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Displaying 1-50 out of 72 total
Prefix Tag Clouds
Found in: 2013 17th International Conference on Information Visualisation
By Michael Burch,Steffen Lohmann,Daniel Pompe,Daniel Weiskopf
Issue Date:July 2013
pp. 45-50
Tag clouds are a popular way to visually represent word frequencies. However, one major limitation is that they do not relate different word forms but treat every form as an individual tag. This results not only in a non-efficient use of screen space but, ...
 
Visualization of Cell-Based Higher-Order Fields
Found in: Computing in Science and Engineering
By Filip Sadlo, Markus Uffinger, Christian Pagot, Daniel Osmari, João Comba, Thomas Ertl, Claus-Dieter Munz, Daniel Weiskopf
Issue Date:May 2011
pp. 84-91
<p>Direct visualization of higher-order data avoids the error and overhead introduced by the widely used resampling approach.</p>
 
The Visualization Process: The Path from Data to Insight
Found in: Visualization Conference, IEEE
By Kelly Gaither, David Ebert, Daniel Weiskopf, Pat Hanrahan
Issue Date:October 2005
pp. 118
While previous Visualization panels have focused on different methods for scientific visualization, this panel focuses on the process of transforming data into insight. The overarching goal for visualization is to transform data into information or knowled...
 
Space-Time Visual Analytics of Eye-Tracking Data for Dynamic Stimuli
Found in: IEEE Transactions on Visualization and Computer Graphics
By Kuno Kurzhals,Daniel Weiskopf
Issue Date:December 2013
pp. 2129-2138
We introduce a visual analytics method to analyze eye movement data recorded for dynamic stimuli such as video or animated graphics. The focus lies on the analysis of data of several viewers to identify trends in the general viewing behavior, including tim...
 
Ambient Volume Scattering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marco Ament,Filip Sadlo,Daniel Weiskopf
Issue Date:December 2013
pp. 2936-2945
We present ambient scattering as a preintegration method for scattering on mesoscopic scales in direct volume rendering. Far-range scattering effects usually provide negligible contributions to a given location due to the exponential attenuation with incre...
 
Visualizing Fuzzy Overlapping Communities in Networks
Found in: IEEE Transactions on Visualization and Computer Graphics
By Corinna Vehlow,Thomas Reinhardt,Daniel Weiskopf
Issue Date:December 2013
pp. 2486-2495
An important feature of networks for many application domains is their community structure. This is because objects within the same community usually have at least one property in common. The investigation of community structure can therefore support the u...
 
Texture-Based Flow Visualization
Found in: Computing in Science & Engineering
By Rudolf Netzel,Daniel Weiskopf
Issue Date:November 2013
pp. 96-102
Texture-based visualization is a powerful and versatile tool for depicting steady and unsteady flow.
 
Dye-Based Flow Visualization
Found in: Computing in Science & Engineering
By Grzegorz K. Karch,Filip Sadlo,Daniel Weiskopf,Charles D. Hansen,Guo-Shi Li,Thomas Ertl
Issue Date:November 2012
pp. 80-86
Computational dye advection helps engineers understand fluid dynamics simulations by providing interactive tools that mimic physical experiments.
 
Interactive Visualization and Simulation of Astronomical Nebulae
Found in: Computing in Science & Engineering
By Stephan Wenger,Marco Ament,Wolfgang Steffen,Nico Koning,Daniel Weiskopf,Marcus Magnor
Issue Date:May 2012
pp. 78-87
Interactive visualization and simulation of astrophysical phenomena help astronomers and enable digital planetariums and television documentaries to take their spectators on a journey into deep space to explore the astronomical wonders of our universe in 3...
 
General-Relativistic Visualization
Found in: Computing in Science and Engineering
By Thomas Müller,Daniel Weiskopf
Issue Date:November 2011
pp. 64-71
General-relativistic visualization helps us understand what we could see when massive objects curve spacetime.
 
Flow Radar Glyphs&#8212;Static Visualization of Unsteady Flow with Uncertainty
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marcel Hlawatsch,Philipp Leube,Wolfgang Nowak,Daniel Weiskopf
Issue Date:December 2011
pp. 1949-1958
A new type of glyph is introduced to visualize unsteady flow with static images, allowing easier analysis of time-dependent phenomena compared to animated visualization. Adopting the visual metaphor of radar displays, this glyph represents flow directions ...
 
Parallel Edge Splatting for Scalable Dynamic Graph Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Michael Burch,Corinna Vehlow,Fabian Beck,Stephan Diehl,Daniel Weiskopf
Issue Date:December 2011
pp. 2344-2353
We present a novel dynamic graph visualization technique based on node-link diagrams. The graphs are drawn side-byside from left to right as a sequence of narrow stripes that are placed perpendicular to the horizontal time line. The hierarchically organize...
 
A Report From VisWeek 2010
Found in: Computing in Science and Engineering
By Carlos Scheidegger, Cláudio T. Silva, Daniel Weiskopf
Issue Date:March 2011
pp. 70-77
<p>VisWeek 2010 covered the latest visualization and data analysis research and offered an excellent forum for discussing new trends in these fields.</p>
 
Guest Editor's Introduction: Special Section on the Eurographics Symposium on Parallel Graphics and Visualization (EGPGV)
Found in: IEEE Transactions on Visualization and Computer Graphics
By João Comba, Daniel Weiskopf
Issue Date:February 2011
pp. 130-131
No summary available.
 
Hue-Preserving Color Blending
Found in: IEEE Transactions on Visualization and Computer Graphics
By Johnson Chuang, Daniel Weiskopf, Torsten Möller
Issue Date:November 2009
pp. 1275-1282
We propose a new perception-guided compositing operator for color blending. The operator maintains the same rules for achromatic compositing as standard operators (such as the over operator), but it modifies the computation of the chromatic channels. Chrom...
 
Visual Signatures in Video Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Min Chen,Ralf Botchen,Rudy Hashim,Daniel Weiskopf,Thomas Ertl,Ian Thornton
Issue Date:September 2006
pp. 1093-1100
Video visualization is a computation process that extracts meaningful information from original video data sets and conveys the extracted information to users in appropriate visual representations. This paper presents a broad treatment of the subject, foll...
 
Visual Adjacency Lists for Dynamic Graphs
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marcel Hlawatsch,Michael Burch,Daniel Weiskopf
Issue Date:November 2014
pp. 1-1
We present a visual representation for dynamic, weighted graphs based on the concept of adjacency lists. Two orthogonal axes are used: one for all nodes of the displayed graph, the other for the corresponding links. Colors and labels are employed to identi...
 
RadCloud: Visualizing Multiple Texts with Merged Word Clouds
Found in: 2014 18th International Conference on Information Visualisation (IV)
By Michael Burch,Steffen Lohmann,Fabian Beck,Nils Rodriguez,Lorenzo Di Silvestro,Daniel Weiskopf
Issue Date:July 2014
pp. 108-113
Word clouds are a popular means for summarizing text documents. They usually visualize the word frequencies from single text sources, sometimes along with other attributes. However, the visualization of several text documents in one word cloud has rarely b...
 
Radial Layered Matrix Visualization of Dynamic Graphs
Found in: 2013 17th International Conference on Information Visualisation
By Corinna Vehlow,Michael Burch,Hansjorg Schmauder,Daniel Weiskopf
Issue Date:July 2013
pp. 51-58
We propose a novel radial layered matrix visualization for dynamic directed weighted graphs in which the vertices can also be hierarchically organized. Edges are represented as color-coded arcs within the radial diagram. Their positions are defined by pola...
 
A Matrix-Based Visualization for Exploring Dynamic Compound Digraphs
Found in: 2013 17th International Conference on Information Visualisation
By Michael Burch,Benjamin Schmidt,Daniel Weiskopf
Issue Date:July 2013
pp. 66-73
We introduce a matrix-based visualization technique for exploring time-varying directed and weighted graphs. Two overview representations are shown: one for the time-aggregated relations with attached quantitative weighted attributes and one for the result...
 
Edge Bundling by Rapidly-Exploring Random Trees
Found in: 2013 17th International Conference on Information Visualisation
By Michael Burch,Hansjorg Schmauder,Daniel Weiskopf
Issue Date:July 2013
pp. 28-35
We introduce a technique for bundling edges in graphs where a hierarchical organization of the vertices is not available. Instead of applying time-complex force-directed edge bundling, we adopt the concept of Rapidly-Exploring Random Trees (RRTs). We use R...
 
Inter-active learning of ad-hoc classifiers for video visual analytics
Found in: 2012 IEEE Conference on Visual Analytics Science and Technology (VAST)
By Benjamin Hoferlin,Rudolf Netzel,Markus Hoferlin,Daniel Weiskopf,Gunther Heidemann
Issue Date:October 2012
pp. 23-32
Learning of classifiers to be used as filters within the analytical reasoning process leads to new and aggravates existing challenges. Such classifiers are typically trained ad-hoc, with tight time constraints that affect the amount and the quality of anno...
 
Evaluation of Traditional, Orthogonal, and Radial Tree Diagrams by an Eye Tracking Study
Found in: IEEE Transactions on Visualization and Computer Graphics
By Michael Burch,Natalia Konevtsova,Julian Heinrich,Markus Hoeferlin,Daniel Weiskopf
Issue Date:December 2011
pp. 2440-2448
Node-link diagrams are an effective and popular visualization approach for depicting hierarchical structures and for showing parent-child relationships. In this paper, we present the results of an eye tracking experiment investigating traditional, orthogon...
 
Layered TimeRadarTrees
Found in: Information Visualisation, International Conference on
By Michael Burch, Markus Höferlin, Daniel Weiskopf
Issue Date:July 2011
pp. 18-25
We introduce a novel technique for visualizing dense time-varying directed and weighted multi-graphs with an additional hierarchical organization of the graph nodes. Combining Indented Tree Plots and TimeRadarTrees, we show the temporal evolution of relati...
 
Special-Relativistic Visualization
Found in: Computing in Science and Engineering
By Thomas Müller, Daniel Weiskopf
Issue Date:July 2011
pp. 85-93
<p>Special-relativistic visualization helps us understand what we would see if we could travel with a velocity close to the speed of light.</p>
 
Visual Comparability of 3D Regular Sampling and Reconstruction
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tai Meng,Alireza Entezari,Benjamin Smith,Torsten Möller,Daniel Weiskopf,Arthur E. Kirkpatrick
Issue Date:October 2011
pp. 1420-1432
The Body-Centered Cubic (BCC) and Face-Centered Cubic (FCC) lattices have been analytically shown to be more efficient sampling lattices than the traditional Cartesian Cubic (CC) lattice, but there has been no estimate of their visual comparability. Two pe...
 
Hierarchical Line Integration
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marcel Hlawatsch, Filip Sadlo, Daniel Weiskopf
Issue Date:August 2011
pp. 1148-1163
This paper presents an acceleration scheme for the numerical computation of sets of trajectories in vector fields or iterated solutions in maps, possibly with simultaneous evaluation of quantities along the curves such as integrals or extrema. It addresses...
 
Direct Interval Volume Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marco Ament, Daniel Weiskopf, Hamish Carr
Issue Date:November 2010
pp. 1505-1514
We extend direct volume rendering with a unified model for generalized isosurfaces, also called interval volumes, allowing a wider spectrum of visual classification. We generalize the concept of scale-invariant opacity&#8212;typical for isosurface rend...
 
Special Relativistic Visualization by Local Ray Tracing
Found in: IEEE Transactions on Visualization and Computer Graphics
By Thomas Müller, Sebastian Grottel, Daniel Weiskopf
Issue Date:November 2010
pp. 1243-1250
Special relativistic visualization offers the possibility of experiencing the optical effects of traveling near the speed of light, including apparent geometric distortions as well as Doppler and searchlight effects. Early high-quality computer graphics im...
 
Sort-First Parallel Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Brendan Moloney, Marco Ament, Daniel Weiskopf, Torsten Möller
Issue Date:August 2011
pp. 1164-1177
Sort-first distributions have been studied and used far less than sort-last distributions for parallel volume rendering, especially when the data are too large to be replicated fully. We demonstrate that sort-first distributions are not only a viable metho...
 
Coherent Structures of Characteristic Curves in Symmetric Second Order Tensor Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By Marcel Hlawatsch, Joachim E. Vollrath, Filip Sadlo, Daniel Weiskopf
Issue Date:June 2011
pp. 781-794
This paper generalizes the concept of Lagrangian coherent structures, which is known for its potential to visualize coherent regions in vector fields and to distinguish them from each other. In particular, we extend the concept of the flow map to generic m...
 
Visualizing the Evolution and Interaction of Vortices and Shear Layers in Time-Dependent 3D Flow
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tobias Schafhitzel, Kudret Baysal, Mikael Vaaraniemi, Ulrich Rist, Daniel Weiskopf
Issue Date:April 2011
pp. 412-425
In this paper, we present a visualization and tracking system for coherent structures. For this purpose, we propose to consider shear stress—the stretching and shear of particles inside a flow—in vortex dynamics. Based on a discussion and comparison of rec...
 
Continuous Parallel Coordinates
Found in: IEEE Transactions on Visualization and Computer Graphics
By Julian Heinrich, Daniel Weiskopf
Issue Date:November 2009
pp. 1531-1538
Typical scientific data is represented on a grid with appropriate interpolation or approximation schemes,defined on a continuous domain. The visualization of such data in parallel coordinates may reveal patterns latently contained in the data and thus can ...
 
Continuous Scatterplots
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sven Bachthaler, Daniel Weiskopf
Issue Date:November 2008
pp. 1428-1435
Scatterplots are well established means of visualizing discrete data values with two data variables as a collection of discrete points. We aim at generalizing the concept of scatterplots to the visualization of spatially continuous input data by a continuo...
 
Action-Based Multifield Video Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Ralf P. Botchen, Sven Bachthaler, Fabian Schick, Min Chen, Greg Mori, Daniel Weiskopf, Thomas Ertl
Issue Date:July 2008
pp. 885-899
One challenge in video processing is to detect actions and events, known or unknown, in video streams dynamically. This paper proposes a visualization solution, where a video stream is depicted as a series of snapshots at a relatively sparse interval, and ...
 
Flow Charts: Visualization of Vector Fields on Arbitrary Surfaces
Found in: IEEE Transactions on Visualization and Computer Graphics
By Guo-Shi Li, Xavier Tricoche, Daniel Weiskopf, Charles D. Hansen
Issue Date:September 2008
pp. 1067-1080
We introduce a novel flow visualization method called Flow Charts, which uses a texture atlas approach for the visualization of flows defined over curved surfaces. In this scheme the surface and its associated flow are segmented into overlapping patches wh...
 
Animation of Orthogonal Texture Patterns for Vector Field Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sven Bachthaler, Daniel Weiskopf
Issue Date:July 2008
pp. 741-755
This paper introduces orthogonal vector field visualization on 2D manifolds: a representation by lines that are perpendicular to the input vector field. Line patterns are generated by line integral convolution (LIC). This visualization is combined with ani...
 
Output-Sensitive 3D Line Integral Convolution
Found in: IEEE Transactions on Visualization and Computer Graphics
By Martin Falk, Daniel Weiskopf
Issue Date:July 2008
pp. 820-834
We propose an output-sensitive visualization method for 3D line integral convolution (LIC) whose rendering speed is largely independent of the data set size and mostly governed by the complexity of the output on the image plane. Our approach of view-depend...
 
Texture-Based Visualization of Unsteady 3D Flow by Real-Time Advection and Volumetric Illumination
Found in: IEEE Transactions on Visualization and Computer Graphics
By Daniel Weiskopf, Tobias Schafhitzel, Thomas Ertl
Issue Date:May 2007
pp. 569-582
<p><b>Abstract</b>—This paper presents an interactive technique for the dense texture-based visualization of unsteady 3D flow, taking into account issues of computational efficiency and visual perception. High efficiency is achieved by a ...
 
A Spectral Analysis of Function Composition and its Implications for Sampling in Direct Volume Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Steven Bergner,Torsten Möller,Daniel Weiskopf,David J. Muraki
Issue Date:September 2006
pp. 1353-1360
In this paper we investigate the effects of function composition in the form g(f(x)) = h(x) by means of a spectral analysis of h. We decompose the spectral description of h(x) into a scalar product of the spectral description of g(x) and a term that solely...
 
Explanatory and Illustrative Visualization of Special and General Relativity
Found in: IEEE Transactions on Visualization and Computer Graphics
By Daniel Weiskopf, Marc Borchers, Thomas Ertl, Martin Falk, Oliver Fechtig, Regine Frank, Frank Grave, Andreas King, Ute Kraus, Thomas Müller, Hans-Peter Nollert, Isabel Rica Mendez, Hanns Ruder, Tobias Schafhitzel, Sonja Schär, Corvin Zahn, Mi
Issue Date:July 2006
pp. 522-534
<p><b>Abstract</b>—This paper describes methods for explanatory and illustrative visualizations used to communicate aspects of Einstein's theories of special and general relativity, their geometric structure, and of the related fields of ...
 
Particle and Texture Based Spatiotemporal Visualization of Time-Dependent Vector Fields
Found in: Visualization Conference, IEEE
By Daniel Weiskopf, Frederik Schramm, Gordon Erlebacher, Thomas Ertl
Issue Date:October 2005
pp. 81
We propose a hybrid particle and texture based approach for the visualization of time-dependent vector fields. The underlying spacetime framework builds a dense vector field representation in a twostep process: 1) particle-based forward integration of traj...
 
Visualization in the Einstein Year 2005: A Case Study on Explanatory and Illustrative Visualization of Relativity and Astrophysics
Found in: Visualization Conference, IEEE
By Daniel Weiskopf, Marc Borchers, Thomas Ertl, Martin Falk, Oliver Fechtig, Regine Frank, Frank Grave, Andreas King, Ute Kraus, Thomas Muller, Hans-Peter Nollert, Isabel Rica Mendez, Hanns Ruder, Corvin Zahn, Michael Zatloukal, Tobias Schafhitzel, Sonja Scha
Issue Date:October 2005
pp. 74
In this application paper, we report on over fifteen years of experience with relativistic and astrophysical visualization, which has been culminating in a substantial engagement for visualization in the Einstein Year 2005 - the 100th anniversary of Einste...
 
Texture-Based Visualization of Uncertainty in Flow Fields
Found in: Visualization Conference, IEEE
By Ralf P. Botchen, Daniel Weiskopf
Issue Date:October 2005
pp. 82
In this paper, we present two novel texture-based techniques to visualize uncertainty in time-dependent 2D flow fields. Both methods use semi-Lagrangian texture advection to show flow direction by streaklines and convey uncertainty by blurring these streak...
 
Interactive Exploration of Unsteady 3D Flow with Linked 2D/3D Texture Advection
Found in: Coordinated and Multiple Views in Exploratory Visualization, International Conference on
By Tobias Schafhitzel, Daniel Weiskopf, Thomas Ertl
Issue Date:July 2005
pp. 96-105
In this paper, we present linked 2D/3D texture advection for the interactive exploration of 3D flow. 3D texture advection facilitates a dense representation of the 3D structure of unsteady flow but is subject to problems of occlusion and clutter. Therefore...
 
Investigating Swirl and Tumble Flow with a Comparison of Visualization Techniques
Found in: Visualization Conference, IEEE
By Robert S. Laramee, Daniel Weiskopf, Jürgen Schneider, Helwig Hauser
Issue Date:October 2004
pp. 51-58
We investigate two important, common fluid flow patterns from computational fluid dynamics (CFD) simulations, namely, swirl and tumble motion typical of automotive engines. We study and visualize swirl and tumble flow using three different flow visualizati...
 
On the Role of Color in the Perception of Motion in Animated Visualizations
Found in: Visualization Conference, IEEE
By Daniel Weiskopf
Issue Date:October 2004
pp. 305-312
Although luminance contrast plays a predominant role in motion perception, significant additional effects are introduced by chromatic contrasts. In this paper, relevant results from psychophysical and physiological research are described to clarify the rol...
 
Frame-to-Frame Coherent Halftoning in Image Space
Found in: Theory and Practice of Computer Graphics
By Mike Eissele, Daniel Weiskopf, Thomas Ertl
Issue Date:June 2004
pp. 188-195
We present an interactive technique for generating halftoning animations in image space. We specifically consider a halftoning approach that uses screening methods to achieve shading, brightness, and texture by placing varying patterns. Our technique trans...
 
Maintaining Constant Frame Rates in 3D Texture-Based Volume Rendering
Found in: Computer Graphics International Conference
By Daniel Weiskopf, Manfred Weiler, Thomas Ertl
Issue Date:June 2004
pp. 604-607
3D texture-based volume rendering is a popular way of realizing direct volume visualization on graphics hardware. However, the slice-oriented texture memory layout of many current GPUs may lead to a strongly view-dependent performance, which reduces the fi...
 
A Texture-Based Framework for Spacetime-Coherent Visualization of Time-Dependent Vector Fields
Found in: Visualization Conference, IEEE
By Daniel Weiskopf, Gordon Erlebacher, Thomas Ertl
Issue Date:October 2003
pp. 15
We propose Unsteady Flow Advection-Convolution (UFAC) as a novel visualization approach for unsteady flows. It performs time evolution governed by pathlines, but builds spatial correlation according to instantaneous streamlines whose spatial extent is cont...
 
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