Topological Analysis

Excerpt (Random Selection):

R. Fuchs, J. Kemmler, B. Schindler, J. Waser, F. Sadlo, H. Hauser, R. Peikert:

Toward a Lagrangian Vector Field Topology

Computer Graphics Forum, vol. 29, no. 3, pp. 1163–1172, 2010.


Abstract In this paper we present an extended critical point concept which allows us to apply vector field topology in the case of unsteady flow. We propose a measure for unsteadiness which describes the rate of change of the velocities in a fluid element over time. This measure allows us to select particles for which topological properties remain intact inside a finite spatio-temporal neighborhood. One benefit of this approach is that the classification of critical points based on the eigenvalues of the Jacobian remains meaningful. In the steady case the proposed criterion reduces to the classical definition of critical points. As a first step we show that finding an optimal Galilean frame of reference can be obtained implicitly by analyzing the acceleration field. In a second step we show that this can be extended by switching to the Lagrangian frame of reference. This way the criterion can detect critical points moving along intricate trajectories. We analyze the behavior of the proposed criterion based on two analytical vector fields for which a correct solution is defined by their inherent symmetries and present results for numerical vector fields.
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Publications

To Appear
Reviewed Conference Papers
	B. Rieck, M. Banagl, F. Sadlo, H. Leitte: Persistent Intersection Homology for the Analysis of Discrete Data In Topological Methods in Data Analysis and Visualization V, Springer International Publishing, to appear. Available files: [BibTeX]
	B. Rieck, F. Sadlo, H. Leitte: Topological Machine Learning with Persistence Indicator Functions In Topological Methods in Data Analysis and Visualization V, Springer International Publishing, to appear. Available files: [BibTeX]
	B. Rieck, F. Sadlo, H. Leitte: Hierarchies and Ranks for Persistence Pairs In Topological Methods in Data Analysis and Visualization V, Springer International Publishing, to appear. Available files: [BibTeX]
	B. Rieck, F. Sadlo, H. Leitte: Persistence Concepts for 2D Skeleton Evolution Analysis In Topological Methods in Data Analysis and Visualization V, Springer International Publishing, to appear. Available files: [BibTeX]
2018
Reviewed Journal Papers
	L. Hofmann, B. Rieck, F. Sadlo: Visualization of 4D Vector Field Topology Computer Graphics Forum, vol. 37, no. 3, pp. 301–313, 2018. Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Video] [Video] [Slides] [Details]
	B. Rieck, U. Fugacci, J. Lukasczyk, H. Leitte: Clique Community Persistence: A Topological Visual Analysis Approach for Complex Networks IEEE Transactions on Visualization and Computer Graphics, vol. 24, no. 1, pp. 822–831, 2018. Available files: [BibTeX] [DOI] [PDF] [Details]
Reviewed Conference Papers
	K. Hanser, O. Klein, B. Rieck, B. Wiebe, T. Selz, M. Piatkowski, A. Sagristà, B. Zheng, M. Lukácová, G. Craig, H. Leitte, F. Sadlo: Visualization of Parameter Sensitivity of 2D Time-Dependent Flow In Lecture Notes in Computer Science: Advances in Visual Computing (Proceedings of International Symposium on Visual Computing), pp. 359–370, 2018. Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Slides] [Details]
2017
Reviewed Journal Papers
	A. Sagristà, S. Jordan, A. Just, F. Dias, L. G. Nonato, F. Sadlo: Topological Analysis of Inertial Dynamics IEEE Transactions on Visualization and Computer Graphics, vol. 23, no. 1, pp. 950–959, 2017. Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Technical Addendum] [Video] [Details]
Reviewed Conference Papers
	R. Peikert, G. M. Machado, F. Sadlo: Topological Extraction of Escape Maps in Divergence-Free Vector Fields In Topological Methods in Data Analysis and Visualization IV, Springer International Publishing, pp. 171–186, 2017. Available files: [BibTeX] [DOI] [Details]
2016
Reviewed Journal Papers
	G. M. Machado, S. Boblest, T. Ertl, F. Sadlo: Space-Time Bifurcation Lines for Extraction of 2D Lagrangian Coherent Structures Computer Graphics Forum, vol. 35, no. 3, pp. 91–100, 2016. Available files: [BibTeX] [DOI] [PDF] [Details]
	B. Rieck, H. Leitte: Exploring and Comparing Clusterings of Multivariate Data Sets Using Persistent Homology Computer Graphics Forum, vol. 35, no. 3, pp. 81–90, 2016. Available files: [BibTeX] [DOI] [PDF]
Reviewed Conference Papers
	B. Rieck, H. Leitte: Shall I compare thee to a network? -- Visualizing the Topological Structure of Shakespeare's Plays In Proceedings of Workshop on Visualization for the Digital Humanities at IEEE VIS, 2016. Available files: [BibTeX] [DOI] [PDF]
2015
Reviewed Journal Papers
	T. Müller, F. Sadlo: Visual Exploration of 2D Autonomous Dynamical Systems European Journal of Physics, vol. 36, no. 3, pp. 035007, 2015. Available files: [BibTeX] [DOI] [Details]
Reviewed Conference Papers
	F. Sadlo: Lyapunov Time for 2D Lagrangian Visualization In Topological and Statistical Methods for Complex Data, Springer Berlin Heidelberg, pp. 167–181, 2015. Available files: [BibTeX] [DOI] [PDF] [Details]
2014
Reviewed Journal Papers
	G. M. Machado, F. Sadlo, T. Müller, T. Ertl: Escape Maps IEEE Transactions on Visualization and Computer Graphics, vol. 20, no. 12, pp. 2604–2613, 2014. Available files: [BibTeX] [DOI] [PDF] [Highres PDF] [Details]
Reviewed Conference Papers
	R. Peikert, A. Pobitzer, F. Sadlo, B. Schindler: A Comparison of Finite-Time and Finite-Size Lyapunov Exponents In Topological Methods in Data Analysis and Visualization III, Springer International Publishing, pp. 187–200, 2014. Available files: [BibTeX] [DOI] [PDF] [Details]
	B. Rieck, H. Leitte: Enhancing Comparative Model Analysis Using Persistent Homology In Proceedings of Workshop on Visualization for Predictive Analytics at IEEE VIS, 2014. Available files: [BibTeX] [PDF]
	F. Sadlo, G. K. Karch, T. Ertl: Topological Features in Time-Dependent Advection-Diffusion Flow In Topological Methods in Data Analysis and Visualization III, Springer International Publishing, pp. 217–231, 2014. Available files: [BibTeX] [DOI] [PDF] [Details]
2013
Reviewed Journal Papers
	M. Üffinger, F. Sadlo, T. Ertl: A Time-Dependent Vector Field Topology Based on Streak Surfaces IEEE Transactions on Visualization and Computer Graphics, vol. 19, no. 3, pp. 379–392, 2013. Available files: [BibTeX] [DOI] [PDF] [Video] [Video] [Details]
	M. Hlawatsch, F. Sadlo, D. Weiskopf: Predictability-Based Adaptive Mouse Interaction and Zooming for Visual Flow Exploration International Journal for Uncertainty Quantification, vol. 3, no. 3, pp. 225–240, 2013. Available files: [BibTeX] [DOI] [PDF] [Details]
Reviewed Conference Papers
	G. M. Machado, F. Sadlo, T. Ertl: Local Extraction of Bifurcation Lines In Proceedings of International Workshop on Vision, Modeling and Visualization (VMV), pp. 17–24, 2013. Available files: [BibTeX] [DOI] [PDF] [Details]
	F. Sadlo, S. Bachthaler, C. Dachsbacher, D. Weiskopf: Space-Time Flow Visualization of Dynamics in 2D Lagrangian Coherent Structures In Computer Vision, Imaging and Computer Graphics. Theory and Application, Springer Berlin Heidelberg, pp. 145–159, 2013. Available files: [BibTeX] [DOI] [Details]
2012
Reviewed Journal Papers
	S. Bachthaler, F. Sadlo, R. Weeber, S. Kantorovich, C. Holm, D. Weiskopf: Magnetic Flux Topology of 2D Point Dipoles Computer Graphics Forum, vol. 31, no. 3, pp. 955–964, 2012. Available files: [BibTeX] [DOI] [PDF] [Details]
	B. Rieck, H. Mara, H. Leitte: Multivariate Data Analysis Using Persistence-based Filtering and Topological Signatures IEEE Transactions on Visualization and Computer Graphics, vol. 18, no. 12, pp. 2382–2391, 2012. Available files: [BibTeX] [DOI] [PDF]
Reviewed Conference Papers
	M. Üffinger, F. Sadlo, M. Kirby, C. Hansen, T. Ertl: FTLE Computation Beyond First-Order Approximation In Short Paper Proceedings of Eurographics 2012, pp. 61–64, 2012. Available files: [BibTeX] [DOI] [PDF] [Details]
	S. Bachthaler, F. Sadlo, C. Dachsbacher, D. Weiskopf: Space-Time Visualization of Dynamics in Lagrangian Coherent Structures of Time-Dependent 2D Vector Fields In Proceedings of International Conference on Information Visualization Theory and Applications (IVAPP), pp. 573–583, 2012. Available files: [BibTeX] [PDF] [Details]
	A. Panagiotidis, D. Kauker, F. Sadlo, T. Ertl: Distributed Computation and Large-Scale Visualization in Heterogeneous Compute Environments In Proceedings of 11th International Symposium on Parallel and Distributed Computing (ISPDC), pp. 87–94, 2012. Available files: [BibTeX] [DOI] [Details]
	F. Sadlo, M. Üffinger, T. Ertl, D. Weiskopf: On the Finite-Time Scope for Computing Lagrangian Coherent Structures from Lyapunov Exponents In Topological Methods in Data Analysis and Visualization II, Springer Berlin Heidelberg, pp. 269–281, 2012. Available files: [BibTeX] [DOI] [PDF] [Slides] [Details]
2011
Reviewed Journal Papers
	M. Hlawatsch, J. Vollrath, F. Sadlo, D. Weiskopf: Coherent Structures of Characteristic Curves in Symmetric Second Order Tensor Fields IEEE Transactions on Visualization and Computer Graphics, vol. 17, no. 6, pp. 781–794, 2011. Available files: [BibTeX] [DOI] [PDF] [Details]
Reviewed Conference Papers
	M. Ament, S. Frey, F. Sadlo, T. Ertl, D. Weiskopf: GPU-Based Two-Dimensional Flow Simulation Steering using Coherent Structures In Proceedings of the Second International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering, 2011. Available files: [BibTeX] [DOI] [PDF]
	F. Sadlo, A. Rigazzi, R. Peikert: Time-Dependent Visualization of Lagrangian Coherent Structures by Grid Advection In Topological Methods in Data Analysis and Visualization, Springer Berlin Heidelberg, pp. 151–165, 2011. Available files: [BibTeX] [DOI] [PDF] [Slides] [Details]
2010
Reviewed Journal Papers
	R. Fuchs, J. Kemmler, B. Schindler, J. Waser, F. Sadlo, H. Hauser, R. Peikert: Toward a Lagrangian Vector Field Topology Computer Graphics Forum, vol. 29, no. 3, pp. 1163–1172, 2010. Available files: [BibTeX] [DOI] [PDF] [Details]
	R. Peikert, F. Sadlo: A Robust Stream Surface Method for the Visualization of Vector Field Singularities Computer Graphics and Geometry, vol. 12, no. 2, pp. 2–13, 2010. Available files: [BibTeX] [URL]
	F. Sadlo, D. Weiskopf: Time-Dependent 2-D Vector Field Topology: An Approach Inspired by Lagrangian Coherent Structures Computer Graphics Forum, vol. 29, no. 1, pp. 88–100, 2010. Available files: [BibTeX] [DOI] [PDF] [Slides] [Details]
Conference Papers with Reviewed Abstract
	M. Falk, A. Seizinger, M. Üffinger, F. Sadlo, D. Weiskopf: Trajectory-Augmented Visualization of Lagrangian Coherent Structures in Unsteady Flow In Proceedings of International Symposium on Flow Visualization (ISFV14), 2010. Available files: [BibTeX] [PDF]
2009
Reviewed Conference Papers
	R. Peikert, F. Sadlo: Flow Topology Beyond Skeletons: Visualization of Features in Recirculating Flow In Topology-Based Methods in Visualization II, Springer Berlin Heidelberg, pp. 145–160, 2009. Available files: [BibTeX] [DOI] [PDF] [Details]
	R. Peikert, F. Sadlo: Topologically Relevant Stream Surfaces for Flow Visualization In Proceedings of 2009 Spring Conference on Computer Graphics, pp. 35–42, 2009. Available files: [BibTeX] [DOI] [PDF] [Details]
	F. Sadlo, R. Peikert: Visualizing Lagrangian Coherent Structures and Comparison to Vector Field Topology In Topology-Based Methods in Visualization II, Springer Berlin Heidelberg, pp. 15–29, 2009. Available files: [BibTeX] [DOI] [PDF] [Details]
2007
Reviewed Journal Papers
	F. Sadlo, R. Peikert: Efficient Visualization of Lagrangian Coherent Structures by Filtered AMR Ridge Extraction IEEE Transactions on Visualization and Computer Graphics, vol. 13, no. 6, pp. 1456–1463, 2007. Available files: [BibTeX] [DOI] [PDF] [Video] [Video] [Video] [Slides] [Details]
Reviewed Conference Papers
	R. Peikert, F. Sadlo: Topology-guided Visualization of Constrained Vector Fields In Topology-Based Methods in Visualization, Springer Berlin Heidelberg, pp. 21–33, 2007. Available files: [BibTeX] [DOI] [PDF] [Details]

Theses

2017
	B. Rieck: Persistent Homology in Multivariate Data Visualization , Heidelberg University, 2017. Available files: [BibTeX] [DOI] [PDF] [Details]

Topological Analysis

Excerpt (Random Selection):

Toward a Lagrangian Vector Field Topology

Abstract

Available Files

Publications

Theses