high resolution 3D x-ray computed ...
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Construction of Simplified Boundary Surfaces from Serial-sectioned Metal Micrographs
Scott Dillard, John Bingert, Dan Thoma, Bernd Hamann
Pages: 1528-1535
doi>10.1109/TVCG.2007.70543
Available formats: Publisher SitePublisher Site

We present a method for extracting boundary surfaces from segmented cross-section image data. We use a constrained Potts model to interpolate an arbitrary number of region boundaries between segmented images. This produces a segmented volume from which ...
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Random-Accessible Compressed Triangle Meshes
Sung-eui Yoon, Peter Lindstrom
Pages: 1536-1543
doi>10.1109/TVCG.2007.70585
Available formats: Publisher SitePublisher Site

With the exponential growth in size of geometric data, it is becoming increasingly important to make effective use of multilevel caches, limited disk storage, and bandwidth. As a result, recent work in the visualization community has focused either on ...
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LiveSync: Deformed Viewing Spheres for Knowledge-Based Navigation
Peter Kohlmann, Stefan Bruckner, Armin Kanitsar, Eduard Gröller
Pages: 1544-1551
doi>10.1109/TVCG.2007.70576
Available formats: Publisher SitePublisher Site

Although real-time interactive volume rendering is available even for very large data sets, this visualization method is used quite rarely in the clinical practice. We suspect this is because it is very complicated and time consuming to adjust the parameters ...
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Navigating in a Shape Space of Registered Models
Randall Smith, Richard Pawlicki, István Kókai, Jörg Finger, Thomas Vetter
Pages: 1552-1559
doi>10.1109/TVCG.2007.70581
Available formats: Publisher SitePublisher Site

New product development involves people with different backgrounds.Designers, engineers, and consumers all have different criteria, and these criteria interact.Early concepts evolve in this kind of collaborative context, and there is a need for dynamic ...
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Querying and Creating Visualizations by Analogy
Carlos Scheidegger, Huy Vo, David Koop, Juliana Freire, Claudio Silva
Pages: 1560-1567
doi>10.1109/TVCG.2007.70584
Available formats: Publisher SitePublisher Site

While there have been advances in visualization systems, particularly in multi-view visualizations and visual exploration, the process of building visualizations remains a major bottleneck in data exploration. We show that provenance metadata collected ...
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Contextualized Videos: Combining Videos with Environment Models to Support Situational Understanding
Yi Wang, David M. Krum, Enylton M. Coelho, Doug A. Bowman
Pages: 1568-1575
doi>10.1109/TVCG.2007.70544
Available formats: Publisher SitePublisher Site

Multiple spatially-related videos are increasingly used in security, communication, and other applications. Since it can be difficult to understand the spatial relationships between multiple videos in complex environments (e.g. to predict a person’s ...
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Lattice-Based Volumetric Global Illumination
Feng Qiu, Fang Xu, Zhe Fan, Neophytou Neophytos, Arie Kaufman, Klaus Mueller
Pages: 1576-1583
doi>10.1109/TVCG.2007.70573
Available formats: Publisher SitePublisher Site

We describe a novel volumetric global illumination framework based on the Face-Centered Cubic (FCC) lattice. An FCC lattice has important advantages over a Cartesian lattice. It has higher packing density in the frequency domain, which translates to ...
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A Flexible Multi-Volume Shader Framework for Arbitrarily Intersecting Multi-Resolution Datasets
John Plate, Thorsten Holtkaemper, Bernd Froehlich
Pages: 1584-1591
doi>10.1109/TVCG.2007.70534
Available formats: Publisher SitePublisher Site

We present a powerful framework for 3D-texture-based rendering of multiple arbitrarily intersecting volumetric datasets. Each volume is represented by a multi-resolution octree-based structure and we use out-of-core techniques to support extremely large ...
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Scalable Hybrid Unstructured and Structured Grid Raycasting
Philipp Muigg, Markus Hadwiger, Helmut Doleisch, Helwig Hauser
Pages: 1592-1599
doi>10.1109/TVCG.2007.70588
Available formats: Publisher SitePublisher Site

This paper presents a scalable framework for real-time raycasting of large unstructured volumes that employs a hybrid bricking approach. It adaptively combines original unstructured bricks in important (focus) regions, with structured bricks that are ...
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Transform Coding for Hardware-accelerated Volume Rendering
Nathaniel Fout, Kwan-Liu Ma
Pages: 1600-1607
doi>10.1109/TVCG.2007.70516
Available formats: Publisher SitePublisher Site

Hardware-accelerated volume rendering using the GPU is now the standard approach for real-time volume rendering, although limited graphics memory can present a problem when rendering large volume data sets. Volumetric compression in which the decompression ...
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Molecular Surface Abstraction
Gregory Cipriano, Michael Gleicher
Pages: 1608-1615
doi>10.1109/TVCG.2007.70578
Available formats: Publisher SitePublisher Site

In this paper we introduce a visualization technique that provides an abstracted view of the shape and spatio-physico-chemical properties of complex molecules. Unlike existing molecular viewing methods, our approach suppresses small details to facilitate ...
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Two-Level Approach to Efficient Visualization of Protein Dynamics
Ove Daae Lampe, Ivan Viola, Nathalie Reuter, Helwig Hauser
Pages: 1616-1623
doi>10.1109/TVCG.2007.70517
Available formats: Publisher SitePublisher Site

Proteins are highly flexible and large amplitude deformations of their structure, also called slow dynamics, are often decisive to their function. We present a two-level rendering approach that enables visualization of slow dynamics of large protein ...
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Visual Verification and Analysis of Cluster Detection for Molecular Dynamics
Sebastian Grottel, Guido Reina, Jadran Vrabec, Thomas Ertl
Pages: 1624-1631
doi>10.1109/TVCG.2007.70614
Available formats: Publisher SitePublisher Site

A current research topic in molecular thermodynamics is the condensation of vapor to liquid and the investigation of this process at the molecular level. Condensation is found in many physical phenomena, e.g. the formation of atmospheric clouds or the ...
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CoViCAD: Comprehensive Visualization of Coronary Artery Disease
Maurice Termeer, Javier Oliván Bescós, Marcel Breeuwer, Anna Vilanova, Frans Gerritsen, Eduard Gröller
Pages: 1632-1639
doi>10.1109/TVCG.2007.70550
Available formats: Publisher SitePublisher Site

We present novel, comprehensive visualization techniques for the diagnosis of patients with Coronary Artery Disease using segmented cardiac MRI data. We extent an accepted medical visualization technique called the bull's eye plot by removing discontinuities, ...
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Visualizing Large-Scale Uncertainty in Astrophysical Data
Hongwei Li, Chi-Wing Fu, Yinggang Li, Andrew Hanson
Pages: 1640-1647
doi>10.1109/TVCG.2007.70530
Available formats: Publisher SitePublisher Site

Visualization of uncertainty or error in astrophysical data is seldom available in simulations of astronomical phenomena, and yet almost all rendered attributes possess some degree of uncertainty due to observational error. Uncertainties associated with ...
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Uncertainty Visualization in Medical Volume Rendering Using Probabilistic Animation
Claes Lundström, Patric Ljung, Anders Persson, Anders Ynnerman
Pages: 1648-1655
doi>10.1109/TVCG.2007.70518
Available formats: Publisher SitePublisher Site

Direct Volume Rendering has proved to be an effective visualization method for medical data sets and has reached wide-spread clinical use. The diagnostic exploration, in essence, corresponds to a tissue classification task, which is often complex and ...
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Grid With a View: Optimal Texturing for Perception of Layered Surface Shape
Alethea Bair, Donald House
Pages: 1656-1663
doi>10.1109/TVCG.2007.70559
Available formats: Publisher SitePublisher Site

We present the results of two controlled studies comparing layered surface visualizations under various texture conditions. The task was to estimate surface normals, measured by accuracy of a hand-set surface normal probe. A single surface visualization ...
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Conjoint Analysis to Measure the Perceived Quality in Volume Rendering
Joachim Giesen, Klaus Mueller, Eva Schuberth, Lujin Wang, Peter Zolliker
Pages: 1664-1671
doi>10.1109/TVCG.2007.70542
Available formats: Publisher SitePublisher Site

Visualization algorithms can have a large number of parameters, making the space of possible rendering results rather high-dimensional. Only a systematic analysis of the perceived quality can truly reveal the optimal setting for each such parameter. ...
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Interactive sound rendering in complex and dynamic scenes using frustum tracing
Christian Lauterbach, Anish Chandak, Dinesh Manocha
Pages: 1672-1679
doi>10.1109/TVCG.2007.70567
Available formats: Publisher SitePublisher Site

We present a new approach for simulating real-time sound propagation in complex, virtual scenes with dynamic sources and objects. Our approach combines the efficiency of interactive ray tracing with the accuracy of tracing a volumetric representation. ...
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Listener-based Analysis of Surface Importance for Acoustic Metrics
Frank Michel, Eduard Deines, Martin Hering-Bertram, Christoph Garth, Hans Hagen
Pages: 1680-1687
doi>10.1109/TVCG.2007.70575
Available formats: Publisher SitePublisher Site

Acoustic quality in room acoustics is measured by well defined quantities, like definition, which can be derived from simulated impulse response filters or measured values. These take into account the intensity and phase shift of multiple reflections ...
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Shadow-Driven 4D Haptic Visualization
Hui Zhang, Andrew Hanson
Pages: 1688-1695
doi>10.1109/TVCG.2007.70593
Available formats: Publisher SitePublisher Site

Just as we can work with two-dimensional floor plans to communicate 3D architectural design, we can exploit reduced-dimension shadows to manipulate the higher-dimensional objects generating the shadows.In particular, by taking advantage of physically ...
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High-Quality Multimodal Volume Rendering for Preoperative Planning of Neurosurgical Interventions
Johanna Beyer, Markus Hadwiger, Stefan Wolfsberger, Katja Bühler
Pages: 1696-1703
doi>10.1109/TVCG.2007.70560
Available formats: Publisher SitePublisher Site

Surgical approaches tailored to an individual patient's anatomy and pathology have become standard in neurosurgery. Precise preoperative planning of these procedures, however, is necessary to achieve an optimal therapeutic effect. Therefore, multiple ...
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Topology, Accuracy, and Quality of Isosurface Meshes Using Dynamic Particles
Miriah Meyer, Robert M. Kirby, Ross Whitaker
Pages: 1704-1711
doi>10.1109/TVCG.2007.70604
Available formats: Publisher SitePublisher Site

This paper describes a method for constructing isosurface triangulations of sampled, volumetric, three-dimensional scalar fields.The resulting meshes consist of triangles that are of consistently high quality, making them well suited for accurate interpolation ...
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Visualization of Cosmological Particle-Based Datasets
Paul Navratil, Jarrett Johnson, Volker Bromm
Pages: 1712-1718
doi>10.1109/TVCG.2007.70526
Available formats: Publisher SitePublisher Site

We describe our visualization process for a particle-based simulation of the formation of the first stars and their impact on cosmic history. The dataset consists of several hundred time-steps of point simulation data, with each time-step containing ...
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Segmentation of Three-dimensional Retinal Image Data
Alfred Fuller, Robert Zawadzki, Stacey Choi, David Wiley, John Werner, Bernd Hamann
Pages: 1719-1726
doi>10.1109/TVCG.2007.70590
Available formats: Publisher SitePublisher Site

We have combined methods from volume visualization and data analysis to support better diagnosis and treatment of human retinal diseases. Many diseases can be identified by abnormalities in the thicknesses of various retinal layers captured using optical ...
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Interactive Isosurface Ray Tracing of Time-Varying Tetrahedral Volumes
Ingo Wald, Heiko Friedrich, Aaron Knoll, Charles D. Hansen
Pages: 1727-1734
doi>10.1109/TVCG.2007.70566
Available formats: Publisher SitePublisher Site

We describe a system for interactively rendering isosurfaces of tetrahedral finite-element scalar fields using coherent ray tracing techniques on the CPU. By employing state-of-the art methods in polygonal ray tracing, namely aggressive packet/frustum ...
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Generalized Streak Lines: Analysis and Visualization of Boundary Induced Vortices
Alexander Wiebel, Xavier Tricoche, Dominic Schneider, Heike Jaenicke, Gerik Scheuermann
Pages: 1735-1742
doi>10.1109/TVCG.2007.70557
Available formats: Publisher SitePublisher Site

We present a method to extract and visualize vortices that originate from bounding walls of three-dimensional time-dependent flows. These vortices can be detected using their footprint on the boundary, which consists of critical points in the wall shear ...
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Moment Invariants for the Analysis of 2D Flow Fields
Michael Schlemmer, Manuel Heringer, Florian Morr, Ingrid Hotz, Martin Hering-Bertram, Christoph Garth, Wolfgang Kollmann, Bernd Hamann, Hans Hagen
Pages: 1743-1750
doi>10.1109/TVCG.2007.70579
Available formats: Publisher SitePublisher Site

We present a novel approach for analyzing two-dimensional (2D) flow field data based on the idea of invariant moments. Moment invariants have traditionally been used in computer vision applications, and we have adapted them for the purpose of interactive ...
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Virtual Rheoscopic Fluids for Flow Visualization
William Barth, Christopher Burns
Pages: 1751-1758
doi>10.1109/TVCG.2007.70610
Available formats: Publisher SitePublisher Site

Physics-based flow visualization techniques seek to mimic laboratory flow visualization methods with virtual analogues. In this work we describe the rendering of a virtual rheoscopic fluid to produce images with results strikingly similar to laboratory ...
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Cores of Swirling Particle Motion in Unsteady Flows
Tino Weinkauf, Jan Sahner, Holger Theisel, Hans-Christian Hege
Pages: 1759-1766
doi>10.1109/TVCG.2007.70545
Available formats: Publisher SitePublisher Site

In nature and in flow experiments particles form patterns of swirling motion in certain locations. Existing approaches identify these structures by considering the behavior of stream lines. However, in unsteady flows particle motion is described by path ...
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IEEE Visualization Conference and IEEE Information Visualization Conference Proceedings 2007 back matter
Page: backmatter
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