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Displaying 1-50 out of 67 total
VAICo: Visual Analysis for Image Comparison
Found in: IEEE Transactions on Visualization and Computer Graphics
By Johanna Schmidt,M. Eduard Groller,Stefan Bruckner
Issue Date:December 2013
pp. 2090-2099
Scientists, engineers, and analysts are confronted with ever larger and more complex sets of data, whose analysis poses special challenges. In many situations it is necessary to compare two or more datasets. Hence there is a need for comparative visualizat...
 
A Model for Structure-Based Comparison of Many Categories in Small-Multiple Displays
Found in: IEEE Transactions on Visualization and Computer Graphics
By Johannes Kehrer,Harald Piringer,Wolfgang Berger,M. Eduard Groller
Issue Date:December 2013
pp. 2287-2296
Many application domains deal with multi-variate data that consist of both categorical and numerical information. Smallmultiple displays are a powerful concept for comparing such data by juxtaposition. For comparison by overlay or by explicit encoding of c...
 
Vessel Visualization using Curved Surface Reformation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Thomas Auzinger,Gabriel Mistelbauer,Ivan Baclija,Rudiger Schernthaner,Arnold Kochl,Michael Wimmer,M. Eduard Groller,Stefan Bruckner
Issue Date:December 2013
pp. 2858-2867
Visualizations of vascular structures are frequently used in radiological investigations to detect and analyze vascular diseases. Obstructions of the blood flow through a vessel are one of the main interests of physicians, and several methods have been pro...
 
MObjects--A Novel Method for the Visualization and Interactive Exploration of Defects in Industrial XCT Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Andreas Reh,Christian Gusenbauer,Johann Kastner,M. Eduard Groller,Christoph Heinzl
Issue Date:December 2013
pp. 2906-2915
This paper describes an advanced visualization method for the analysis of defects in industrial 3D X-Ray Computed Tomography (XCT) data. We present a novel way to explore a high number of individual objects in a dataset, e.g., pores, inclusions, particles,...
 
Interactive Volume Visualization of General Polyhedral Grids
Found in: IEEE Transactions on Visualization and Computer Graphics
By Philipp Muigg,Markus Hadwiger,Helmut Doleisch,Eduard Gröller
Issue Date:December 2011
pp. 2115-2124
This paper presents a novel framework for visualizing volumetric data specified on complex polyhedral grids, without the need to perform any kind of a priori tetrahedralization. These grids are composed of polyhedra that often are non-convex and have an ar...
 
Projection-Based Metal-Artifact Reduction for Industrial 3D X-ray Computed Tomography
Found in: IEEE Transactions on Visualization and Computer Graphics
By Artem Amirkhanov,Christoph Heinzl,Michael Reiter,Johann Kastner,Eduard Gröller
Issue Date:December 2011
pp. 2193-2202
Multi-material components, which contain metal parts surrounded by plastic materials, are highly interesting for inspection using industrial 3D X-ray computed tomography (3DXCT). Examples of this application scenario are connectors or housings with metal i...
 
Interactive Virtual Probing of 4D MRI Blood-Flow
Found in: IEEE Transactions on Visualization and Computer Graphics
By Roy van Pelt,Javier Olivan Bescos,Marcel Breeuwer,Rachel E. Clough,M. Eduard Gröller,Bart ter Haar Romenij,Anna Vilanova
Issue Date:December 2011
pp. 2153-2162
Better understanding of hemodynamics conceivably leads to improved diagnosis and prognosis of cardiovascular diseases. Therefore, an elaborate analysis of the blood-flow in heart and thoracic arteries is essential. Contemporary MRI techniques enable acquis...
 
Volume Analysis Using Multimodal Surface Similarity
Found in: IEEE Transactions on Visualization and Computer Graphics
By Martin Haidacher,Stefan Bruckner,Eduard Gröller
Issue Date:December 2011
pp. 1969-1978
The combination of volume data acquired by multiple modalities has been recognized as an important but challenging task. Modalities often differ in the structures they can delineate and their joint information can be used to extend the classification space...
 
World Lines
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jürgen Waser, Raphael Fuchs, Hrvoje Ribicic, Benjamin Schindler, Günther Blöschl, Eduard Gröller
Issue Date:November 2010
pp. 1458-1467
In this paper we present World Lines as a novel interactive visualization that provides complete control over multiple heterogeneous simulation runs. In many application areas, decisions can only be made by exploring alternative scenarios. The goal of the ...
 
Exploration of 4D MRI Blood Flow using Stylistic Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Roy van Pelt, Javier Oliván Bescós, Marcel Breeuwer, Rachel E. Clough, M. Eduard Gröller, Bart ter Haar Romenij, Anna Vilanova
Issue Date:November 2010
pp. 1339-1347
Insight into the dynamics of blood-flow considerably improves the understanding of the complex cardiovascular system and its pathologies. Advances in MRI technology enable acquisition of 4D blood-flow data, providing quantitative blood-flow velocities over...
 
A Visual Approach to Efficient Analysis and Quantification of Ductile Iron and Reinforced Sprayed Concrete
Found in: IEEE Transactions on Visualization and Computer Graphics
By Laura Fritz, Markus Hadwiger, Georg Geier, Gerhard Pittino, M. Eduard Gröller
Issue Date:November 2009
pp. 1343-1350
This paper describes advanced volume visualization and quantification for applications in non-destructive testing (NDT), which results in novel and highly effective interactive workflows for NDT practitioners. We employ a visual approach to explore and qua...
 
BrainGazer - Visual Queries for Neurobiology Research
Found in: IEEE Transactions on Visualization and Computer Graphics
By Stefan Bruckner, Veronika Šoltészová, Eduard Gröller, Jiří Hladůvka, Katja Bühler, Jai Y. Yu, Barry J. Dickson
Issue Date:November 2009
pp. 1497-1504
Neurobiology investigates how anatomical and physiological relationships in the nervous system mediate behavior. Molecular genetic techniques, applied to species such as the common fruit fly Drosophila melanogaster, have proven to be an important tool in t...
 
Visualization of Myocardial Perfusion Derived from Coronary Anatomy
Found in: IEEE Transactions on Visualization and Computer Graphics
By Maurice Termeer, Javier Oliván Bescós, Marcel Breeuwer, Anna Vilanova, Frans Gerritsen, M. Eduard Gröller, Eike Nagel
Issue Date:November 2008
pp. 1595-1602
Visually assessing the effect of the coronary artery anatomy on the perfusion of the heart muscle in patients with coronary artery disease remains a challenging task. We explore the feasibility of visualizing this effect on perfusion using a numerical appr...
 
Surface Extraction from Multi-Material Components for Metrology using Dual Energy CT
Found in: IEEE Transactions on Visualization and Computer Graphics
By Christoph Heinzl, Johann Kastner, Eduard Gröller
Issue Date:November 2007
pp. 1520-1527
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 tom...
 
LiveSync: Deformed Viewing Spheres for Knowledge-Based Navigation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Peter Kohlmann, Stefan Bruckner, Armin Kanitsar, Eduard Gröller
Issue Date:November 2007
pp. 1544-1551
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 paramete...
 
CoViCAD: Comprehensive Visualization of Coronary Artery Disease
Found in: IEEE Transactions on Visualization and Computer Graphics
By Maurice Termeer, Javier Oliván Bescós, Marcel Breeuwer, Anna Vilanova, Frans Gerritsen, Eduard Gröller
Issue Date:November 2007
pp. 1632-1639
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 discontinuiti...
 
Semantic Layers for Illustrative Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Peter Rautek, Stefan Bruckner, Eduard Gröller
Issue Date:November 2007
pp. 1336-1343
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 exper...
 
Caricaturistic Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Peter Rautek,Ivan Viola,M. Eduard Gröller
Issue Date:September 2006
pp. 1085-1092
Exploded views are an illustration technique where an object is partitioned into several segments. These segments are displaced to reveal otherwise hidden detail. In this paper we apply the concept of exploded views to volumetric data in order to solve the...
 
Exploded Views for Volume Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Stefan Bruckner,M. Eduard Gröller
Issue Date:September 2006
pp. 1077-1084
Exploded views are an illustration technique where an object is partitioned into several segments. These segments are displaced to reveal otherwise hidden detail. In this paper we apply the concept of exploded views to volumetric data in order to solve the...
 
Guest Editors' Introduction: Special Section on IEEE Visualization Applications
Found in: IEEE Transactions on Visualization and Computer Graphics
By Eduard Groller, Kwan-Liu Ma, Klaus Mueller
Issue Date:September 2005
pp. 483-484
No summary available.
 
Keynotes
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Klaus Mueller,Eduard Groller
Issue Date:March 2014
pp. xix-xx
These keynotes speeches discuss the following: Expanding the Universe- From Volume Rendering to High-Dimensional Data Visualization; Comparative Visualization.
   
Unified Boundary-Aware Texturing for Interactive Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By T. Ropinski,S. Diepenbrock,S. Bruckner,K. Hinrichs,Eduard Groller
Issue Date:November 2012
pp. 1942-1955
In this paper, we describe a novel approach for applying texture mapping to volumetric data sets. In contrast to previous approaches, the presented technique enables a unified integration of 2D and 3D textures and thus allows to emphasize material boundari...
 
Centerline reformations of complex vascular structures
Found in: Visualization Symposium, IEEE Pacific
By Gabriel Mistelbauer,Andrej Varchola,Hamed Bouzari,Juraj Starinsky,Arnold Kochl,Rudiger Schernthaner,Dominik Fleischmann,Meister Eduard Groller,Milos Sramek
Issue Date:March 2012
pp. 233-240
Visualization of vascular structures is a common and frequently performed task in the field of medical imaging. There exist well established and applicable methods such as Maximum Intensity Projection (MIP) and Curved Planar Reformation (CPR). However, whe...
 
Nodes on Ropes: A Comprehensive Data and Control Flow for Steering Ensemble Simulations
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jürgen Waser,Hrvoje Ribičić,Raphael Fuchs,Christian Hirsch,Benjamin Schindler,Günther Blöschl,Eduard Gröller
Issue Date:December 2011
pp. 1872-1881
Flood disasters are the most common natural risk and tremendous efforts are spent to improve their simulation and management. However, simulation-based investigation of actions that can be taken in case of flood emergencies is rarely done. This is in part ...
 
Visual Optimality and Stability Analysis of 3DCT Scan Positions
Found in: IEEE Transactions on Visualization and Computer Graphics
By Artem Amirkhanov, Christoph Heinzl, Michael Reiter, Eduard Gröller
Issue Date:November 2010
pp. 1477-1486
Industrial cone-beam X-Ray computed tomography (CT) systems often face problems due to artifacts caused by a bad placement of the specimen on the rotary plate. This paper presents a visual-analysis tool for CT systems, which provides a simulation-based pre...
 
Comparative Visualization for Parameter Studies of Dataset Series
Found in: IEEE Transactions on Visualization and Computer Graphics
By Muhammad Muddassir Malik, Christoph Heinzl, M. Eduard Gröller
Issue Date:September 2010
pp. 829-840
This paper proposes comparison and visualization techniques to carry out parameter studies for the special application area of dimensional measurement using 3D X-ray computed tomography (3DCT). A dataset series is generated by scanning a specimen multiple ...
 
Visual Human+Machine Learning
Found in: IEEE Transactions on Visualization and Computer Graphics
By Raphael Fuchs, Jürgen Waser, Meister Eduard Gröller
Issue Date:November 2009
pp. 1327-1334
In this paper we describe a novel method to integrate interactive visual analysis and machine learning to support the insight generation of the user. The suggested approach combines the vast search and processing power of the computer with the superior rea...
 
Contextual picking of volumetric structures
Found in: Visualization Symposium, IEEE Pacific
By Peter Kohlmann, Stefan Bruckner, Armin Kanitsar, M. Eduard Groller
Issue Date:April 2009
pp. 185-192
This paper presents a novel method for the interactive identification of contextual interest points within volumetric data by picking on a direct volume rendered image. In clinical diagnostics the points of interest are often located in the center of anato...
 
Event Tunnel: Exploring Event-Driven Business Processes
Found in: IEEE Computer Graphics and Applications
By Martin Suntinger, Hannes Obweger, Josef Schiefer, M. Eduard Gröller
Issue Date:September 2008
pp. 46-55
Event-based systems monitor business processes in real time. The event-tunnel visualization sees the stream of events captured from such systems as a cylindrical tunnel. The tunnel allows for back-tracing business incidents and exploring event patterns' ro...
 
Enhancing Depth-Perception with Flexible Volumetric Halos
Found in: IEEE Transactions on Visualization and Computer Graphics
By Stefan Bruckner, Eduard Gröller
Issue Date:November 2007
pp. 1344-1351
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 em...
 
Illustrative Context-Preserving Exploration of Volume Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Stefan Bruckner, Sören Grimm, Armin Kanitsar, M. Eduard Gröller
Issue Date:November 2006
pp. 1559-1569
<p><b>Abstract</b>—In volume rendering, it is very difficult to simultaneously visualize interior and exterior structures while preserving clear shape cues. Highly transparent transfer functions produce cluttered images with many overlapp...
 
Importance-Driven Focus of Attention
Found in: IEEE Transactions on Visualization and Computer Graphics
By Ivan Viola,Miquel Feixas,Mateu Sbert,Meister Eduard Gröller
Issue Date:September 2006
pp. 933-940
This paper introduces a concept for automatic focusing on features within a volumetric data set. The user selects a focus, i.e., object of interest, from a set of pre-defined features. Our system automatically determines the most expressive view on this fe...
 
Guest Editorial: Special Section on Visualization 2005
Found in: IEEE Transactions on Visualization and Computer Graphics
By Cláudio T. Silva, Eduard Gröller, Holly Rushmeier
Issue Date:July 2006
pp. 419-420
No summary available.
 
Profile Flags: a Novel Metaphor for Probing of T2 Maps
Found in: Visualization Conference, IEEE
By Matej Mlejnek, Pierre Ermes, Anna Vilanova, Rob van der Rijt, Harrie vna den Bosch, Frans Gerritsen, Meister Eduard Groller
Issue Date:October 2005
pp. 76
This paper describes a tool for the visualization of T2 maps of knee cartilage. Given the anatomical scan and the T2 map of the cartilage, we combine the information on the shape and the quality of the cartilage in a single image. The Profile Flag is an in...
 
VolumeShop: An Interactive System for Direct Volume Illustration
Found in: Visualization Conference, IEEE
By Stefan Bruckner, M. Eduard Groller
Issue Date:October 2005
pp. 85
Illustrations play a major role in the education process. Whether used to teach a surgical or radiologic procedure, to illustrate normal or aberrant anatomy, or to explain the functioning of a technical device, illustration significantly impacts learning. ...
 
A Sky Dome Visualisation for Identification of Astronomical Orientations
Found in: Information Visualization, IEEE Symposium on
By Georg Zotti, Meister Eduard Groller
Issue Date:October 2005
pp. 2
<p>It has long been known that ancient temples were frequently oriented along the cardinal directions or to certain points along the horizon where Sun or Moon rise or set on special days of the year. In the last decades, archaeologists have found evi...
 
Importance-Driven Feature Enhancement in Volume Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Ivan Viola, Armin Kanitsar, M. Eduard Gröller
Issue Date:July 2005
pp. 408-418
This paper presents importance-driven feature enhancement as a technique for the automatic generation of cut-away and ghosted views out of volumetric data. The presented focus+context approach removes or suppresses less important parts of a scene to reveal...
 
The VesselGlyph: Focus & Context Visualization in CT-Angiography
Found in: Visualization Conference, IEEE
By Matúš Straka, Michal Červeňanský, Alexandra La Cruz, Arnold Köchl, Miloš Šrámek, Eduard Gröller, Dominik Fleischmann
Issue Date:October 2004
pp. 385-392
<p>Accurate and reliable visualization of blood vessels is still a challenging problem, notably in the presence of morphologic changes resulting from atherosclerotic diseases. In this paper we take advantage of partially segmented data with approxima...
 
Memory Efficient Acceleration Structures and Techniques for CPU-Based Volume Raycasting of Large Data
Found in: Volume Visualization and Graphics, IEEE Symposium on
By Sören Grimm, Stefan Bruckner, Armin Kanitsar, Eduard Gröller
Issue Date:October 2004
pp. 1-8
Most CPU-based volume raycasting approaches achieve high performance by advanced memory layouts, space subdivision, and excessive pre-computing. Such approaches typically need an enormous amount of memory. They are limited to sizes which do not satisfy the...
 
Importance-Driven Volume Rendering
Found in: Visualization Conference, IEEE
By Ivan Viola, Armin Kanitsar, Meister Eduard Gröller
Issue Date:October 2004
pp. 139-146
<p>This paper introduces importance-driven volume rendering as a novel technique for automatic focus and context display of volumetric data. Our technique is a generalization of cut-away views, which — depending on the viewpoint — remove or suppress ...
 
Interactive Thickness Visualization of Articular Cartilage
Found in: Visualization Conference, IEEE
By Matej Mlejnek, Anna Vilanova, Meister Eduard Gröller
Issue Date:October 2004
pp. 521-528
This paper describes a method to visualize the thickness of curved thin objects. Given the MRI volume data of articular cartilage, medical doctors investigate pathological changes of the thickness. Since the tissue is very thin, it is impossible to reliabl...
 
Advanced Curved Planar Reformation: Flattening of Vascular Structures
Found in: Visualization Conference, IEEE
By Armin Kanitsar, Rainer Wegenkittl, Dominik Fleischmann, Meister Eduard Gröller
Issue Date:October 2003
pp. 7
Traditional volume visualization techniques may provide incomplete clinical information needed for applications in medical visualization. In the area of vascular visualization important features such as the lumen of a diseased vessel segment may not be vis...
 
Hardware-Based Nonlinear Filtering and Segmentation using High-Level Shading Languages
Found in: Visualization Conference, IEEE
By Ivan Viola, Armin Kanitsar, Meister Eduard Gröller
Issue Date:October 2003
pp. 41
Non-linear filtering is an important task for volume analysis. This paper presents hardware-based implementations of various non-linear filters for volume smoothing with edge preservation. The Cg high-level shading language is used in combination with late...
 
Process Visualization with Levels of Detail
Found in: Information Visualization, IEEE Symposium on
By Krešimir Matković, Helwig Hauser, Reinhard Sainitzer, M. Eduard Gröller
Issue Date:October 2002
pp. 67
In this paper we demonstrate how we apply information visualization techniques to process monitoring. Virtual instruments are enhanced using history encoding — instruments are capable of displaying the current value and the value from the near past. Multi-...
 
CPR - Curved Planar Reformation
Found in: Visualization Conference, IEEE
By Armin Kanitsar, Dominik Fleischmann, Rainer Wegenkittl, Petr Felkel, Meister Eduard Gröller
Issue Date:November 2002
pp. N/A
Visualization of tubular structures such as blood vessels is an important topic in medical imaging. One way to display tubular structures for diagnostic purposes is to generate longitudinal cross-sections in order to show their lumen, wall, and surrounding...
 
Optimal Regular Volume Sampling
Found in: Visualization Conference, IEEE
By Thomas Theußl, Torsten Möller, Meister Eduard Gröller
Issue Date:October 2001
pp. N/A
The classification of volumetric data sets as well as their rendering algorithms are typically based on the representation of the underlying grid. Grid structures based on a Cartesian lattice are the de-facto standard for regular representations of volumet...
 
Computed Tomography Angiography: A Case Study of Peripheral Vessel Investigation
Found in: Visualization Conference, IEEE
By Armin Kanitsar, Rainer Wegenkittl, Petr Felkel, Dominik Fleischmann, Dominique Sandner, Eduard Gröller
Issue Date:October 2001
pp. N/A
This paper deals with vessel exploration based on computed tomography angiography. Large image sequences of the lower extremities are investigated in a clinical environment. Two different approaches for peripheral vessel diagnosis dealing with stenosis and...
 
Nonlinear Virtual Colon Unfolding
Found in: Visualization Conference, IEEE
By Anna Vilanova Bartroli, Rainer Wegenkittl, Andreas Konig, Eduard Groller
Issue Date:October 2001
pp. N/A
The majority of virtual endoscopy techniques tries to simulate a real endoscopy. A real endoscopy does not always give the optimal information due to the physical limitations it is subject to. In this paper, we deal with the unfolding of the surface of the...
 
Two-Level Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Helwig Hauser,Lukas Mroz,Gian Italo Bischi,M. Eduard Gröller
Issue Date:July 2001
pp. 242-252
Abstract—In this paper, we present a two-level approach for volume rendering, i.e., two-level volume rendering, which allows for selectively using different rendering techniques for different subsets of a 3D data set. Different structures within the data s...
 
Perspective Projection through Parallel Projected Slabs for Virtual Endoscopy
Found in: Computer Graphics, Spring Conference on
By Anna Vilanova, Eduard Gröller, Rainer Wegenkittl, Andreas König
Issue Date:April 2001
pp. 0241
Abstract: Virtual Endoscopy is a promising medical application for volume rendering techniques where perspective projection is mandatory. Most of the acceleration techniques for direct volume rendering make use of parallel projection. This is also the case...
 
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