The goal of this project is to develop a method for computing a tensor field segmentation based on the topological structure of the eigenvector-fields and the corresponding eigenvalue-fields. For the extraction of the topological skeleton we use eigenvector based interpolation schema making it very simple. The eigenvalue field is used to guide a subdivision and simplification of the topological skeleton into regions of similar behavior. This segmentation allows one to comprehend a tensor field's structure on a qualitative level, and it also makes it possible to determine regions of similar (or dissimilar) behavior. The resulting higher-level characterizations of a tensor field provide valuable information to analyze field behavior on a more abstract level. Our research is motivated by applications encountered in areas like civil engineering and geophysics, where computer simulations often produce tensor field data for which appropriate tools for interpretation are still in their infancy. We have applied our method to a data set representing the simulation of a simple two-point load on a solid block to evaluate its correctness, efficiency, and potential for topology-based analysis of complex tensor fields.

Publications

2013
Automatic, Tensor-Guided Illustrative Vector Field Visualization Proc. IEEE Pacific Visualization Symposium 2013, pp. 265-275, 2013 Cornelia Auer, Jens Kasten, Andrea Kratz, Eugene Zhang, Ingrid Hotz BibTeX
DOI
Topology-based Tensor Field Segmentation
2012
Glyph- and Texture-based Visualization of Segmented Tensor Fields GRAPP/IVAPP Proc. Int. Conf. on Computer Graphics Theory and Applications and Int. Conf. on Information Visualization Theory and Applications, pp. 670-677, 2012, ISBN: 978-989-8565-02-0 Cornelia Auer, Claudia Stripf, Andrea Kratz, Ingrid Hotz BibTeX
DOI
Topology-based Tensor Field Segmentation
2011
Complete Tensor Field Topology on 2D Triangulated Manifolds embedded in 3D Computer Graphics Forum (EuroVis’11), pp. 831-840, 30(3 target), 2011 Cornelia Auer, Ingrid Hotz BibTeX
Topology-based Tensor Field Segmentation
Eigenvector-based Interpolation and Segmentation of 2D Tensor Fields Topological Methods in Data Analysis and Visualization, pp. 139-150, Valerio Pascucci, Xavier Tricoche, Hans Hagen, Julien Tierny (Eds.), Springer, 2011, ISBN: 978-3-642-15013-5 Jaya Sreevalsan-Nair, Cornelia Auer, Bernd Hamann, Ingrid Hotz BibTeX
DOI
Topology-based Tensor Field Segmentation
2009
2D Tensor Field Segmentation Scientific Visualization: Interactions, Features, Metaphors, Hans Hagen (Ed.), Schloss Dagstuhl–Leibniz-Zentrum für Informatik, pp. 17-35, 2009 Cornelia Auer, Jaya Sreevalsan-Nair, Valentin Zobel, Ingrid Hotz BibTeX
DOI
Topology-based Tensor Field Segmentation