TY - JOUR A1 - Hege, Hans-Christian A1 - Kasten, Jens A1 - Hotz, Ingrid T1 - Distillation and Visualization of Spatiotemporal Structures in Turbulent Flow Fields JF - J. Phys. Y1 - 2011 U6 - https://doi.org/10.1088/1742-6596/318/6/062009 VL - 318 SP - 062009 ET - 6 ER - TY - JOUR A1 - Kasten, Jens A1 - Reininghaus, Jan A1 - Hotz, Ingrid A1 - Hege, Hans-Christian T1 - Two-Dimensional Time-Dependent Vortex Regions Based on the Acceleration Magnitude JF - IEEE Transactions on Visualization and Computer Graphics Y1 - 2011 VL - 17 IS - 12 SP - 2080 EP - 2087target ER - TY - JOUR A1 - Reininghaus, Jan A1 - Kotava, N. A1 - Günther, David A1 - Kasten, Jens A1 - Hagen, Hans A1 - Hotz, Ingrid T1 - A Scale Space Based Persistence Measure for Critical Points in 2D Scalar Fields JF - Visualization and Computer Graphics, IEEE Transactions on Y1 - 2011 U6 - https://doi.org/10.1109/TVCG.2011.159 VL - 17 IS - 12 SP - 2045 EP - 2052 ER - TY - JOUR A1 - Günther, David A1 - Reininghaus, Jan A1 - Wagner, Hubert A1 - Hotz, Ingrid T1 - Memory-Efficient Computation of Persistent Homology for 3D Images using Discrete Morse Theory JF - Proc. Sibgrapi – Conference on Graphics, Patterns and Images Y1 - 2011 PB - Kluwer Academic Publishers ER - TY - CHAP A1 - Boyer, Edmond A1 - Bronstein, Alexander A1 - Bronstein, Michael A1 - Bustos, Benjamin A1 - Darom, Tal A1 - Horaud, Radu A1 - Hotz, Ingrid A1 - Keller, Yosi A1 - Keustermans, Johannes A1 - Kovnatsky, Artiom A1 - Litman, Roee A1 - Reininghaus, Jan A1 - Sipiran, Ivan A1 - Smeets, Dirk A1 - Suetens, Paul A1 - Vandermeulen, Dirk A1 - Zaharescu, Andrei A1 - Zobel, Valentin T1 - SHREC 2011: robust feature detection and description benchmark T2 - Proc. Eurographics 2011 Workshop on 3D Object Retrieval (3DOR’11) Y1 - 2011 U6 - https://doi.org/10.2312/3DOR/3DOR11/079-088 target SP - 71 EP - 78 PB - Eurographics Association ER - TY - CHAP A1 - Auer, Cornelia A1 - Hotz, Ingrid T1 - Complete Tensor Field Topology on 2D Triangulated Manifolds embedded in 3D T2 - Computer Graphics Forum (EuroVis’11) Y1 - 2011 VL - 30 IS - 3 target SP - 831 EP - 840 ER - TY - GEN A1 - Sreevalsan-Nair, Jaya A1 - Auer, Cornelia A1 - Hamann, Bernd A1 - Hotz, Ingrid ED - Pascucci, Valerio ED - Tricoche, Xavier ED - Hagen, Hans ED - Tierny, Julien T1 - Eigenvector-based Interpolation and Segmentation of 2D Tensor Fields T2 - Topological Methods in Data Analysis and Visualization Y1 - 2011 SN - 978-3-642-15013-5 U6 - https://doi.org/10.1007/978-3-642-15014-2_12 SP - 139 EP - 150 PB - Springer ER - TY - GEN A1 - Reininghaus, Jan A1 - Hotz, Ingrid ED - Pascucci, Valerio ED - Tricoche, Xavier ED - Hagen, Hans ED - Tierny, Julien T1 - Combinatorial 2D Vector Field Topology Extraction and Simplification T2 - Topological Methods in Data Analysis and Visualization Y1 - 2011 SN - 978-3-642-15013-5 U6 - https://doi.org/10.1007/978-3-642-15014-2_9 SP - 103 EP - 114 PB - Springer ER - TY - JOUR A1 - Zobel, Valentin A1 - Reininghaus, Jan A1 - Hotz, Ingrid T1 - Generalized Heat Kernel Signature JF - Journal of WSCG, International Conference on Computer Graphics, Visualization and Computer Vision Y1 - 2011 SP - 93 EP - 100target ER - TY - CHAP A1 - Kratz, Andrea A1 - Kettlitz, Nino A1 - Hotz, Ingrid T1 - Particle-Based Anisotropic Sampling for Two-Dimensional Tensor Field Visualization T2 - Vision Modeling and Visualization (VMV’11) Y1 - 2011 SP - 145 EP - 152 PB - Eurographics Association target ER - TY - GEN A1 - Kratz, Andrea A1 - Meyer, Björn A1 - Hotz, Ingrid ED - Hagen, Hans T1 - A Visual Approach to Analysis of Stress Tensor Fields T2 - Scientific Visualization: Interactions, Features, Metaphors Y1 - 2011 UR - http://drops.dagstuhl.de/opus/volltexte/2011/3296 U6 - https://doi.org/10.4230/DFU.Vol2.SciViz.2011.188 VL - 2 SP - 188 EP - 211 PB - Schloss Dagstuhl–Leibniz-Zentrum fuer Informatik CY - Dagstuhl, Germany ER - TY - GEN A1 - Kasten, Jens A1 - Hotz, Ingrid A1 - Noack, Bernd A1 - Hege, Hans-Christian ED - Pascucci, Valerio ED - Tricoche, Xavier ED - Hagen, Hans ED - Tierny, Julien T1 - On the Extraction of Long-living Features in Unsteady Fluid Flows T2 - Topological Methods in Data Analysis and Visualization Y1 - 2011 SN - 978-3-642-15013-5 U6 - https://doi.org/10.1007/978-3-642-15014-2_10 SP - 115 EP - 126 PB - Springer CY - Berlin ER - TY - JOUR A1 - Reininghaus, Jan A1 - Löwen, Christian A1 - Hotz, Ingrid T1 - Fast Combinatorial Vector Field Topology JF - IEEE Trans. Computer Graphics and Visualization Y1 - 2011 VL - 17 IS - 10 SP - 1433 EP - 1443 ER - TY - GEN A1 - Kratz, Andrea A1 - Reininghaus, Jan A1 - Hadwiger, Markus A1 - Hotz, Ingrid T1 - Adaptive Screen-Space Sampling for Volume Ray-Casting N2 - This work is concerned with adaptive screen-space sampling for volume ray-casting. The goal is to reduce the number of rays being cast into the scene and, thus, the overall number of sampling points. We guarantee reliable images through explicit error control using an error estimator that is founded in the field of finite element methods (FEM). FEM theory further provides a well-founded theory to prove the efficiency of the presented algorithm via convergence analysis. We, therefore, compare the convergence behavior of our method against uniform subdivisions and a refinement scheme that was presented in the context of CPU volume ray-casting. Minimizing the number of sampling points is of interest for rendering large datasets where each evaluation might need an expensive decompression. Furthermore, with increasing screen resolutions high-resolution images are created more efficiently with our method. T3 - ZIB-Report - 11-04 Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-12446 ER - TY - GEN A1 - Kratz, Andrea A1 - Hadwiger, Markus A1 - Hotz, Ingrid T1 - Improved Visual Exploration and Hybrid Rendering of Stress Tensor Fields via Shape-Space Clustering. Y1 - 2011 PB - Poster presentation at the IEEE VisWeek 2011, Providence ER - TY - GEN A1 - Kratz, Andrea A1 - Meyer, Björn A1 - Hotz, Ingrid T1 - A Visual Approach to Analysis of Stress Tensor Fields N2 - We present a visual approach for the exploration of stress tensor fields. Therefore, we introduce the idea of multiple linked views to tensor visualization. In contrast to common tensor visualization methods that only provide a single view to the tensor field, we pursue the idea of providing various perspectives onto the data in attribute and object space. Especially in the context of stress tensors, advanced tensor visualization methods have a young tradition. Thus, we propose a combination of visualization techniques domain experts are used to with statistical views of tensor attributes. The application of this concept to tensor fields was achieved by extending the notion of shape space. It provides an intuitive way of finding tensor invariants that represent relevant physical properties. Using brushing techniques, the user can select features in attribute space, which are mapped to displayable entities in a three-dimensional hybrid visualization in object space. Volume rendering serves as context, while glyphs encode the whole tensor information in focus regions. Tensorlines can be included to emphasize directionally coherent features in the tensor field. We show that the benefit of such a multi-perspective approach is manifold. Foremost, it provides easy access to the complexity of tensor data. Moreover, including wellknown analysis tools, such as Mohr diagrams, users can familiarize themselves gradually with novel visualization methods. Finally, by employing a focus-driven hybrid rendering, we significantly reduce clutter, which was a major problem of other three-dimensional tensor visualization methods. T3 - ZIB-Report - 10-26 KW - Visualisierung KW - Datenanalyse KW - Tensorfelder Y1 - 2010 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-11915 ER - TY - CHAP A1 - Reininghaus, Jan A1 - Günther, David A1 - Hotz, Ingrid A1 - Prohaska, Steffen A1 - Hege, Hans-Christian T1 - TADD: A Computational Framework for Data Analysis Using Discrete Morse Theory T2 - Mathematical Software - ICMS 2010 Y1 - 2010 U6 - https://doi.org/10.1007/978-3-642-15582-6_35 VL - 6327 SP - 198 EP - 208 PB - Springer ER - TY - CHAP A1 - Kasten, Jens A1 - Weinkauf, Tino A1 - Petz, Christoph A1 - Hotz, Ingrid A1 - Noack, Bernd R. A1 - Hege, Hans-Christian T1 - Extraction of Coherent Structures from Natural and Actuated Flows T2 - Active Flow Control II Y1 - 2010 SN - 978-3-642-11734-3 U6 - https://doi.org/10.1007/978-3-642-11735-0_24 VL - 108 SP - 373 EP - 387 PB - Springer, Berlin ER - TY - GEN A1 - Kasten, Jens A1 - Reininghaus, Jan A1 - Oberleithner, Kilian A1 - Hotz, Ingrid A1 - Noack, Bernd A1 - Hege, Hans-Christian T1 - Flow over a Cavity – Evolution of the Vortex Skeleton Y1 - 2010 PB - Visualization at 28th Annual Gallery of Fluid Motion exhibit, held at the 63th Annual Meeting of the American Physical Society, Division of Fluid Dynamics (Long Beach, CA, USA, November 21-23, 2010). ER - TY - JOUR A1 - Kasten, Jens A1 - Petz, Christoph A1 - Hotz, Ingrid A1 - Hege, Hans-Christian A1 - Noack, Bernd A1 - Tadmor, Gilead T1 - Lagrangian Feature Extraction of the Cylinder Wake JF - Physics of Fluids Y1 - 2010 U6 - https://doi.org/10.1063/1.3483220 VL - 22 IS - 9 SP - 091108 ER - TY - CHAP A1 - Hotz, Ingrid A1 - Sreevalsan-Nair, Jaya A1 - Hamann, Bernd ED - Hagen, Hans T1 - Tensor Field Reconstruction Based on Eigenvector and Eigenvalue Interpolation T2 - Scientific Visualization: Advanced Concepts Y1 - 2010 UR - http://drops.dagstuhl.de/opus/volltexte/2010/2700 SN - 978-3-939897-19-4 U6 - https://doi.org/10.4230/DFU.SciViz.2010.110 VL - 1 SP - 110 EP - 123 PB - Schloss Dagstuhl Leibniz-Zentrum fuer Informatik ER - TY - CHAP A1 - Rosanwo, Olufemi A1 - Petz, Christoph A1 - Prohaska, Steffen A1 - Hotz, Ingrid A1 - Hege, Hans-Christian ED - Eades, Peter ED - Ertl, Thomas ED - Shen, Han-Wei T1 - Dual Streamline Seeding T2 - Proceedings of the IEEE Pacific Visualization Symposium Y1 - 2009 SP - 9 EP - 16 CY - Beijing, China ER - TY - CHAP A1 - Hege, Hans-Christian A1 - Hotz, Ingrid A1 - Munzner, Tamara T1 - Euro Vis 2009 - Eurographics/IEEE-VGTC Symposium on Visualization T2 - Comput. Graphics. Forum Y1 - 2009 N1 - Preface of Proceedings VL - 28 ER - TY - CHAP A1 - Auer, Cornelia A1 - Sreevalsan-Nair, Jaya A1 - Zobel, Valentin A1 - Hotz, Ingrid ED - Hagen, Hans T1 - 2D Tensor Field Segmentation T2 - Scientific Visualization: Interactions, Features, Metaphors Y1 - 2009 U6 - https://doi.org/10.4230/DFU.Vol2.SciViz.2011.17 VL - 2 SP - 17 EP - 35 PB - Schloss Dagstuhl–Leibniz-Zentrum für Informatik ER - TY - CHAP A1 - Kasten, Jens A1 - Petz, Christoph A1 - Hotz, Ingrid A1 - Noack, Bernd R. A1 - Hege, Hans-Christian ED - Magnor, Marcus ED - Rosenhahn, Bodo ED - Theisel, Holger T1 - Localized Finite-time Lyapunov Exponent for Unsteady Flow Analysis T2 - Vision Modeling and Visualization Y1 - 2009 SN - 978-3-9804874-8-1 VL - 1 SP - 265 EP - 274 PB - Universität Magdeburg, Inst. f. Simulation u. Graph. ER - TY - GEN A1 - Rosanwo, Olufemi A1 - Petz, Christoph A1 - Prohaska, Steffen A1 - Hotz, Ingrid A1 - Hege, Hans-Christian T1 - Dual Streamline Seeding - Method and Implementation N2 - This work introduces a novel streamline seeding technique based on dual streamlines that are orthogonal to the vector field, instead of tangential. The greedy algorithm presented here produces a net of orthogonal streamlines that is iteratively refined resulting in good domain coverage and a high degree of continuity and uniformity. The algorithm is easy to implement and efficient, and it naturally extends to curved surfaces. N2 - In dieser Arbeit wird eine neue Strategie zur Platzierung von Stromlinien vorgestellt. Hierzu werden zusätzliche duale Stromlinien verwendet, die --im Gegensatz zur üblichen Definition-- orthogonal zum Vektorfeld verlaufen. Der vorgestellte Greedy-Algorithmus berechnet ein Netz aus orthogonalen Stromlinien, welches iterativ verfeinert wird, was zu einer guten Abdeckung der Domäne und einer gleichmäßigen Verteilung der Stromlinien führt. Es handelt sich um einen einfach zu implementierenden und effizienten Algorithmus, der direkt auf gekrümmten Oberflächen anwendbar ist. T3 - ZIB-Report - 08-49 Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-11032 SN - 1438-0064 ER -