@incollection{BengerHegeMerzkyetal.2000, author = {Benger, Werner and Hege, Hans-Christian and Merzky, Andr{\´e} and Radke, Thomas and Seidel, Edward}, title = {Efficient Distributed File I/O for Visualization in Grid Environments}, series = {Simulation and Visualization on the Grid}, volume = {13}, booktitle = {Simulation and Visualization on the Grid}, publisher = {Springer Verlag}, pages = {1 -- 6}, year = {2000}, language = {en} } @misc{GuentherReininghausProhaskaetal.2012, author = {G{\"u}nther, David and Reininghaus, Jan and Prohaska, Steffen and Weinkauf, Tino and Hege, Hans-Christian}, title = {Efficient Computation of a Hierarchy of Discrete 3D Gradient Vector Fields}, series = {Topological Methods in Data Analysis and Visualization II}, journal = {Topological Methods in Data Analysis and Visualization II}, editor = {Peikert, Ronny and Hauser, Helwig and Carr, Hamish}, publisher = {Springer}, doi = {10.1007/978-3-642-23175-9_2}, pages = {15 -- 29}, year = {2012}, language = {en} } @inproceedings{LindowBaumBondaretal.2012, author = {Lindow, Norbert and Baum, Daniel and Bondar, Ana-Nicoleta and Hege, Hans-Christian}, title = {Dynamic Channels in Biomolecular Systems: Path Analysis and Visualization}, series = {Proceedings of IEEE Symposium on Biological Data Visualization (biovis'12)}, booktitle = {Proceedings of IEEE Symposium on Biological Data Visualization (biovis'12)}, doi = {10.1109/BioVis.2012.6378599}, pages = {99 -- 106}, year = {2012}, language = {en} } @misc{KramerNoackBaumetal.2017, 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}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-66338}, year = {2017}, 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} } @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} } @misc{RosanwoPetzProhaskaetal., author = {Rosanwo, Olufemi and Petz, Christoph and Prohaska, Steffen and Hotz, Ingrid and Hege, Hans-Christian}, title = {Dual Streamline Seeding - Method and Implementation}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-11032}, number = {08-49}, abstract = {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.}, 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{HegeWeinkaufProhaskaetal.2004, author = {Hege, Hans-Christian and Weinkauf, Tino and Prohaska, Steffen and Hutanu, Andrei}, title = {Distributed visualization and analysis of fluid dynamics data}, series = {Proc. Fourth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration}, booktitle = {Proc. Fourth International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration}, address = {Sendai, Japan}, pages = {145 -- 150}, year = {2004}, language = {en} } @article{HegeKastenHotz2011, author = {Hege, Hans-Christian and Kasten, Jens and Hotz, Ingrid}, title = {Distillation and Visualization of Spatiotemporal Structures in Turbulent Flow Fields}, series = {J. Phys.}, volume = {318}, journal = {J. Phys.}, edition = {6}, doi = {10.1088/1742-6596/318/6/062009}, pages = {062009}, year = {2011}, language = {en} } @inproceedings{ZeilhoferSaderApostolescuetal.2000, author = {Zeilhofer, Hans-Florian and Sader, Robert and Apostolescu, Victor and Hoffmann, Karl-Heinz and G{\"o}bel, Martin and Hege, Hans-Christian}, title = {Die Bedeutung breitbandiger und leistungsf{\"a}higer Kommunikationsinfrastrukturen f{\"u}r die kraniomaxillofaziale Chirurgie - M{\"o}glichkeiten der netzbasierten Bildverarbeitung}, series = {Bildverarbeitung f{\"u}r die Medizin 2000 (Abstract)}, booktitle = {Bildverarbeitung f{\"u}r die Medizin 2000 (Abstract)}, address = {M{\"u}nchen}, year = {2000}, language = {en} } @inproceedings{WegnerStallingHegeetal.1997, author = {Wegner, Susan and Stalling, Detlev and Hege, Hans-Christian and Oswald, H. and Fleck, E.}, title = {Die 3D-Wasserscheidentransformation auf Graphenebene - eine Anwendung f{\"u}r die Hyperthermieplannung}, series = {Digitale Bildverarbeitung in der Medizin, Tagungsband zum 5. Freiburger Workshop}, booktitle = {Digitale Bildverarbeitung in der Medizin, Tagungsband zum 5. Freiburger Workshop}, editor = {Arnolds, B. and M{\"u}ller, H. and Saupe, D. and Tolxdorff, Thomas}, address = {Freiburg}, pages = {31 -- 36}, year = {1997}, language = {en} } @inproceedings{CoconuHege, author = {Coconu, Liviu and Hege, Hans-Christian}, title = {devEyes: Tangible Devices on Augmented Passive Surfaces}, series = {TEI '17 Proceedings of the Eleventh International Conference on Tangible, Embedded, and Embodied Interaction, Yokohama, Japan, March 20 - 23, 2017}, booktitle = {TEI '17 Proceedings of the Eleventh International Conference on Tangible, Embedded, and Embodied Interaction, Yokohama, Japan, March 20 - 23, 2017}, doi = {10.1145/3024969.3025065}, pages = {409 -- 411}, abstract = {We present a novel approach to turn smartphones/ tablets into tangible near-surface devices with augmented reality (AR) capability on virtually any passive surface, like desks, tables and wallboards. A low-cost optoelectronic add-on for the device back camera enables position tracking on an almost invisible printable fiducial marker grid. This approach is promising in terms of adoption potential because it can be used anywhere with existing devices, requires no dedicated hardware installations and is applicable to a broad range of real-world applications.}, language = {en} } @inproceedings{StallingHege1995, author = {Stalling, Detlev and Hege, Hans-Christian}, title = {Design and Implementation of a Hyperthermia Planning System}, series = {Tagungsband zum 4. Freiburger Workshop Digitale Bildverarbeitung in der Medizin}, booktitle = {Tagungsband zum 4. Freiburger Workshop Digitale Bildverarbeitung in der Medizin}, address = {Freiburg/Breisgau}, year = {1995}, language = {en} } @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} } @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} } @misc{HombergBaumWiebeletal., 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}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-42510}, abstract = {An intuitive and sparse representation of the void space of porous materials supports the efficient analysis and visualization of interesting qualitative and quantitative parameters of such materials. We introduce definitions of the elements of this void space, here called pore space, based on its distance function, and present methods to extract these elements using the extremal structures of the distance function. The presented methods are implemented by an image processing pipeline that determines pore centers, pore paths and pore constrictions. These pore space elements build a graph that represents the topology of the pore space in a compact way. The representations we derive from μCT image data of realistic soil specimens enable the computation of many statistical parameters and, thus, provide a basis for further visual analysis and application-specific developments. We introduced parts of our pipeline in previous work. In this chapter, we present additional details and compare our results with the analytic computation of the pore space elements for a sphere packing in order to show the correctness of our graph computation.}, language = {en} } @misc{WiebelHegeZiechetal.2011, author = {Wiebel, Alexander and Hege, Hans-Christian and Ziech, Manon and Caan, Matthan and Stoker, Jaap and Vos, Frans}, title = {DCE-MRI-oriented Volume Rendering for Monitoring of Crohn's Disease.}, series = {BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization}, journal = {BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization}, year = {2011}, language = {en} } @article{HegeStueben1995, author = {Hege, Hans-Christian and St{\"u}ben, Hinnerk}, title = {Daten "sehen" - Wissenschaftliche Visualisierung im RTB Berlin}, series = {DFN Mitteilungen}, volume = {38}, journal = {DFN Mitteilungen}, pages = {10 -- 12target}, year = {1995}, language = {en} } @inproceedings{Hege2003, author = {Hege, Hans-Christian}, title = {Creation and Visualization of Anatomical Models with Amira}, series = {Proc. of 3D Modelling 2003}, booktitle = {Proc. of 3D Modelling 2003}, address = {Paris}, pages = {7pp.}, year = {2003}, language = {en} } @inproceedings{KainmuellerLameckerZachowetal.2008, author = {Kainm{\"u}ller, Dagmar and Lamecker, Hans and Zachow, Stefan and Hege, Hans-Christian}, title = {Coupling Deformable Models for Multi-object Segmentation}, series = {Proc. Int. Symp. on Computational Models for Biomedical Simulation (ISBMS)}, booktitle = {Proc. Int. Symp. on Computational Models for Biomedical Simulation (ISBMS)}, doi = {10.1007/978-3-540-70521-5_8}, pages = {69 -- 78}, year = {2008}, 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} } @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} } @article{WeinkaufSahnerTheiseletal.2007, author = {Weinkauf, Tino and Sahner, Jan and Theisel, Holger and Hege, Hans-Christian}, title = {Cores of Swirling Particle Motion in Unsteady Flows}, series = {IEEE Transactions on Visualization and Computer Graphics (Proceedings Visualization 2007)}, volume = {13}, journal = {IEEE Transactions on Visualization and Computer Graphics (Proceedings Visualization 2007)}, number = {6}, doi = {10.1109/TVCG.2007.70545}, pages = {1759 -- 1766}, year = {2007}, language = {en} } @inproceedings{KlindtProhaskaBaumetal.2012, author = {Klindt, Marco and Prohaska, Steffen and Baum, Daniel and Hege, Hans-Christian}, title = {Conveying Archaeological Contexts to Museum Visitors: Case Study Pergamon Exhibition}, series = {VAST12: The 13th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage - Short Papers}, booktitle = {VAST12: The 13th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage - Short Papers}, editor = {Arnold, David and Kaminski, Jaime and Niccolucci, Franco and Stork, Andre}, publisher = {Eurographics Association}, address = {Brighton, UK}, doi = {10.2312/PE/VAST/VAST12S/025-028}, pages = {25 -- 28}, year = {2012}, language = {en} } @inproceedings{GuentherThielePetzetal.2007, author = {G{\"u}nther, Bert and Thiele, Frank and Petz, Ralf and Nitsche, Wolfgang and Sahner, Jan and Weinkauf, Tino and Hege, Hans-Christian}, title = {Control of Separation on the Flap of a Three-Element High-Lift Configuration}, series = {45th AIAA Aerospace Sciences Meeting and Exhibit}, booktitle = {45th AIAA Aerospace Sciences Meeting and Exhibit}, address = {Reno, NV, U.S.A.}, year = {2007}, 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{BarthHegeIkedaetal.2009, author = {Barth, Ingo and Hege, Hans-Christian and Ikeda, Hiroshi and Kenfack, Anatole and Koppitz, Michael and Manz, J{\"o}rn and Marquardt, Falko and K. Paramonov, Guennaddi}, title = {Concerted Quantum Effects of Electronic and Nuclear Fluxes in Molecules}, series = {Chem. Phys. Lett.}, volume = {481}, journal = {Chem. Phys. Lett.}, number = {1-3}, publisher = {Elsevier}, doi = {10.1016/j.cplett.2009.09.011}, pages = {118 -- 123}, year = {2009}, language = {en} } @inproceedings{ZachowHegeDeuflhard2004, author = {Zachow, Stefan and Hege, Hans-Christian and Deuflhard, Peter}, title = {Computergest{\"u}tzte Operationsplanung in der Gesichtschirurgie}, series = {Proc. VDE Kongress 2004 - Innovationen f{\"u}r Menschen, Band 2, Fachtagungsberichte DGBMT - GMM - GMA}, booktitle = {Proc. VDE Kongress 2004 - Innovationen f{\"u}r Menschen, Band 2, Fachtagungsberichte DGBMT - GMM - GMA}, pages = {53 -- 58}, year = {2004}, language = {en} } @article{ZachowHegeDeuflhard2006, author = {Zachow, Stefan and Hege, Hans-Christian and Deuflhard, Peter}, title = {Computer assisted planning in cranio-maxillofacial surgery}, series = {Journal of Computing and Information Technology}, volume = {14(1)}, journal = {Journal of Computing and Information Technology}, pages = {53 -- 64}, year = {2006}, language = {en} } @inproceedings{VosTielbeekNazirogluetal.2012, author = {Vos, Franciscus and Tielbeek, Jeroen and Naziroglu, Robiel and Li, Zhang and Schueffler, Peter and Mahapatra, Dwarikanath and Wiebel, Alexander and Lavini, Christina and Buhmann, Joachim and Hege, Hans-Christian and Stoker, Jaap and van Vliet, Lucas}, title = {Computational modeling for assessment of IBD: to be or not to be?}, series = {2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)}, booktitle = {2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)}, doi = {10.1109/EMBC.2012.6346837}, pages = {3974 -- 3977}, year = {2012}, language = {en} } @misc{WiebelPreisVosetal., author = {Wiebel, Alexander and Preis, Philipp and Vos, Frans M. and Hege, Hans-Christian}, title = {Computation and Application of 3D Strokes on Visible Structures in Direct Volume Rendering}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-18070}, abstract = {In this paper we describe VisiTrace, a novel technique to draw 3D lines in 3D volume rendered images. It allows to draw strokes in the 2D space of the screen to produce 3D lines that run on top or in the center of structures actually visible in the volume rendering. It can handle structures that only shortly occlude the structure that has been visible at the starting point of the stroke and is able to ignore such structures. For this purpose a shortest path algorithm finding the optimal curve in a specially designed graph data structure is employed. We demonstrate the usefulness of the technique by applying it to MRI data from medicine and engineering, and show how the method can be used to mark or analyze structures in the example data sets, and to automatically obtain good views toward the selected structures.}, language = {en} } @inproceedings{WeinkaufHegeNoacketal.2003, author = {Weinkauf, Tino and Hege, Hans-Christian and Noack, Bernd and Schlegel, Michael and Dillmann, Andreas}, title = {Coherent structures in a transitional flow around a backward-facing step}, series = {Physics of Fluids}, volume = {15}, booktitle = {Physics of Fluids}, editor = {Ajaev, V. and Willis, D.}, pages = {S3}, year = {2003}, language = {en} } @inproceedings{ClasenHege2007, author = {Clasen, Malte and Hege, Hans-Christian}, title = {Clipmap-based Terrain Data Synthesis}, series = {Proc. SimVis 2007}, booktitle = {Proc. SimVis 2007}, editor = {Schulze, Thomas and Preim, Bernhard and Schumann, Heidrun}, publisher = {SCS Publishing House e.V.}, pages = {385 -- 398}, year = {2007}, language = {en} } @article{GellermannWustStallingetal.2000, author = {Gellermann, Johanna and Wust, Peter and Stalling, Detlev and Seebaß, Martin and Nadobny, Jacek and Hege, Hans-Christian and Deuflhard, Peter and Felix, Roland}, title = {Clinical evaluation and verification of the hyperthermia treatment planning system HyperPlan}, series = {Int. J. Radiat. Oncol. Biol. Phys.}, volume = {47(4)}, journal = {Int. J. Radiat. Oncol. Biol. Phys.}, doi = {10.1016/S0360-3016(00)00425-9}, pages = {1145 -- 1156}, year = {2000}, language = {en} } @article{GoubergritsTimmelAffeldetal.2006, author = {Goubergrits, Leonid and Timmel, Tobias and Affeld, Klaus and Petz, Christoph and Stalling, Detlev and Hege, Hans-Christian}, title = {Characterization of an artificial valve flow using the numerical dye washout visualization technique}, series = {Artificial Organs}, volume = {30(8)}, journal = {Artificial Organs}, pages = {642 -- 650}, year = {2006}, language = {en} } @inproceedings{WenckebachLameckerHege2005, author = {Wenckebach, Thomas and Lamecker, Hans and Hege, Hans-Christian}, title = {Capturing anatomical shape variability using B-spline registration}, series = {Information Processing in Medical Imaging: 19th International Conference (IPMI 2005)}, volume = {3565/2005}, booktitle = {Information Processing in Medical Imaging: 19th International Conference (IPMI 2005)}, editor = {Christensen, Gary and Sonka, Milan}, publisher = {Springer-Verlag GmbH}, address = {Glenwood Springs, CO, USA}, doi = {10.1007/b137723}, pages = {578 -- 590}, year = {2005}, language = {en} } @article{AllenBengerDramlitschetal.2001, author = {Allen, Gabrielle and Benger, Werner and Dramlitsch, Thomas and Goodale, Tom and Hege, Hans-Christian and Lanfermann, Gerd and Merzky, Andr{\´e} and Radtke, Thomas and Seidel, Edward and Shalf, John}, title = {Cactus Tools for Grid Applications}, series = {Cluster Computing}, volume = {4}, journal = {Cluster Computing}, number = {3}, doi = {10.1023/A:1011491422534}, pages = {179 -- 188}, year = {2001}, language = {en} } @inproceedings{AllenBengerDramlitschetal.2001, author = {Allen, Gabrielle and Benger, Werner and Dramlitsch, Thomas and Goodale, Tom and Hege, Hans-Christian and Lanfermann, Gerd and Merzky, Andr{\´e} and Radke, Thomas and Seidel, Edward}, title = {Cactus Grid Computing: Review of Current Devlopment}, series = {Proceedings of Euro-Par 2001: 7th International Euro-Par Conference on Parallel Processing}, volume = {2150}, booktitle = {Proceedings of Euro-Par 2001: 7th International Euro-Par Conference on Parallel Processing}, editor = {Sakellariou, Rizos and Keane, Jon and Gurd, John and Freeman, Len}, publisher = {Springer Verlag, Berlin Heidelberg 2001}, doi = {10.1007/3-540-44681-8_115}, pages = {817 -- 824}, year = {2001}, language = {en} } @inproceedings{WeinkaufTheiselHegeetal.2004, author = {Weinkauf, Tino and Theisel, Holger and Hege, Hans-Christian and Seidel, Hans-Peter}, title = {Boundary switch connectors for topological visualization of complex 3D vector fields}, series = {Proc. Joint Eurographics - IEEE TCVG Symposium on Visualization (VisSym '04)}, booktitle = {Proc. Joint Eurographics - IEEE TCVG Symposium on Visualization (VisSym '04)}, address = {Konstanz, Germany}, pages = {183 -- 192}, year = {2004}, language = {en} } @inproceedings{SchirmacherZoecklerStallingetal.1998, author = {Schirmacher, Hartmut and Z{\"o}ckler, Malte and Stalling, Detlev and Hege, Hans-Christian}, title = {Boundary Surface Shrinking - a Continuous Approach to 3D Center Line Extraction}, series = {Proc. of IMDSP'98, held in Alpbach}, booktitle = {Proc. of IMDSP'98, held in Alpbach}, editor = {Girod, Bernd and Niemann, Heinrich and Seidel, Hans}, address = {Austria}, pages = {25 -- 28}, year = {1998}, language = {en} } @inproceedings{PapazovHege, author = {Papazov, Chavdar and Hege, Hans-Christian}, title = {Blue-noise Optimized Point Sets Based on Procrustes Analysis}, series = {SIGGRAPH Asia 2017 Technical Briefs}, booktitle = {SIGGRAPH Asia 2017 Technical Briefs}, doi = {10.1145/3145749.3149442}, pages = {20:1 -- 20:4}, language = {en} } @misc{PapazovHege, author = {Papazov, Chavdar and Hege, Hans-Christian}, title = {Blue-noise Optimized Point Sets Based on Procrustes Analysis}, issn = {1438-0064}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-65356}, abstract = {In this paper, we propose a new method for optimizing the blue noise characteristics of point sets. It is based on Procrustes analysis, a technique for adjusting shapes to each other by applying optimal elements of an appropriate transformation group. We adapt this technique to the problem at hand and introduce a very simple, efficient and provably convergent point set optimizer.}, language = {en} } @inproceedings{HanikHegevonTycowicz, author = {Hanik, Martin and Hege, Hans-Christian and von Tycowicz, Christoph}, title = {Bi-invariant Two-Sample Tests in Lie Groups for Shape Analysis}, series = {Shape in Medical Imaging}, booktitle = {Shape in Medical Imaging}, publisher = {Springer International Publishing}, address = {Cham}, doi = {10.1007/978-3-030-61056-2_4}, pages = {44 -- 54}, abstract = {We propose generalizations of the T²-statistics of Hotelling and the Bhattacharayya distance for data taking values in Lie groups. A key feature of the derived measures is that they are compatible with the group structure even for manifolds that do not admit any bi-invariant metric. This property, e.g., assures analysis that does not depend on the reference shape, thus, preventing bias due to arbitrary choices thereof. Furthermore, the generalizations agree with the common definitions for the special case of flat vector spaces guaranteeing consistency. Employing a permutation test setup, we further obtain nonparametric, two-sample testing procedures that themselves are bi-invariant and consistent. We validate our method in group tests revealing significant differences in hippocampal shape between individuals with mild cognitive impairment and normal controls.}, language = {en} } @article{HanikHegevonTycowicz, author = {Hanik, Martin and Hege, Hans-Christian and von Tycowicz, Christoph}, title = {Bi-invariant Dissimilarity Measures for Sample Distributions in Lie Groups}, series = {SIAM Journal on Mathematics of Data Science}, volume = {4}, journal = {SIAM Journal on Mathematics of Data Science}, number = {4}, doi = {10.1137/21M1410373}, pages = {1223 -- 1249}, abstract = {Data sets sampled in Lie groups are widespread, and as with multivariate data, it is important for many applications to assess the differences between the sets in terms of their distributions. Indices for this task are usually derived by considering the Lie group as a Riemannian manifold. Then, however, compatibility with the group operation is guaranteed only if a bi-invariant metric exists, which is not the case for most non-compact and non-commutative groups. We show here that if one considers an affine connection structure instead, one obtains bi-invariant generalizations of well-known dissimilarity measures: a Hotelling \$T^2\$ statistic, Bhattacharyya distance and Hellinger distance. Each of the dissimilarity measures matches its multivariate counterpart for Euclidean data and is translation-invariant, so that biases, e.g., through an arbitrary choice of reference, are avoided. We further derive non-parametric two-sample tests that are bi-invariant and consistent. We demonstrate the potential of these dissimilarity measures by performing group tests on data of knee configurations and epidemiological shape data. Significant differences are revealed in both cases.}, language = {en} } @inproceedings{SeimKainmuellerHelleretal.2008, author = {Seim, Heiko and Kainm{\"u}ller, Dagmar and Heller, Markus O. and Lamecker, Hans and Zachow, Stefan and Hege, Hans-Christian}, title = {Automatic Segmentation of the Pelvic Bones from CT Data Based on a Statistical Shape Model}, series = {Eurographics Workshop on Visual Computing for Biomedicine (VCBM)}, booktitle = {Eurographics Workshop on Visual Computing for Biomedicine (VCBM)}, address = {Delft, Netherlands}, pages = {93 -- 100}, year = {2008}, language = {en} } @inproceedings{LameckerLangeSeebassetal.2003, author = {Lamecker, Hans and Lange, Thomas and Seebaß, Martin and Eulenstein, Sebastian and Westerhoff, Malte and Hege, Hans-Christian}, title = {Automatic Segmentation of the Liver for Preoperative Planning of Resections}, series = {Proc. MMVR 2003}, booktitle = {Proc. 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