Now showing items 1-20 of 41

    • Instant Volume Visualization using Maximum Intensity Difference Accumulation 

      Bruckner, Stefan; Gröller, M. Eduard (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      It has long been recognized that transfer function setup for Direct Volume Rendering (DVR) is crucial to its usability. However, the task of finding an appropriate transfer function is complex and time-consuming even for ...
    • Bivariate Transfer Functions on Unstructured Grids 

      Song, Yuyan; Chen, Wei; Maciejewski, Ross; Gaither, Kelly P.; Ebert, David S. (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Multi-dimensional transfer functions are commonly used in rectilinear volume renderings to effectively portray materials, material boundaries and even subtle variations along boundaries. However, most unstructured grid ...
    • Semi-Automatic Time-Series Transfer Functions via Temporal Clustering and Sequencing 

      Woodring, Jonathan; Shen, Han-Wei (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      When creating transfer functions for time-varying data, it is not clear what range of values to use for classification, as data value ranges and distributions change over time. In order to generate time-varying transfer ...
    • The Gödel Engine - An Interactive Approach to Visualization in General Relativity 

      Grave, Frank; Müller, Thomas; Dachsbacher, Carsten; Wunner, Günter (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      We present a methodical new approach to visualize the aspects of general relativity from a self-centered perspective. We focus on the visualization of the Gödel universe, which is an exact solution to Einstein s field ...
    • Direct Visualization of Deformation in Volumes 

      Busking, Stef; Botha, Charl P.; Post, Frits H. (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Deformation is a topic of interest in many disciplines. In particular in medical research, deformations of surfaces and even entire volumetric structures are of interest. Clear visualization of such deformations can lead ...
    • Accelerating Volume Raycasting using Proxy Spheres 

      Liu, Baoquan; Clapworthy, Gordon J.; Dong, Feng (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      In this paper, we propose an efficient solution that addresses the performance problems of current single-pass GPU raycasting algorithms. Our paper provides more control over the rendering process by introducing tighter ...
    • MultiClusterTree: Interactive Visual Exploration of Hierarchical Clusters in Multidimensional Multivariate Data 

      Long, Tran Van; Linsen, Lars (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Visual analytics of multidimensional multivariate data is a challenging task because of the difficulty in understanding metrics in attribute spaces with more than three dimensions. Frequently, the analysis goal is not to ...
    • Visualisation of Sensor Data from Animal Movement 

      Grundy, Edward; Jones, Mark W.; Laramee, Robert S.; Wilson, Rory P.; Shepard, Emily L. C. (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      A new area of biological research is identifying and grouping patterns of behaviour in wild animals by analysing data obtained through the attachment of tri-axial accelerometers. As these recording devices become smaller ...
    • Selecting Good Views of High-dimensional Data using Class Consistency 

      Sips, Mike; Neubert, Boris; Lewis, John P.; Hanrahan, Pat (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Abstract Many visualization techniques involve mapping high-dimensional data spaces to lower-dimensional views. Unfortunately, mapping a high-dimensional data space into a scatterplot involves a loss of information; or, ...
    • A Directional Occlusion Shading Model for Interactive Direct Volume Rendering 

      Schott, Mathias; Pegoraro, Vincent; Hansen, Charles; Boulanger, Kévin; Bouatouch, Kadi (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Volumetric rendering is widely used to examine 3D scalar fields from CT/MRI scanners and numerical simulation datasets. One key aspect of volumetric rendering is the ability to provide perceptual cues to aid in understanding ...
    • Fused Multi-Volume DVR using Binary Space Partitioning 

      Lindholm, Stefan; Ljung, Patric; Hadwiger, Markus; Ynnerman, Anders (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Multiple-volume visualization is a growing field in medical imaging providing simultaneous exploration of volumes acquired from varying modalities. However, high complexity results in an increased strain on performance ...
    • Smooth Stream Surfaces of Fourth Order Precision 

      Schneider, Dominic; Wiebel, Alexander; Scheuermann, Gerik (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      We introduce a novel technique for the construction of smooth stream surfaces of 4th order precision. While common stream surface techniques use linear interpolation for generating seed points for new streamlines in the ...
    • Hierarchical Vortex Regions in Swirling Flow 

      Petz, Christoph; Kasten, Jens; Prohaska, Steffen; Hege, Hans-Christian (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      We propose a new criterion to characterize hierarchical two-dimensional vortex regions induced by swirling motion. Central to the definition are closed loops that intersect the flow field at a constant angle. The union of ...
    • Volume Deformations in Grid-Less Flow Simulations 

      Obermaier, Harald; Hering-Bertram, Martin; Kuhnert, Jörg; Hagen, Hans (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Abstract This paper presents a novel method for the extraction and visualization of volume deformations in grid-less point based flow simulations. Our primary goals are the segmentation of different paths through a mixing ...
    • Combining Map Displays and 3D Visualizations for the Analysis of Scalar Data on Cerebral Aneurysm Surfaces 

      Neugebauer, Mathias; Gasteiger, Rocco; Beuing, Oliver; Diehl, Volker; Skalej, Martin; Preim, Bernhard (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Cerebral aneurysms result from a congenital or evolved weakness of stabilizing parts of the vessel wall and potentially lead to rupture and a life-threatening bleeding. Current medical research concentrates on the integration ...
    • Visual Analysis of Brain Activity from fMRI Data 

      Janoos, Firdaus; Nouanesengsy, Boonthanome; Machiraju, Raghu; Shen, Han Wei; Sammet, Steffen; Knopp, Michael; Mórocz, István Á. (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Classically, analysis of the time-varying data acquired during fMRI experiments is done using static activation maps obtained by testing voxels for the presence of significant activity using statistical methods. The models ...
    • SDViz: A Context-Preserving Interactive Visualization System for Technical Diagrams 

      Woo, Insoo; Kim, SungYe; Maciejewski, Ross; Ebert, David S.; Ropp, Timothy D.; Thomas, Krystal (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      When performing daily maintenance and repair tasks, technicians require access to a variety of technical diagrams. As technicians trace components and diagrams from page-to-page, within and across manuals, the contextual ...
    • Preconceptions and Individual Differences in Understanding Visual Metaphors 

      Ziemkiewicz, Caroline; Kosara, Robert (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Understanding information visualization is more than a matter of reading a series of data values; it is also a matter of incorporating a visual structure into one s own thinking about a problem. We have proposed visual ...
    • Visualization Techniques for Schedule Comparison 

      Huang, Dandan; Tory, Melanie; Staub-French, Sheryl; Pottinger, Rachel (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Project schedules are effectively represented by Gantt charts, but comparing multiple versions of a schedule is difficult. To compare versions with current methods, users must search and navigate through multiple large ...
    • Comparing Parameter Manipulation with Mouse, Pen, and Slider User Interfaces 

      Swindells, Colin; Tory, Melanie; Dreezer, Rebecca (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Visual fixation on one s tool(s) takes much attention away from one s primary task. Following the belief that the best tools disappear and become invisible to the user, we present a study comparing visual fixations (eye ...