@article{HoellererToenniesHegeetal.1995, author = {H{\"o}llerer, Tobias and T{\"o}nnies, Klaus and Hege, Hans-Christian and Stalling, Detlev}, title = {Der Einfluß der Datenapproximation bei Volume Rendering durch ein Emissions/Absorptions-Modell}, series = {Visualisierung - Dynamik und Komplexit{\"a}t}, journal = {Visualisierung - Dynamik und Komplexit{\"a}t}, publisher = {CEVIS Universit{\"a}t Bremen und Fachgruppe 4.2.1 der Gesellschaft f{\"u}r Informatik}, address = {Bremen, Germany}, year = {1995}, language = {en} } @inproceedings{StallingHege1995, author = {Stalling, Detlev and Hege, Hans-Christian}, title = {Fast and Resolution-Independent Line Integral Convolution}, series = {Proceedings of SIGGRAPH '95}, booktitle = {Proceedings of SIGGRAPH '95}, publisher = {Computer Graphics Annual Conference Series, ACM SIGGRAPH}, address = {Los Angeles, California}, doi = {10.1145/218380.218448}, pages = {249 -- 256}, year = {1995}, language = {en} } @article{Hege1994, author = {Hege, Hans-Christian}, title = {Scaling study of pure SU(3) theory - the QCD-TARO collaboration}, series = {Nucl. Phys. B Proc. Suppl.}, volume = {34}, journal = {Nucl. Phys. B Proc. Suppl.}, doi = {10.1016/0920-5632(94)90358-1}, pages = {246 -- 252}, year = {1994}, language = {en} } @article{HashimotoHege1993, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {QCD on the Massively Parallel Computer AP 1000}, series = {Int. J. Mod. Phys.}, volume = {4}, journal = {Int. J. Mod. Phys.}, number = {6}, doi = {10.1142/S0129183193000975}, pages = {1233 -- 1253}, year = {1993}, language = {en} } @article{HashimotoHege1993, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {Autocorrelation in Updating Pure SU(3) Lattice Gauge Theory by the Use of Overrelaxed Algorithms}, series = {Nucl. Phys. B Proc. Suppl.}, volume = {30}, journal = {Nucl. Phys. B Proc. Suppl.}, doi = {10.1016/0920-5632(93)90202-H}, pages = {253 -- 256}, year = {1993}, language = {en} } @article{HashimotoHege1993, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {Study of Spatial Size Effects in Quenched Wilson Hadron Spectroscopy at beta = 6.3}, series = {Nucl. Phys. B Proc. Suppl.}, volume = {30}, journal = {Nucl. Phys. B Proc. Suppl.}, doi = {10.1016/0920-5632(93)90230-4}, pages = {373 -- 376}, year = {1993}, language = {en} } @article{HashimotoHege1993, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {Monte Carlo Renormalization Study at Large beta in the Confinement Region}, series = {Nuclear Phys. B. Proc. Suppl.}, volume = {30}, journal = {Nuclear Phys. B. Proc. Suppl.}, doi = {10.1016/0920-5632(93)90263-6}, pages = {517 -- 520}, year = {1993}, language = {en} } @misc{WunderlingHege1992, author = {Wunderling, Roland and Hege, Hans-Christian}, title = {AGIL - the Adaptable Graphical Interface Layer, Programmierer-Handbuch}, publisher = {Interner Report, Konrad-Zuse-Zentrum f{\"u}r Informationstechnik Berlin (ZIB), Germany}, pages = {34pp.}, year = {1992}, language = {en} } @article{HegeKnecht1992, author = {Hege, Hans-Christian and Knecht, Renate}, title = {Conference Report: Parallel Computing 91}, series = {Parallel Computing}, volume = {18}, journal = {Parallel Computing}, number = {4}, pages = {473 -- 476}, year = {1992}, language = {en} } @article{HashimotoHege1992, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {Hadron Spectroscopy on a 32^3 * 48 Lattice}, series = {Nucl. Phys. B Proc. Suppl. 26}, journal = {Nucl. Phys. B Proc. Suppl. 26}, doi = {10.1016/0920-5632(92)90257-S}, pages = {293 -- 295}, year = {1992}, language = {en} } @inproceedings{DercksenEggerHegeetal.2012, author = {Dercksen, Vincent J. and Egger, Robert and Hege, Hans-Christian and Oberlaender, Marcel}, title = {Synaptic Connectivity in Anatomically Realistic Neural Networks: Modeling and Visual Analysis}, series = {Eurographics Workshop on Visual Computing for Biology and Medicine (VCBM)}, booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine (VCBM)}, address = {Norrk{\"o}ping, Sweden}, doi = {10.2312/VCBM/VCBM12/017-024}, pages = {17 -- 24}, year = {2012}, language = {en} } @misc{PfisterKaynigBothaetal.2012, author = {Pfister, Hanspeter and Kaynig, Verena and Botha, Charl and Bruckner, Stefan and Dercksen, Vincent J. and Hege, Hans-Christian and Roerdink, Jos}, title = {Visualization in Connectomics}, doi = {10.1007/978-1-4471-6497-5_21}, year = {2012}, language = {en} } @article{WeberGreenanProhaskaetal.2012, author = {Weber, Britta and Greenan, Garrett and Prohaska, Steffen and Baum, Daniel and Hege, Hans-Christian and M{\"u}ller-Reichert, Thomas and Hyman, Anthony and Verbavatz, Jean-Marc}, title = {Automated tracing of microtubules in electron tomograms of plastic embedded samples of Caenorhabditis elegans embryos}, series = {Journal of Structural Biology}, volume = {178}, journal = {Journal of Structural Biology}, number = {2}, doi = {10.1016/j.jsb.2011.12.004}, pages = {129 -- 138}, year = {2012}, language = {en} } @article{KastenReininghausHotzetal.2011, author = {Kasten, Jens and Reininghaus, Jan and Hotz, Ingrid and Hege, Hans-Christian}, title = {Two-Dimensional Time-Dependent Vortex Regions Based on the Acceleration Magnitude}, series = {IEEE Transactions on Visualization and Computer Graphics}, volume = {17}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = {12}, pages = {2080 -- 2087target}, year = {2011}, language = {en} } @article{LindowBaumHege2011, author = {Lindow, Norbert and Baum, Daniel and Hege, Hans-Christian}, title = {Voronoi-Based Extraction and Visualization of Molecular Paths}, series = {IEEE Transactions on Visualization and Computer Graphics}, volume = {17}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = {12}, doi = {10.1109/TVCG.2011.259}, pages = {2025 -- 2034}, year = {2011}, language = {en} } @article{LacarellePMoeckPaschereitetal.2010, author = {Lacarelle, Arnaud and P. Moeck, Jonas and Paschereit, Christian and Gelbert, Gregor and King, Rudibert and M. Luchtenburg, Dirk and Noack, Bernd R. and Kasten, Jens and Hege, Hans-Christian}, title = {Modeling a Fuel/Air Mixing to Control the Pressure Pulsations and NOx Emissions in a Lean Premixed Combustor}, series = {Active Flow Control II}, volume = {108}, journal = {Active Flow Control II}, publisher = {Springer, Berlin}, doi = {10.1007/978-3-642-11735-0_20}, pages = {307 -- 321}, year = {2010}, language = {en} } @article{LindowBaumProhaskaetal.2010, author = {Lindow, Norbert and Baum, Daniel and Prohaska, Steffen and Hege, Hans-Christian}, title = {Accelerated Visualization of Dynamic Molecular Surfaces}, series = {Comput. Graph. Forum}, volume = {29}, journal = {Comput. Graph. Forum}, doi = {10.1111/j.1467-8659.2009.01693.x}, pages = {943 -- 952}, year = {2010}, language = {en} } @inproceedings{ReininghausGuentherHotzetal.2010, author = {Reininghaus, Jan and G{\"u}nther, David and Hotz, Ingrid and Prohaska, Steffen and Hege, Hans-Christian}, title = {TADD: A Computational Framework for Data Analysis Using Discrete Morse Theory}, series = {Mathematical Software - ICMS 2010}, volume = {6327}, booktitle = {Mathematical Software - ICMS 2010}, publisher = {Springer}, doi = {10.1007/978-3-642-15582-6_35}, pages = {198 -- 208}, year = {2010}, language = {en} } @article{RybakKussLameckeretal.2010, author = {Rybak, J{\"u}rgen and Kuß, Anja and Lamecker, Hans and Zachow, Stefan and Hege, Hans-Christian and Lienhard, Matthias and Singer, Jochen and Neubert, Kerstin and Menzel, Randolf}, title = {The Digital Bee Brain: Integrating and Managing Neurons in a Common 3D Reference System}, series = {Front. Syst. Neurosci.}, volume = {4}, journal = {Front. Syst. Neurosci.}, number = {30}, doi = {10.3389/fnsys.2010.00030}, year = {2010}, language = {en} } @incollection{KastenWeinkaufPetzetal.2010, author = {Kasten, Jens and Weinkauf, Tino and Petz, Christoph and Hotz, Ingrid and Noack, Bernd R. and Hege, Hans-Christian}, title = {Extraction of Coherent Structures from Natural and Actuated Flows}, series = {Active Flow Control II}, volume = {108}, booktitle = {Active Flow Control II}, publisher = {Springer, Berlin}, isbn = {978-3-642-11734-3}, doi = {10.1007/978-3-642-11735-0_24}, pages = {373 -- 387}, year = {2010}, language = {en} } @article{OttoGermerHegeetal.2010, author = {Otto, Mathias and Germer, Tobias and Hege, Hans-Christian and Theisel, Holger}, title = {Uncertain 2D Vector Field Topology}, series = {Comput. Graph. Forum}, volume = {29}, journal = {Comput. Graph. Forum}, doi = {10.1111/j.1467-8659.2009.01604.x}, pages = {347 -- 356}, year = {2010}, language = {en} } @article{GoubergritsThamsenBertheetal.2010, author = {Goubergrits, Leonid and Thamsen, Bente and Berthe, Andr{\´e} and Poethke, Jens and Kertzscher, Ulrich and Affeld, Klaus and Petz, Christoph and Hege, Hans-Christian and Hoch, Heinrich and Spuler, Andreas}, title = {In Vitro Study of Near-Wall Flow in a Cerebral Aneurysm Model with and without Coils}, series = {American Journal of Neuroradiology}, volume = {31:8}, journal = {American Journal of Neuroradiology}, doi = {10.3174/ajnr.A2121}, pages = {1521 -- 1528}, year = {2010}, language = {en} } @article{HegeLaidlawMachiraju2010, author = {Hege, Hans-Christian and Laidlaw, David and Machiraju, Raghu}, title = {Guest Editor's Introduction: Special Section on Volume Graphics and Point-Based Graphics}, series = {IEEE Trans. Vis. Comput. Graph.}, volume = {16}, journal = {IEEE Trans. Vis. Comput. Graph.}, number = {4}, doi = {10.1109/TVCG.2010.72}, pages = {531 -- 532}, year = {2010}, language = {en} } @article{LindowBaumBondaretal.2013, author = {Lindow, Norbert and Baum, Daniel and Bondar, Ana-Nicoleta and Hege, Hans-Christian}, title = {Exploring cavity dynamics in biomolecular systems}, series = {BMC Bioinformatics}, volume = {14}, journal = {BMC Bioinformatics}, edition = {(Suppl 19):S5}, doi = {10.1186/1471-2105-14-S19-S5}, year = {2013}, language = {en} } @article{PoethkowPetzHege2013, author = {P{\"o}thkow, Kai and Petz, Christoph and Hege, Hans-Christian}, title = {Approximate Level-Crossing Probabilities for Interactive Visualization of Uncertain Isocontours}, series = {International Journal for Uncertainty Quantification}, volume = {3}, journal = {International Journal for Uncertainty Quantification}, number = {2}, doi = {10.1615/Int.J.UncertaintyQuantification.2012003958}, pages = {101 -- 117}, year = {2013}, language = {en} } @misc{HombergBaumWiebeletal.2014, author = {Homberg, Ulrike and Baum, Daniel and Wiebel, Alexander and Prohaska, Steffen and Hege, Hans-Christian}, title = {Definition, Extraction, and Validation of Pore Structures in Porous Materials}, series = {Topological Methods in Data Analysis and Visualization III}, journal = {Topological Methods in Data Analysis and Visualization III}, editor = {Bremer, Peer-Timo and Hotz, Ingrid and Pascucci, Valerio and Peikert, Ronald}, publisher = {Springer}, doi = {10.1007/978-3-319-04099-8_15}, pages = {235 -- 248}, year = {2014}, language = {en} } @inproceedings{RosanwoPetzProhaskaetal.2009, author = {Rosanwo, Olufemi and Petz, Christoph and Prohaska, Steffen and Hotz, Ingrid and Hege, Hans-Christian}, title = {Dual Streamline Seeding}, series = {Proceedings of the IEEE Pacific Visualization Symposium}, booktitle = {Proceedings of the IEEE Pacific Visualization Symposium}, editor = {Eades, Peter and Ertl, Thomas and Shen, Han-Wei}, address = {Beijing, China}, pages = {9 -- 16}, year = {2009}, language = {en} } @inproceedings{RybakKussHolleretal.2009, author = {Rybak, J{\"u}rgen and Kuß, Anja and Holler, Wolfgang and Brandt, Robert and Hege, Hans-Christian and Menzel, Randolf}, title = {The HoneyBee Standard Brain (HSB) - a versatile atlas tool for integrating data and data exchange in the neuroscience community}, series = {BMC Neuroscience}, volume = {10 (Suppl 1):P1}, booktitle = {BMC Neuroscience}, doi = {10.1186/1471-2202-10-S1-P1}, year = {2009}, language = {en} } @article{OberlaenderDercksenEggeretal.2009, author = {Oberlaender, Marcel and Dercksen, Vincent J. and Egger, Robert and Gensel, Maria and Sakmann, Bert and Hege, Hans-Christian}, title = {Automated three-dimensional detection and counting of neuron somata}, series = {Journal of Neuroscience Methods}, volume = {180}, journal = {Journal of Neuroscience Methods}, number = {1}, doi = {10.1016/j.jneumeth.2009.03.008}, pages = {147 -- 160}, year = {2009}, language = {en} } @article{GoubergritsWeberPetzetal.2009, author = {Goubergrits, Leonid and Weber, Sarah and Petz, Christoph and Spuler, Andreas and P{\"o}thke, Jens and Berthe, Andr{\´e} and Hege, Hans-Christian}, title = {Wall-PIV as a Near Wall Flow Validation Tool for CFD}, series = {Journal of Visualization}, volume = {12}, journal = {Journal of Visualization}, number = {3}, pages = {241 -- 250}, year = {2009}, language = {en} } @article{GoubergritsWellnhoferKertzscheretal.2009, author = {Goubergrits, Leonid and Wellnhofer, Ernst and Kertzscher, Ulrich and Affeld, Klaus and Petz, Christoph and Hege, Hans-Christian}, title = {Coronary Artery WSS Profiling Using a Geometry Reconstruction Based on Biplane Angiography}, series = {Annals of Biomedical Engineering}, volume = {37}, journal = {Annals of Biomedical Engineering}, number = {4}, publisher = {Springer}, doi = {s10439-009-9656-7}, pages = {682 -- 691}, year = {2009}, language = {en} } @book{HegeEds1998, author = {Hege, Hans-Christian and (Eds.), Konrad}, title = {Mathematical Visualization - Algorithms, Applications, and Numerics}, publisher = {Springer}, address = {Heidelberg}, isbn = {ISBN 3-540-63991-8}, year = {1998}, language = {en} } @book{HegePolthier1998, author = {Hege, Hans-Christian and Polthier, Konrad}, title = {VideoMath - Festival at ICM 98}, series = {Springer VideoMath}, journal = {Springer VideoMath}, isbn = {978-3-540-21385-7}, year = {1998}, language = {en} } @article{CourniaAllenAndricioaeietal.2015, author = {Cournia, Zoe and Allen, Toby W. and Andricioaei, Ioan and Antonny, Bruno and Baum, Daniel and Brannigan, Grace and Buchete, Nicolae-Viorel and Deckman, Jason T. and Delemotte, Lucie and del Val, Coral and Friedman, Ran and Gkeka, Paraskevi and Hege, Hans-Christian and H{\´e}nin, J{\´e}r{\^o}me and Kasimova, Marina A. and Kolocouris, Antonios and Klein, Michael L. and Khalid, Syma and Lemieux, Joanne and Lindow, Norbert and Roy, Mahua and Selent, Jana and Tarek, Mounir and Tofoleanu, Florentina and Vanni, Stefano and Urban, Sinisa and Wales, David J. and Smith, Jeremy C. and Bondar, Ana-Nicoleta}, title = {Membrane Protein Structure, Function and Dynamics: A Perspective from Experiments and Theory}, series = {Journal of Membrane Biology}, volume = {248}, journal = {Journal of Membrane Biology}, number = {4}, doi = {10.1007/s00232-015-9802-0}, pages = {611 -- 640}, year = {2015}, language = {en} } @article{MuecklichWebelAboulfadletal., author = {M{\"u}cklich, Frank and Webel, Johannes and Aboulfadl, Hisham and Lindow, Norbert and Hege, Hans-Christian}, title = {Correlative Tomography - Extraction of Reliable Information with Adequate Resolution from mm Scale Down to Sub-nm Scale}, series = {Microsc. Microanal.}, volume = {20}, journal = {Microsc. Microanal.}, number = {Suppl 3}, doi = {10.1017/S1431927614005911}, pages = {838 -- 839}, language = {en} } @inproceedings{EngelkeKuhnFlatkenetal.2015, author = {Engelke, Wito and Kuhn, Alexander and Flatken, Markus and Chen, Fang and Hege, Hans-Christian and Gerndt, Andreas and Hotz, Ingrid}, title = {Atmospheric Impact of Volcano Eruptions}, series = {Proceedings IEEE SciVis 2014}, booktitle = {Proceedings IEEE SciVis 2014}, year = {2015}, abstract = {The analysis of data that captures volcanic eruptions and their atmospheric aftermath plays an important role for domain experts to gain a deeper understanding of the volcanic eruption and their consequences for atmosphere, climate and air traffic. Thereby, one major challenge is to extract and combine the essential information, which is spread over various, mostly sparse data sources. This requires a careful integration of each data set with its strength and limitations. The sparse, but more reliable measurement data is mainly used to calibrate the more dense simulation data. This work combines a collection of visualization approaches into an exploitative framework. The goal is to support the domain experts to build a complete picture of the situation. But it is also important to understand the individual data sources, the wealth of their information and the quality of the simulation results. All presented methods are designed for direct interaction with the data from different perspectives rather than the sole generation of some final images.}, language = {en} } @misc{DeuflhardHege, author = {Deuflhard, Peter and Hege, Hans-Christian}, title = {Raumtiefe in Malerei und Computergrafik}, series = {R{\"a}ume - Bilder - Kulturen}, journal = {R{\"a}ume - Bilder - Kulturen}, editor = {Lepper, Verena and Deuflhard, Peter and Markschies, Christoph}, publisher = {Walter De Gruyter}, isbn = {978-3-11-035993-0}, pages = {33 -- 46}, abstract = {Einf{\"u}hrung: Die Tiefenwirkung dreidimensionaler R{\"a}ume in einem zweidimensionalen Bild einzufangen, ist ein Faszinosum nahezu aller Kulturen der Menschheitsgeschichte. Der vorliegende Aufsatz folgt den Spuren dieses Faszinosums, vergleichend in der Malerei und der mathematisierten Computergrafik. Die Entdeckung der Zentralperspektive in der italienischen Renaissance zeigt bereits den engen Zusammenhang von Malerei und Mathematik. Auf der Suche nach Maltechniken, mit denen Raumtiefe bildnerisch dargestellt werden kann, beginnen wir in Kap. 2 mit einem chronologischen Gang durch verschiedene Epochen der europ{\"a}ischen Malerei. Hieraus abgeleitete Prinzipien, soweit sie im Rechner realisierbar scheinen, stellen wir in Kap. 3 am Beispiel moderner Methoden der mathematischen Visualisierung vor.}, language = {de} } @article{KastenReininghausHotzetal.2016, author = {Kasten, Jens and Reininghaus, Jan and Hotz, Ingrid and Hege, Hans-Christian and Noack, Bernd and Daviller, Guillaume and Morzyński, Marek}, title = {Acceleration feature points of unsteady shear flows}, series = {Archives of Mechanics}, volume = {68}, journal = {Archives of Mechanics}, number = {1}, pages = {55 -- 80}, year = {2016}, abstract = {A framework is proposed for extracting features in 2D transient flows, based on the acceleration field to ensure Galilean invariance. The minima of the acceleration magnitude, i.e. a superset of the acceleration zeros, are extracted and discriminated into vortices and saddle points --- based on the spectral properties of the velocity Jacobian. The extraction of topological features is performed with purely combinatorial algorithms from discrete computational topology. The feature points are prioritized with persistence, as a physically meaningful importance measure. These features are tracked in time with a robust algorithm for tracking features. Thus a space-time hierarchy of the minima is built and vortex merging events are detected. The acceleration feature extraction strategy is applied to three two-dimensional shear flows: (1) an incompressible periodic cylinder wake, (2) an incompressible planar mixing layer and (3) a weakly compressible planar jet. The vortex-like acceleration feature points are shown to be well aligned with acceleration zeros, maxima of the vorticity magnitude, minima of pressure field and minima of λ2.}, language = {en} } @inproceedings{AgudoJacomeHegePaetschetal., author = {Agudo J{\´a}come, Leonardo and Hege, Hans-Christian and Paetsch, Olaf and P{\"o}thkow, Kai}, title = {3D Reconstruction, Visualization and Quantification of Dislocations from Transmission Electron Microscopy Stereo-Pairs}, series = {Microscopy and Microanalysis 2016, July 24-28 Columbus, Ohio}, booktitle = {Microscopy and Microanalysis 2016, July 24-28 Columbus, Ohio}, language = {en} } @inproceedings{KuhnEngelkeFlatkenetal., author = {Kuhn, Alexander and Engelke, Wito and Flatken, Markus and Hege, Hans-Christian and Hotz, Ingrid}, title = {Topology-based Analysis for Multimodal Atmospheric Data of Volcano Eruptions}, series = {Topological Methods in Data Analysis and Visualization IV}, booktitle = {Topological Methods in Data Analysis and Visualization IV}, publisher = {Springer}, address = {Cham, Schweiz}, doi = {10.1007/978-3-319-44684-4_2}, pages = {35 -- 50}, language = {en} } @article{GuentherKuhnHegeetal., author = {G{\"u}nther, Tobias and Kuhn, Alexander and Hege, Hans-Christian and Theisel, Holger}, title = {MCFTLE: Monte Carlo Rendering of Finite-Time Lyapunov Exponent Fields}, series = {Computer Graphics Forum}, volume = {35}, journal = {Computer Graphics Forum}, number = {3}, doi = {10.1111/cgf.12914}, pages = {381 -- 390}, language = {en} } @inproceedings{SagnolHegeWeiser, author = {Sagnol, Guillaume and Hege, Hans-Christian and Weiser, Martin}, title = {Using sparse kernels to design computer experiments with tunable precision}, series = {22nd Intern. Conf. on Computational Statistics - COMPSTAT 2016, Oviedo, Spain, 23-26 August 2016, Proceedings ISBN 978-90-73592-36-0}, booktitle = {22nd Intern. Conf. on Computational Statistics - COMPSTAT 2016, Oviedo, Spain, 23-26 August 2016, Proceedings ISBN 978-90-73592-36-0}, pages = {397 -- 408}, language = {en} } @inproceedings{BaumMahlowLameckeretal., author = {Baum, Daniel and Mahlow, Kristin and Lamecker, Hans and Zachow, Stefan and M{\"u}ller, Johannes and Hege, Hans-Christian}, title = {The Potential of Surface-based Geometric Morphometrics for Evolutionary Studies: An Example using Dwarf Snakes (Eirenis)}, series = {Abstract in DigitalSpecimen 2014}, booktitle = {Abstract in DigitalSpecimen 2014}, abstract = {Geometric morphometrics plays an important role in evolutionary studies. The state-of-the-art in this field are landmark-based methods. Since the landmarks usually need to be placed manually, only a limited number of landmarks are generally used to represent the shape of an anatomical structure. As a result, shape characteristics that cannot be properly represented by small sets of landmarks are disregarded. In this study, we present a method that is free of this limitation. The method takes into account the whole shape of an anatomical structure, which is represented as a surface, hence the term 'surface-based morphometrics'. Correspondence between two surfaces is established by defining a partitioning of the surfaces into homologous surface patches. The first step for the generation of a surface partitioning is to place landmarks on the surface. Subsequently, the landmarks are connected by curves lying on the surface. The curves, called 'surface paths', might either follow specific anatomical features or they can be geodesics, that is, shortest paths on the surface. One important requirement, however, is that the resulting surface path networks are topologically equivalent across all surfaces. Once the surface path networks have been defined, the surfaces are decomposed into patches according to the path networks. This approach has several advantages. One of them is that we can discretize the surface by as many points as desired. Thus, even fine shape details can be resolved if this is of interest for the study. Since a point discretization is used, another advantage is that well-established analysis methods for landmark-based morphometrics can be utilized. Finally, the shapes can be easily morphed into one another, thereby greatly supporting the understanding of shape changes across all considered specimens. To show the potential of the described method for evolutionary studies of biological specimens, we applied the method to the para-basisphenoid complex of the snake genus Eirenis. By using this anatomical structure as example, we present all the steps that are necessary for surface-based morphometrics, including the segmentation of the para-basisphenoid complex from micro-CT data sets. We also show some first results using statistical analysis as well as classification methods based on the presented technique.}, language = {en} } @misc{GuentherKuhnHegeetal., author = {G{\"u}nther, Tobias and Kuhn, Alexander and Hege, Hans-Christian and Gross, Markus and Theisel, Holger}, title = {Progressive Monte-Carlo Rendering of Atmospheric Flow Features Across Scales}, series = {69th Annual Meeting of the APS Division of Fluid Dynamics, Gallery of Fluid Motion, Nov 20-22, 2016, Portland, OR, USA.}, journal = {69th Annual Meeting of the APS Division of Fluid Dynamics, Gallery of Fluid Motion, Nov 20-22, 2016, Portland, OR, USA.}, doi = {10.1103/APS.DFD.2016.GFM.P0030}, abstract = {To improve existing weather prediction and reanalysis capabilities, high-resolution and multi-modal climate data becomes an increasingly important topic. The advent of increasingly dense numerical simulation of atmospheric phenomena, provides new means to better understand dynamic processes and to visualize structural flow patterns that remain hidden otherwise. In the presented illustrations we demonstrate an advanced technique to visualize multiple scales of dense flow fields and Lagrangian patterns therein, simulated by state-of-the-art simulation models for each scale. They provide a deeper insight into the structural differences and patterns that occur on each scale and highlight the complexity of flow phenomena in our atmosphere.}, language = {en} } @inproceedings{ArltLindowBaumetal., author = {Arlt, Tobias and Lindow, Norbert and Baum, Daniel and Hilger, Andre and Mahnke, Ingo and Hege, Hans-Christian and Lepper, Verena and Siopi, Tzulia and Mahnke, Heinz.Eberhard}, title = {Virtual Access to Hidden Texts - Study of Ancient Papyri}, series = {Eighth Joint BER II and BESSY II User Meeting, Dec 7-9, 2016, Berlin, Germany}, booktitle = {Eighth Joint BER II and BESSY II User Meeting, Dec 7-9, 2016, Berlin, Germany}, abstract = {When physical unfolding/unrolling of papyri is not possible or too dangerous for preserving the precious object, tomographic approaches may be the ap- propriate alternative. Requirements are the resolution and the contrast to distinguish writing and substrate. The steps to be performed are the following: (1) Select the object of interest (archaeological arguments, cultural back- ground of the object, etc.). (2) Find the proper physical procedure, especially with respect to contrast, take the tomographic data, e.g. by absorption x-ray tomography. (3) Apply mathematical unfolding transformations to the tomographic data, in order to obtain a 2d-planar reconstruction of text.}, language = {en} } @inproceedings{KuhnHege, author = {Kuhn, Alexander and Hege, Hans-Christian}, title = {Object-based visualization and evaluation of cloud-resolving simulations}, series = {Book of Abstracts, SCCS 2017 - Scaling Cascades in Complex Systems, Mar 27-29, 2017, Berlin, Germany}, booktitle = {Book of Abstracts, SCCS 2017 - Scaling Cascades in Complex Systems, Mar 27-29, 2017, Berlin, Germany}, abstract = {Recent advances in high-resolution, cloud resolving simulation models pose several challenges towards respective analysis methodologies. To enable efficient comparison and validation of such models efficient, scalable, and informative diagnostic procedures are mandatory. In this talk, an object-based evaluation scheme based on the notion of scalar field topology will be presented. The presentation will cover the application of topological clustering procedures for object identification, tracking, and the retrieval of object-based statistics. The pro-posed methodology is shown to enable an advanced in-depth evaluation and visualization of high cloud-resolving models. Using a newly developed large-scale high-resolution model (i.e., HD(CP)2 ICON), it will be demonstrated that the presented procedures are applicable to assess the model performance compared to measurements (e.g., radar, satellite) and standard operational models (COSMO) at different domains and spatial scales.}, language = {en} } @misc{PolthierSullivanZiegleretal., author = {Polthier, Konrad and Sullivan, John and Ziegler, G{\"u}nter M. and Hege, Hans-Christian}, title = {Visualization}, series = {MATHEON - Mathematics for Key Technologies}, journal = {MATHEON - Mathematics for Key Technologies}, editor = {Deuflhard, Peter and et al.,}, publisher = {European Mathematical Society}, isbn = {978-3-03719-137-8}, doi = {10.4171/137}, pages = {335 -- 339}, language = {en} } @misc{LameckerHegeTabelowetal., author = {Lamecker, Hans and Hege, Hans-Christian and Tabelow, Karsten and Polzehl, J{\"o}rg}, title = {Image Processing}, series = {MATHEON - Mathematics for Key Technologies}, journal = {MATHEON - Mathematics for Key Technologies}, editor = {Deuflhard, Peter and et al.,}, publisher = {European Mathematical Society}, doi = {10.4171/137}, pages = {359 -- 376}, language = {en} } @article{KramerNoackBaumetal., author = {Kramer, Tobias and Noack, Matthias and Baum, Daniel and Hege, Hans-Christian and Heller, Eric J.}, title = {Dust and gas emission from cometary nuclei: the case of comet 67P/Churyumov-Gerasimenko}, series = {Advances in Physics: X}, volume = {3}, journal = {Advances in Physics: X}, number = {1}, doi = {10.1080/23746149.2017.1404436}, pages = {1404436}, abstract = {Comets display with decreasing solar distance an increased emission of gas and dust particles, leading to the formation of the coma and tail. Spacecraft missions provide insight in the temporal and spatial variations of the dust and gas sources located on the cometary nucleus. For the case of comet 67P/Churyumov-Gerasimenko (67P/C-G), the long-term obser- vations from the Rosetta mission point to a homogeneous dust emission across the entire illuminated surface. Despite the homogeneous initial dis- tribution, a collimation in jet-like structures becomes visible. We propose that this observation is linked directly to the complex shape of the nucleus and projects concave topographical features into the dust coma. To test this hypothesis, we put forward a gas-dust description of 67P/C-G, where gravitational and gas forces are accurately determined from the surface mesh and the rotation of the nucleus is fully incorporated. The emerging jet-like structures persist for a wide range of gas-dust interactions and show a dust velocity dependent bending.}, language = {en} } @inproceedings{SakuraiHegeKuhnetal., author = {Sakurai, Daisuke and Hege, Hans-Christian and Kuhn, Alexander and Rust, Henning and Kern, Bastian and Breitkopf, Tom-Lukas}, title = {An Application-Oriented Framework for Feature Tracking in Atmospheric Sciences}, series = {Proceedings of 2017 IEEE 7th Symposium on Large Data Analysis and Visualization (LDAV)}, booktitle = {Proceedings of 2017 IEEE 7th Symposium on Large Data Analysis and Visualization (LDAV)}, doi = {10.1109/LDAV.2017.8231857}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-66685}, pages = {96 -- 97}, abstract = {In atmospheric sciences, sizes of data sets grow continuously due to increasing resolutions. A central task is the comparison of spatiotemporal fields, to assess different simulations and to compare simulations with observations. A significant information reduction is possible by focusing on geometric-topological features of the fields or on derived meteorological objects. Due to the huge size of the data sets, spatial features have to be extracted in time slices and traced over time. Fields with chaotic component, i.e. without 1:1 spatiotemporal correspondences, can be compared by looking upon statistics of feature properties. Feature extraction, however, requires a clear mathematical definition of the features - which many meteorological objects still lack. Traditionally, object extractions are often heuristic, defined only by implemented algorithms, and thus are not comparable. This work surveys our framework designed for efficient development of feature tracking methods and for testing new feature definitions. The framework supports well-established visualization practices and is being used by atmospheric researchers to diagnose and compare data.}, language = {en} }