@inproceedings{UllmerHutanuBengeretal.2003, author = {Ullmer, Brygg and Hutanu, Andrei and Benger, Werner and Hege, Hans-Christian}, title = {Emerging Tangible Interfaces for Facilitating Collaborative Immersive Visualizations}, booktitle = {Proc. of NSF Lake Tahoe Workshop on Collaborative Virtual Reality and Visualization (extended abstract)}, editor = {Staadt, Oliver}, year = {2003}, language = {en} } @inproceedings{TheiselWeinkaufHegeetal.2003, author = {Theisel, Holger and Weinkauf, Tino and Hege, Hans-Christian and Seidel, Hans-Peter}, title = {Saddle Connectors - An Approach to Visualizing the Topological Skeleton of Complex 3D Vector Fields}, booktitle = {Proc. IEEE Visualization 2003}, address = {Seattle}, doi = {10.1109/VISUAL.2003.1250376}, pages = {225 -- 232}, year = {2003}, 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}, volume = {15}, booktitle = {Physics of Fluids}, editor = {Ajaev, V. and Willis, D.}, pages = {S3}, year = {2003}, language = {en} } @inproceedings{HegeHutanuKaehleretal.2003, author = {Hege, Hans-Christian and Hutanu, Andrei and K{\"a}hler, Ralf and Merzky, Andr{\´e} and Radke, Thomas and Seidel, Edward and Ullmer, Brygg}, title = {Progressive Retrieval and Hierarchical Visualization of Large Remote Data}, booktitle = {Proceedings of the 2003 Workshop on Adaptive Grid Middleware}, pages = {60 -- 72}, year = {2003}, language = {en} } @article{HegeMerzky2002, author = {Hege, Hans-Christian and Merzky, Andr{\´e}}, title = {GriKSL - Immersive {\"U}berwachung und Steuerung von Simulationen auf entfernten Supercomputern}, journal = {DFN-Mitteilungen, Heft 59}, pages = {5 -- 7}, year = {2002}, language = {en} } @inproceedings{GladilinZachowDeuflhardetal.2002, author = {Gladilin, Evgeny and Zachow, Stefan and Deuflhard, Peter and Hege, Hans-Christian}, title = {Adaptive Nonlinear Elastic FEM for Realistic Prediction of Soft Tissue in Craniofacial Surgery Simulations}, volume = {4681}, booktitle = {Proc. SPIE Medical Imaging 2002}, editor = {K. Mun, Seong}, address = {San Diego, USA}, doi = {10.1117/12.466906}, pages = {1 -- 8}, year = {2002}, language = {en} } @inproceedings{GladilinZachowDeuflhardetal.2002, author = {Gladilin, Evgeny and Zachow, Stefan and Deuflhard, Peter and Hege, Hans-Christian}, title = {Shape-based Modeling Approach for the Estimation of Individual Facial Mimics in Craniofacial Surgery Planning}, volume = {4681}, booktitle = {Proc. SPIE Medical Imaging 2002: Visualization, Image-Guided Procedures, and Display}, editor = {Mun, Seong}, address = {San Diego, USA target}, pages = {242 -- 248}, year = {2002}, language = {en} } @inproceedings{HegeSchirmacherWesterhoffetal.2002, author = {Hege, Hans-Christian and Schirmacher, Hartmut and Westerhoff, Malte and Lamecker, Hans and Prohaska, Steffen and Zachow, Stefan}, title = {From Image Data to Three-Dimensional Models - Case Studies on the Impact of 3D Patient Models}, booktitle = {Proceedings of the Japan Korea Computer Graphics Conference 2002}, publisher = {Kanazawa University}, address = {Kanazawa City, Ishikawa, Japan}, year = {2002}, language = {en} } @article{ProhaskaHegeGiehletal.2002, author = {Prohaska, Steffen and Hege, Hans-Christian and Giehl, Michael and Gowin, Wolfgang}, title = {Visual Analysis of Trabecular Bone Structure}, volume = {9 (1)}, journal = {Journal of Gravitational Physiology}, pages = {171 -- 172}, year = {2002}, language = {en} } @misc{GowinSaparinFelsenbergetal.2002, author = {Gowin, Wolfgang and Saparin, Peter and Felsenberg, Dieter and Kurths, J{\"u}rgen and Zaikin, Alexei and Prohaska, Steffen and Hege, Hans-Christian}, title = {Regional Structural Skeletal Discordance Assessed by Measures of Complexity}, year = {2002}, language = {en} } @article{GowinSaparinProhaskaetal.2002, author = {Gowin, Wolfgang and Saparin, Peter and Prohaska, Steffen and Hege, Hans-Christian and Felsenberg, Dieter}, title = {Femoral Neck Fractures: Reasons for the Most Common Location of Fractures}, volume = {73}, journal = {Acta Orthop. Scand. (Suppl. 304)}, pages = {26}, year = {2002}, language = {en} } @article{LameckerZachowWittmersetal.2006, author = {Lamecker, Hans and Zachow, Stefan and Wittmers, Antonia and Weber, Britta and Hege, Hans-Christian and Elsholtz, Barbara and Stiller, Michael}, title = {Automatic segmentation of mandibles in low-dose CT-data}, volume = {1(1)}, journal = {Int. J. Computer Assisted Radiology and Surgery}, pages = {393 -- 395}, year = {2006}, language = {en} } @article{LameckerZachowHegeetal.2006, author = {Lamecker, Hans and Zachow, Stefan and Hege, Hans-Christian and Z{\"o}ckler, Maja}, title = {Surgical treatment of craniosynostosis based on a statistical 3D-shape model}, volume = {1(1)}, journal = {Int. J. Computer Assisted Radiology and Surgery}, doi = {10.1007/s11548-006-0024-x}, pages = {253 -- 254}, year = {2006}, language = {en} } @inproceedings{BengerHege2006, author = {Benger, Werner and Hege, Hans-Christian}, title = {Analysing curved spacetimes with tensor splats}, volume = {3}, booktitle = {Proceedings of the Tenth Marcel Grossmann Meeting in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories}, publisher = {World Scientific}, address = {Singapore}, doi = {10.1142/9789812704030_0164}, pages = {1619 -- 1624}, year = {2006}, language = {en} } @article{BengerHege2006, author = {Benger, Werner and Hege, Hans-Christian}, title = {Strategies for direct visualization of second-rank tensor fields}, journal = {Visualization and Processing of Tensor Fields}, publisher = {Springer Verlag}, doi = {10.1007/3-540-31272-2_11}, pages = {191 -- 214}, year = {2006}, language = {en} } @article{ZachowHegeDeuflhard2006, author = {Zachow, Stefan and Hege, Hans-Christian and Deuflhard, Peter}, title = {Computer assisted planning in cranio-maxillofacial surgery}, volume = {14(1)}, journal = {Journal of Computing and Information Technology}, pages = {53 -- 64}, year = {2006}, language = {en} } @article{BengerBartschHegeetal.2006, author = {Benger, Werner and Bartsch, Hauke and Hege, Hans-Christian and Kitzler, Hagen and Shumilina, Anna and Werner, Annett}, title = {Visualizing neuronal structures in the human brain via Diffusion Tensor MRI}, volume = {116(4)}, journal = {Int. Journal of Neuroscience}, pages = {461 -- 514}, year = {2006}, language = {en} } @article{MayeWenckebachHege2006, author = {Maye, Alexander and Wenckebach, Thomas and Hege, Hans-Christian}, title = {Visualization, reconstruction, and integration of neuronal structures in digital brain atlases}, volume = {116(4)}, journal = {Int. Journal of Neuroscience}, pages = {431 -- 459}, year = {2006}, language = {en} } @article{ZeilhoferHege2002, author = {Zeilhofer, Hans-Florian and Hege, Hans-Christian}, title = {Operieren im Medizin-Grid}, journal = {DFN-Mitteilungen, Heft 60}, pages = {19 -- 20}, year = {2002}, language = {en} } @article{HegeKaehlerSeideletal.2002, author = {Hege, Hans-Christian and K{\"a}hler, Ralf and Seidel, Edward and Radke, Thomas}, title = {GriKSL zeigt Live-Demos auf der iGrid2002}, journal = {DFN-Mitteilungen, Heft 60}, pages = {21 -- 22}, year = {2002}, language = {en} } @inproceedings{KaehlerCoxPattersonetal.2002, author = {K{\"a}hler, Ralf and Cox, Donna and Patterson, Robert and Levy, Stuart and Hege, Hans-Christian and Abel, Tom}, title = {Rendering The First Star in The Universe - A Case Study}, booktitle = {Proceedings of IEEE Visualization 2002}, editor = {J. Moorhead, Robert and Gross, Markus and I. Joy, Kenneth}, publisher = {IEEE Computer Society Press}, address = {Boston MA, USA}, doi = {10.1109/VISUAL.2002.1183824}, pages = {537 -- 540}, year = {2002}, language = {en} } @inproceedings{ProhaskaHege2002, author = {Prohaska, Steffen and Hege, Hans-Christian}, title = {Fast Visualization of Plane-Like Structures in Voxel Data}, booktitle = {Proceedings of IEEE Visualization 2002}, editor = {J. Moorhead, Robert and Gross, Markus and I. Joy, Kenneth}, publisher = {IEEE Computer Society Press}, address = {Boston MA, USA}, doi = {10.1109/VISUAL.2002.1183753}, pages = {29 -- 36}, year = {2002}, language = {en} } @inproceedings{SchmidtEhrenbergBaumHege2002, author = {Schmidt-Ehrenberg, Johannes and Baum, Daniel and Hege, Hans-Christian}, title = {Visualizing Dynamic Molecular Conformations}, booktitle = {Proceedings of IEEE Visualization 2002}, editor = {J. Moorhead, Robert and Gross, Markus and I. Joy, Kenneth}, publisher = {IEEE Computer Society Press}, address = {Boston MA, USA}, doi = {10.1109/VISUAL.2002.1183780}, pages = {235 -- 242}, year = {2002}, language = {en} } @inproceedings{CoconuHege2002, author = {Coconu, Liviu and Hege, Hans-Christian}, title = {Hardware-Accelerated Point-Based Rendering of Complex Scenes}, booktitle = {Proceedings of the 13th Eurographics Workshop on Rendering Techniques}, editor = {Gibson, Simon and Debevec, Paul}, address = {Pisa, Italy}, pages = {43 -- 52}, year = {2002}, language = {en} } @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}, volume = {13}, booktitle = {Simulation and Visualization on the Grid}, publisher = {Springer Verlag}, pages = {1 -- 6}, year = {2000}, 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}, booktitle = {Bildverarbeitung f{\"u}r die Medizin 2000 (Abstract)}, address = {M{\"u}nchen}, year = {2000}, language = {en} } @inproceedings{ZachowGladilinHegeetal.2000, author = {Zachow, Stefan and Gladilin, Evgeny and Hege, Hans-Christian and Deuflhard, Peter}, title = {Finite-Element Simulation of Soft Tissue Deformation}, booktitle = {Computer Assisted Radiology and Surgey (CARS)}, publisher = {Elsevier Science B.V.}, pages = {23 -- 28}, year = {2000}, language = {en} } @article{ZoecklerStallingHege2000, author = {Z{\"o}ckler, Malte and Stalling, Detlev and Hege, Hans-Christian}, title = {Fast and Intuitive Generation of Geometric Shape Transitions}, volume = {16(5)}, journal = {The Visual Computer}, doi = {10.1007/PL00013396}, pages = {241 -- 253}, year = {2000}, language = {en} } @inproceedings{BengerHegeHeusler2000, author = {Benger, Werner and Hege, Hans-Christian and Heusler, Stefan}, title = {Visions of Numerical Relativity}, booktitle = {Proceedings of the 3d International Conference on the Interaction of Art and Fluid Mechanics (SCART2000)}, publisher = {Kluwer Academic Publishers}, address = {ETH Z{\"u}rich Zwitzerland}, pages = {239 -- 246}, year = {2000}, language = {en} } @inproceedings{DeuflhardHegeSeebass2000, author = {Deuflhard, Peter and Hege, Hans-Christian and Seebaß, Martin}, title = {Progress Towards a Combined MRI/Hyperthermia System}, booktitle = {Proceedings Second International Congress HIGH CARE 2000}, address = {Bochum}, year = {2000}, language = {en} } @article{HegeBengerMerzkyetal.2000, author = {Hege, Hans-Christian and Benger, Werner and Merzky, Andr{\´e} and Kasper, Friedbert and Radke, Thomas and Seidel, Edward}, title = {Schwarze L{\"o}cher in Sicht - Immersive {\"U}berwachung und Steuerung von Remote-Simulationen}, volume = {52}, journal = {DFN-Mitteilungen}, number = {2}, pages = {4 -- 6}, year = {2000}, language = {en} } @article{AllenGoodaleLanfermannetal.1999, author = {Allen, Gabrielle and Goodale, Tom and Lanfermann, Gerd and Seidel, Edward and Benger, Werner and Hege, Hans-Christian and Merzky, Andr{\´e} and Masso, Joan and Shalf, John}, title = {Solving Einstein's Equations on Supercomputers}, journal = {IEEE Computer}, doi = {10.1109/2.809251}, pages = {52 -- 59}, year = {1999}, 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}, 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{SeebassStallingZoeckleretal.1997, author = {Seebaß, Martin and Stalling, Detlev and Z{\"o}ckler, Malte and Hege, Hans-Christian and Wust, Peter and Felix, Roland and Deuflhard, Peter}, title = {Surface Mesh Generation for Numerical Simulations of Hyperthermia Treatments}, booktitle = {Proceedings of the 16th Annual Meeting of the European Society for Hyperthermic Oncology (ESHO-97)}, pages = {146}, year = {1997}, language = {en} } @inproceedings{DeuflhardSeebassStallingetal.1997, author = {Deuflhard, Peter and Seebaß, Martin and Stalling, Detlev and Beck, Rudolf and Hege, Hans-Christian}, title = {Hyperthermia Treatment Planning in Clinical Therapy}, booktitle = {Computational Physics, Chemistry and Biology (Proceedings of the 15th IMACS World Congress 1997 on Scientific Computation 3, Modelling and Applied Mathematics)}, editor = {Sydow, Achim}, publisher = {Wissenschaft und Technik Verlag}, pages = {9 -- 17}, year = {1997}, language = {en} } @inproceedings{NadobnyWustStallingetal.1997, author = {Nadobny, Jacek and Wust, Peter and Stalling, Detlev and Hege, Hans-Christian and Deuflhard, Peter and Felix, Roland}, title = {A Quantitative Comparison Between VSIE and the FDTD Method Using Electrically Equivalent Patient and Antenna Models}, booktitle = {Proceedings of 16th Annual Meeting of the European Society for Hyperthermic Oncology ESHO-97}, address = {Berlin, Germany}, pages = {145}, year = {1997}, language = {en} } @inproceedings{WustNadobnyGellermannetal.1997, author = {Wust, Peter and Nadobny, Jacek and Gellermann, Johanna and Seebaß, Martin and Stalling, Detlev and Hege, Hans-Christian and Deuflhard, Peter and Felix, Roland}, title = {Patient Models and Algorithms for Hyperthermia Planning}, booktitle = {Proceedings of the 16th Annual Meeting of the European Society for Hyperthermic Oncology ESHO-97}, year = {1997}, language = {en} } @inproceedings{ZoecklerStallingHege1996, author = {Z{\"o}ckler, Malte and Stalling, Detlev and Hege, Hans-Christian}, title = {Parallel Line Integral Convolution}, booktitle = {Proc. First Eurographics Workshop on Parallel Graphics and Visualization}, address = {Bristol, U.K.}, doi = {10.1016/S0167-8191(97)00039-2}, pages = {111 -- 128}, year = {1996}, language = {en} } @incollection{BattkeStallingHege1996, author = {Battke, Henrik and Stalling, Detlev and Hege, Hans-Christian}, title = {Fast Line Integral Convolution for Arbitrary Surfaces in 3D}, booktitle = {Visualization and Mathematics 1997}, editor = {Hege, Hans-Christian and Polthier, Konrad}, publisher = {Springer, Heidelberg}, pages = {181 -- 195}, year = {1996}, language = {en} } @inproceedings{ZoecklerStallingHege1996, author = {Z{\"o}ckler, Malte and Stalling, Detlev and Hege, Hans-Christian}, title = {Interactive Visualization of 3D-Vector Fields Using Illuminated Streamlines}, booktitle = {Proc. IEEE Visualization 1996}, address = {San Fransisco}, doi = {10.1109/VISUAL.1996.567777}, pages = {107 -- 113}, year = {1996}, language = {en} } @incollection{BeckDeuflhardHegeetal.1996, author = {Beck, Rudolf and Deuflhard, Peter and Hege, Hans-Christian and Seebaß, Martin and Stalling, Detlev}, title = {Numerical Algorithms and Visualization in Medical Treatment Planning}, booktitle = {Visualization and Mathematics 1997}, editor = {Hege, Hans-Christian and Polthier, Konrad}, publisher = {Springer, Heidelberg}, pages = {303 -- 328}, year = {1996}, language = {en} } @article{HegeHoellererStalling1996, author = {Hege, Hans-Christian and H{\"o}llerer, Tobias and Stalling, Detlev}, title = {Volume Rendering: Mathematical Models and Algorithmic Aspects}, journal = {Partielle Differentialgleichungen, Numerik und Anwendungen, Konferenzen des Forschungszentrum J{\"u}lich GmbH}, publisher = {W. Nagel}, pages = {227 -- 255}, year = {1996}, language = {en} } @inproceedings{BeckHegeSeebassetal.1996, author = {Beck, Rudolf and Hege, Hans-Christian and Seebaß, Martin and Wust, Peter and Deuflhard, Peter and Felix, Roland}, title = {Adaptive Finite Element Codes for Numerical Calculations in Hyperthermia Treatment Planning}, volume = {2}, booktitle = {Proceedings of the 17th Congress on Hyperthermic Oncology}, address = {Rome, Italy}, pages = {515 -- 517}, year = {1996}, language = {en} } @inproceedings{StallingHege1996, author = {Stalling, Detlev and Hege, Hans-Christian}, title = {Intelligent Scissors for Medical Image Segmentation}, booktitle = {Tagungsband zum 4. Freiburger Workshop Digitale Bildverarbeitung in der Medizin}, address = {Freiburg}, pages = {32 -- 36}, year = {1996}, language = {en} } @inproceedings{StallingSeebassHegeetal.1996, author = {Stalling, Detlev and Seebaß, Martin and Hege, Hans-Christian and Wust, Peter and Deuflhard, Peter and Felix, Roland}, title = {HyperPlan - an Integrated System for Treatment Planning in Regional Hyperthermia}, volume = {2}, booktitle = {Proceedings of the 17th Congress on Hyperthermic Oncology}, address = {Rome, Italy}, pages = {552 -- 554}, year = {1996}, language = {en} } @article{HegeStueben1995, author = {Hege, Hans-Christian and St{\"u}ben, Hinnerk}, title = {Daten "sehen" - Wissenschaftliche Visualisierung im RTB Berlin}, volume = {38}, journal = {DFN Mitteilungen}, pages = {10 -- 12target}, year = {1995}, language = {en} } @article{AkemideForcrandFujisakietal.1995, author = {Akemi, K. and deForcrand, Ph. and Fujisaki, M. and Hashimoto, T. and Hege, Hans-Christian and Hioki, S. and Miyamura, O. and Nakamura, A. and Okuda, M. and Stamatescu, I. O. and Tago, Yoshio and Takaishi, T.}, title = {Quantum Chromodynamics Simulations on a Non-Dedicated Highly Parallel Computer}, volume = {90}, journal = {Comp. Phys. Comm}, doi = {10.1016/0010-4655(95)00082-Q}, pages = {201 -- 214}, year = {1995}, language = {en} } @inproceedings{DeuflhardHege1994, author = {Deuflhard, Peter and Hege, Hans-Christian}, title = {Scientific Computing in der Theoretischen Physik - Collected Abstracts}, booktitle = {Tagung organisiert von der DMV-Fachgruppe Scientific Computing in Kooperation mit dem GAMM Fachausschuss Scientific Computing}, address = {Berlin}, year = {1994}, language = {en} } @inproceedings{GrammelBackWunderlingetal.1994, author = {Grammel, Martin and Back, Godmar and Wunderling, Roland and Hege, Hans-Christian}, title = {Ein paralleles C++/C-Programmiermodell f{\"u}r ein objektorientiertes B\&C-Framework}, volume = {13}, booktitle = {GI/ITG-Workshop, Sept.1994, Mitteilungen der Fachgruppe PARS der Gesellschaft f{\"u}r Informatik (GI)}, address = {Potsdam}, pages = {50 -- 59}, year = {1994}, language = {en} } @inproceedings{WunderlingGrammelHege1994, author = {Wunderling, Roland and Grammel, Martin and Hege, Hans-Christian}, title = {Parallele LU-Zerlegung großer, unsymmetrischer, d{\"u}nn besetzter Matrizen bei hohen Kommunikationslatenzen}, volume = {13}, booktitle = {GI/ITG-Workshop, Sept.1994, Mitteilungen der Fachgruppe PARS der Gesellschaft f{\"u}r Informatik (GI)}, address = {Potsdam}, pages = {191 -- 200}, year = {1994}, language = {en} } @article{Hege1994, author = {Hege, Hans-Christian}, title = {Scaling study of pure SU(3) theory - the QCD-TARO collaboration}, 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}, 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}, 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}, volume = {30}, journal = {Nucl. Phys. B Proc. Suppl.}, doi = {10.1016/0920-5632(93)90230-4}, pages = {373 -- 376}, year = {1993}, language = {en} } @article{WustGellermannBeieretal.1998, author = {Wust, Peter and Gellermann, Johanna and Beier, J{\"u}rgen and Wegner, Susan and Tilly, Wolfgang and Tr{\"o}ger, Jens and Stalling, Detlev and Hege, Hans-Christian and Deuflhard, Peter and Felix, Roland}, title = {Evaluation of Segmentation Algorithms for Generation of Patient Models in Radiofrequency Hyperthermia}, volume = {43 (11)}, journal = {Phys. Med. Biol.}, doi = {10.1088/0031-9155/43/11/009}, pages = {3295 -- 3307}, year = {1998}, language = {en} } @inproceedings{HegeStalling1997, author = {Hege, Hans-Christian and Stalling, Detlev}, title = {LIC: Acceleration, Animation, Zoom}, booktitle = {Texture Synthesis with Line Integral Convolution, Siggraph 97, 24. Int. Conf. Computer Graphics and Interactive Techniques}, address = {Los Angeles}, pages = {17 -- 49}, year = {1997}, language = {en} } @inproceedings{StallingHege1997, author = {Stalling, Detlev and Hege, Hans-Christian}, title = {LIC on Surfaces}, booktitle = {Texture Synthesis with Line Integral Convolution, Siggraph 97, 24. Int. Conf. Computer Graphics and Interactive Techniques}, address = {Los Angeles}, pages = {51 -- 64}, year = {1997}, language = {en} } @article{StallingZoecklerHege1997, author = {Stalling, Detlev and Z{\"o}ckler, Malte and Hege, Hans-Christian}, title = {Fast Display of Illuminated Field Lines}, volume = {3}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = {2}, doi = {10.1109/2945.597795}, pages = {118 -- 128}, year = {1997}, language = {en} } @incollection{HegeStalling1998, author = {Hege, Hans-Christian and Stalling, Detlev}, title = {Fast LIC with Piecewise Polynomial Filter Kernels}, booktitle = {Mathematical Visualization - Algorithms and Applications}, editor = {Hege, Hans-Christian and Polthier, Konrad}, publisher = {Springer-Verlag Berlin}, pages = {295 -- 314}, year = {1998}, language = {en} } @inproceedings{StallingZoecklerHege1998, author = {Stalling, Detlev and Z{\"o}ckler, Malte and Hege, Hans-Christian}, title = {Segmentation of 3D Medical Images with Subvoxel Accuracy}, booktitle = {Proc. CARS '98 Computer Assisted Radiology and Surgery}, address = {Tokyo}, pages = {137 -- 142}, year = {1998}, language = {en} } @article{WustNadobnySeebassetal.1999, author = {Wust, Peter and Nadobny, Jacek and Seebaß, Martin and Stalling, Detlev and Gellermann, Johanna and Hege, Hans-Christian and Deuflhard, Peter}, title = {Influence of Patient Models and Numerical Methods on Predicted Power Deposition Patterns}, volume = {15}, journal = {Int. Journal Hyperthermia}, number = {6}, pages = {519 -- 540}, year = {1999}, language = {en} } @inproceedings{SeebassStallingHegeetal.1998, author = {Seebaß, Martin and Stalling, Detlev and Hege, Hans-Christian and Wust, Peter and Felix, Roland and Deuflhard, Peter}, title = {New Features of HyperPlan, a Hyperthermia Planning System}, booktitle = {Proc. Hyperthermia in Clincal Oncology}, address = {Venice}, pages = {16}, year = {1998}, 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}, 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} } @article{Hege1996, author = {Hege, Hans-Christian}, title = {Problems and Solutions: Product of Chebyshev Polynomials}, volume = {6 (2)}, journal = {Orthogonal Polynomials and Special Functions}, pages = {12}, year = {1996}, language = {en} } @inproceedings{HoellererToenniesHegeetal.1995, author = {H{\"o}llerer, Tobias and T{\"o}nnies, Klaus and Hege, Hans-Christian and Stalling, Detlev}, title = {Volume Rendering on Irregular Grids (Abstract)}, booktitle = {Int. Workshop on Mathematics and Visualization}, address = {Berlin, Germany}, 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}, 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}, 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} } @inproceedings{StallingHege1995, author = {Stalling, Detlev and Hege, Hans-Christian}, title = {Design and Implementation of a Hyperthermia Planning System}, booktitle = {Tagungsband zum 4. Freiburger Workshop Digitale Bildverarbeitung in der Medizin}, address = {Freiburg/Breisgau}, year = {1995}, language = {en} } @inproceedings{StallingHegeHoellerer1995, author = {Stalling, Detlev and Hege, Hans-Christian and H{\"o}llerer, Tobias}, title = {Visualization and 3D-Interaction for Hyperthermia Treatment Planning}, booktitle = {Proc. CAR 95 Computer Assisted Radiology, 9th International Symposium and Exhibition}, address = {Berlin}, pages = {1216 -- 1222}, year = {1995}, language = {en} } @article{HashimotoHege1993, author = {Hashimoto, T. and Hege, Hans-Christian}, title = {Monte Carlo Renormalization Study at Large beta in the Confinement Region}, 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}, 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}, journal = {Nucl. Phys. B Proc. Suppl. 26}, doi = {10.1016/0920-5632(92)90257-S}, pages = {293 -- 295}, year = {1992}, language = {en} } @article{AkemiForcrandFujisakietal.1992, author = {Akemi, K. and Forcrand, Ph. de and Fujisaki, M. and Hashimoto, T. and Hege, Hans-Christian and Hioki, S. and Makino, J. and Miyamura, O. and Nakamura, A. and Okuda, M. and Stamatescu, I. O. and Tago, Yoshio and Takaishi, T.}, title = {SU(3) Renormalization Group Study on Parallel Computer AP 1000}, journal = {Nucl. Phys. B Proc. Suppl. 26}, doi = {10.1016/0920-5632(92)90293-2}, pages = {420 -- 422}, year = {1992}, language = {en} } @article{AkemiForcrandFujisakietal.1992, author = {Akemi, K. and Forcrand, Ph. de and Fujisaki, M. and Hashimoto, T. and Hege, Hans-Christian and Hioki, S. and Makino, J. and Miyamura, O. and Nakamura, A. and Okuda, M. and Stamatescu, I. O. and Tago, Yoshio and Takaishi, T.}, title = {QCD on the Highly Parallel Computer AP 1000}, journal = {Nucl. Phys. B Proc. Suppl. 26}, doi = {10.1016/0920-5632(92)90358-Y}, pages = {644 -- 646}, year = {1992}, language = {en} } @inproceedings{HegeStueben1991, author = {Hege, Hans-Christian and St{\"u}ben, Hinnerk}, title = {Vectorization and Parallelization of Irregular Problems via Graph Coloring}, booktitle = {Proc. of the ACM Int. Conf. on Supercomputing}, address = {Cologne}, doi = {10.1145/109025.109042}, pages = {47 -- 56}, year = {1991}, language = {en} } @article{DercksenHegeOberlaender2014, author = {Dercksen, Vincent J. and Hege, Hans-Christian and Oberlaender, Marcel}, title = {The Filament Editor: An Interactive Software Environment for Visualization, Proof-Editing and Analysis of 3D Neuron Morphology}, volume = {12}, journal = {NeuroInformatics}, number = {2}, publisher = {Springer US}, doi = {10.1007/s12021-013-9213-2}, pages = {325 -- 339}, year = {2014}, language = {en} } @article{LindowBaumLeborgneetal.2019, author = {Lindow, Norbert and Baum, Daniel and Leborgne, Morgan and Hege, Hans-Christian}, title = {Interactive Visualization of RNA and DNA Structures}, volume = {25}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = {1}, doi = {10.1109/TVCG.2018.2864507}, pages = {967 -- 976}, year = {2019}, abstract = {The analysis and visualization of nucleic acids (RNA and DNA) is playing an increasingly important role due to their fundamental importance for all forms of life and the growing number of known 3D structures of such molecules. The great complexity of these structures, in particular, those of RNA, demands interactive visualization to get deeper insights into the relationship between the 2D secondary structure motifs and their 3D tertiary structures. Over the last decades, a lot of research in molecular visualization has focused on the visual exploration of protein structures while nucleic acids have only been marginally addressed. In contrast to proteins, which are composed of amino acids, the ingredients of nucleic acids are nucleotides. They form structuring patterns that differ from those of proteins and, hence, also require different visualization and exploration techniques. In order to support interactive exploration of nucleic acids, the computation of secondary structure motifs as well as their visualization in 2D and 3D must be fast. Therefore, in this paper, we focus on the performance of both the computation and visualization of nucleic acid structure. We present a ray casting-based visualization of RNA and DNA secondary and tertiary structures, which enables for the first time real-time visualization of even large molecular dynamics trajectories. Furthermore, we provide a detailed description of all important aspects to visualize nucleic acid secondary and tertiary structures. With this, we close an important gap in molecular visualization.}, language = {en} } @article{AgudoJacomeHegePaetschetal.2018, author = {Agudo J{\´a}come, Leonardo and Hege, Hans-Christian and Paetsch, Olaf and P{\"o}thkow, Kai}, title = {Three-dimensional reconstruction and quantification of dislocation substructures from transmission electron microscopy stereo pairs}, volume = {195}, journal = {Ultramicroscopy}, doi = {10.1016/j.ultramic.2018.08.015}, pages = {157 -- 170}, year = {2018}, abstract = {A great amount of material properties is strongly influenced by dislocations, the carriers of plastic deformation. It is therefore paramount to have appropriate tools to quantify dislocation substructures with regard to their features, e.g., dislocation density, Burgers vectors or line direction. While the transmission electron microscope (TEM) has been the most widely-used equipment implemented to investigate dislocations, it usually is limited to the two-dimensional (2D) observation of three-dimensional (3D) structures. We reconstruct, visualize and quantify 3D dislocation substructure models from only two TEM images (stereo pairs) and assess the results. The reconstruction is based on the manual interactive tracing of filiform objects on both images of the stereo pair. The reconstruction and quantification method are demonstrated on dark field (DF) scanning (S)TEM micrographs of dislocation substructures imaged under diffraction contrast conditions. For this purpose, thick regions (>300 nm) of TEM foils are analyzed, which are extracted from a Ni-base superalloy single crystal after high temperature creep deformation. It is shown how the method allows 3D quantification from stereo pairs in a wide range of tilt conditions, achieving line length and orientation uncertainties of 3\% and 7°, respectively. Parameters that affect the quality of such reconstructions are discussed.}, language = {en} } @inproceedings{CoconuUllmerPaaretal.2018, author = {Coconu, Liviu and Ullmer, Brygg and Paar, Philip and Liu, Jing and Konkel, Miriam and Hege, Hans-Christian}, title = {A smartphone-based tangible interaction approach for landscape visualization.}, booktitle = {PerDis '18 Proceedings of the 7th ACM International Symposium on Pervasive Displays, Munich, Germany, June 6-8, 2018}, publisher = {ACM}, address = {New York, NY, USA}, doi = {10.1145/3205873.3210707}, pages = {no. 23}, year = {2018}, abstract = {The use of tangible interfaces for navigation of landscape scenery - for example, lost places re-created in 3D - has been pursued and articulated as a promising, impactful application of interactive visualization. In this demonstration, we present a modern, low-cost implementation of a previously-realized multimodal gallery installation. Our demonstration centers upon the versatile usage of a smartphone for sensing, navigating, and (optionally) displaying element on a physical surface in tandem with a larger, more immersive display.}, language = {en} } @inproceedings{UllmerPaarCoconuetal.2018, author = {Ullmer, Brygg and Paar, Philip and Coconu, Liviu and Liu, Jing and Konkel, Miriam and Hege, Hans-Christian}, title = {An 1834 mediterranean garden in Berlin - engaged from 2004, 2018, 2032, and 2202}, booktitle = {PerDis '18 - 7th ACM International Symposium on Pervasive Displays, Munich, Germany, June 6-8, 2018}, publisher = {ACM}, address = {New York, NY, USA}, doi = {10.1145/3205873.3205894}, pages = {no. 12}, year = {2018}, abstract = {In 2004, a team of researchers realized a semi-immersive interactive gallery installation, visualizing an 1834 Mediterranean garden, introduced as "italienisches Kunstst{\"u}ck" (Italian legerdemain) by Peter Joseph Lenn{\´e}. The park was originally realized on the grounds of Schloss Sanssouci in Potsdam, Germany. The installation centered on highly detailed renderings of hundreds of plants projected upon a panoramic display. Interactivity was expressed with a tangible interface which (while presently dated) we believe remains without near-precedent then or since. We present the installation (experienced by roughly 20,000 visitors), focusing on the interaction aspects. We introduce new book and table/door-format mockups. Drawing upon a heuristic of the scientist-philosopher Freeman Dyson, we consider grounded future prospect variations in the contexts of 2018, 2032, and 2202. We see this exercise as prospectively generalizing to a variety of similar and widely diverse application domains.}, language = {en} } @article{BaumLindowHegeetal.2017, author = {Baum, Daniel and Lindow, Norbert and Hege, Hans-Christian and Lepper, Verena and Siopi, Tzulia and Kutz, Frank and Mahlow, Kristin and Mahnke, Heinz-Eberhard}, title = {Revealing hidden text in rolled and folded papyri}, volume = {123}, journal = {Applied Physics A}, number = {3}, doi = {10.1007/s00339-017-0808-6}, pages = {171}, year = {2017}, abstract = {Ancient Egyptian papyri are often folded, rolled up or kept as small packages, sometimes even sealed. Physically unrolling or unfolding these packages might severely damage them. We demonstrate a way to get access to the hidden script without physical unfolding by employing computed tomography and mathematical algorithms for virtual unrolling and unfolding. Our algorithmic approaches are combined with manual interaction. This provides the necessary flexibility to enable the unfolding of even complicated and partly damaged papyrus packages. In addition, it allows us to cope with challenges posed by the structure of ancient papyrus, which is rather irregular, compared to other writing substrates like metallic foils or parchment. Unfolding of packages is done in two stages. In the first stage, we virtually invert the physical folding process step by step until the partially unfolded package is topologically equivalent to a scroll or a papyrus sheet folded only along one fold line. To minimize distortions at this stage, we apply the method of moving least squares. In the second stage, the papyrus is simply flattened, which requires the definition of a medial surface. We have applied our software framework to several papyri. In this work, we present the results of applying our approaches to mockup papyri that were either rolled or folded along perpendicular fold lines. In the case of the folded papyrus, our approach represents the first attempt to address the unfolding of such complicated folds.}, language = {en} } @inproceedings{RitterProhaskaBrandetal.2011, author = {Ritter, Zully and Prohaska, Steffen and Brand, R. and Friedmann, A. and Hege, Hans-Christian and Goebbels, J{\"u}rgen and Felsenberg, Dieter}, title = {Osteocytes number and volume in osteoporotic and in healthy bone biopsies analysed using Synchrotron CT: a pilot study}, booktitle = {Proc. ISB 2011}, year = {2011}, language = {en} } @article{KainmuellerLameckerHelleretal.2013, author = {Kainm{\"u}ller, Dagmar and Lamecker, Hans and Heller, Markus O. and Weber, Britta and Hege, Hans-Christian and Zachow, Stefan}, title = {Omnidirectional Displacements for Deformable Surfaces}, volume = {17}, journal = {Medical Image Analysis}, number = {4}, publisher = {Elsevier}, doi = {10.1016/j.media.2012.11.006}, pages = {429 -- 441}, year = {2013}, language = {en} } @inproceedings{KastenZoufahlHegeetal.2012, author = {Kasten, Jens and Zoufahl, Andre and Hege, Hans-Christian and Hotz, Ingrid}, title = {Analysis of Vortex Merge Graphs}, booktitle = {VMV 2012: Vision, Modeling and Visualization}, publisher = {Eurographics Association}, doi = {10.2312/PE/VMV/VMV12/111-118}, pages = {111 -- 118}, year = {2012}, language = {en} } @inproceedings{KastenHotzNoacketal.2012, author = {Kasten, Jens and Hotz, Ingrid and Noack, Bernd and Hege, Hans-Christian}, title = {Vortex Merge Graphs in Two-dimensional Unsteady Flow Fields}, booktitle = {EuroVis - Short Papers}, publisher = {Eurographics Association}, address = {Vienna, Austria}, doi = {10.2312/PE/EuroVisShort/EuroVisShort2012/001-005}, pages = {1 -- 5}, year = {2012}, language = {en} } @article{KroneKozlikovaLindowetal.2016, author = {Krone, Michael and Kozl{\´i}kov{\´a}, Barbora and Lindow, Norbert and Baaden, Marc and Baum, Daniel and Parulek, Julius and Hege, Hans-Christian and Viola, Ivan}, title = {Visual Analysis of Biomolecular Cavities: State of the Art}, volume = {35}, journal = {Computer Graphics Forum}, number = {3}, issn = {1467-8659}, doi = {10.1111/cgf.12928}, pages = {527 -- 551}, year = {2016}, abstract = {In this report we review and structure the branch of molecular visualization that is concerned with the visual analysis of cavities in macromolecular protein structures. First the necessary background, the domain terminology, and the goals of analytical reasoning are introduced. Based on a comprehensive collection of relevant research works, we present a novel classification for cavity detection approaches and structure them into four distinct classes: grid-based, Voronoi-based, surface-based, and probe-based methods. The subclasses are then formed by their combinations. We match these approaches with corresponding visualization technologies starting with direct 3D visualization, followed with non-spatial visualization techniques that for example abstract the interactions between structures into a relational graph, straighten the cavity of interest to see its profile in one view, or aggregate the time sequence into a single contour plot. We also discuss the current state of methods for the visual analysis of cavities in dynamic data such as molecular dynamics simulations. Finally, we give an overview of the most common tools that are actively developed and used in the structural biology and biochemistry research. Our report is concluded by an outlook on future challenges in the field.}, language = {en} } @article{KramerNoackBaumetal.2015, author = {Kramer, Tobias and Noack, Matthias and Baum, Daniel and Hege, Hans-Christian and Heller, Eric J.}, title = {Homogeneous dust emission and jet structure near active cometary nuclei: the case of 67P/Churyumov-Gerasimenko}, arxiv = {http://arxiv.org/abs/1505.08041}, year = {2015}, abstract = {We compute trajectories of dust grains starting from a homogeneous surface activity-profile on a irregularly shaped cometary nucleus. Despite the initially homogeneous dust distribution a collimation in jet-like structures becomes visible. The fine structure is caused by concave topographical features with similar bundles of normal vectors. The model incorporates accurately determined gravitational forces, rotation of the nucleus, and gas-dust interaction. Jet-like dust structures are obtained for a wide range of gas-dust interactions. For the comet 67P/Churyumov-Gerasimenko, we derive the global dust distribution around the nucleus and find several areas of agreement between the homogeneous dust emission model and the Rosetta observation of dust jets, including velocity-dependent bending of trajectories.}, language = {en} } @inproceedings{AgudoJacomeHegePaetschetal.2016, 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}, booktitle = {Microscopy and Microanalysis 2016, July 24-28 Columbus, Ohio}, year = {2016}, language = {en} } @inproceedings{LindowBaumHege2018, author = {Lindow, Norbert and Baum, Daniel and Hege, Hans-Christian}, title = {Atomic Accessibility Radii for Molecular Dynamics Analysis}, booktitle = {Workshop on Molecular Graphics and Visual Analysis of Molecular Data}, publisher = {The Eurographics Association}, isbn = {978-3-03868-061-1}, doi = {10.2312/molva.20181101}, year = {2018}, abstract = {In molecular structure analysis and visualization, the molecule's atoms are often modeled as hard spheres parametrized by their positions and radii. While the atom positions result from experiments or molecular simulations, for the radii typically values are taken from literature. Most often, van der Waals (vdW) radii are used, for which diverse values exist. As a consequence, different visualization and analysis tools use different atomic radii, and the analyses are less objective than often believed. Furthermore, for the geometric accessibility analysis of molecular structures, vdW radii are not well suited. The reason is that during the molecular dynamics simulation, depending on the force field and the kinetic energy in the system, non-bonded atoms can come so close to each other that their vdW spheres intersect. In this paper, we introduce a new kind of atomic radius, called atomic accessibility radius', that better characterizes the accessibility of an atom in a given molecular trajectory. The new radii reflect the movement possibilities of atoms in the simulated physical system. They are computed by solving a linear program that maximizes the radii of the atoms under the constraint that non-bonded spheres do not intersect in the considered molecular trajectory. Using this data-driven approach, the actual accessibility of atoms can be visualized more precisely.}, language = {en} } @article{NavaYazdaniHegeSullivanetal.2020, author = {Nava-Yazdani, Esfandiar and Hege, Hans-Christian and Sullivan, T. J. and von Tycowicz, Christoph}, title = {Geodesic Analysis in Kendall's Shape Space with Epidemiological Applications}, volume = {62}, journal = {Journal of Mathematical Imaging and Vision}, number = {4}, arxiv = {http://arxiv.org/abs/1906.11950}, doi = {10.1007/s10851-020-00945-w}, pages = {549 -- 559}, year = {2020}, abstract = {We analytically determine Jacobi fields and parallel transports and compute geodesic regression in Kendall's shape space. Using the derived expressions, we can fully leverage the geometry via Riemannian optimization and thereby reduce the computational expense by several orders of magnitude over common, nonlinear constrained approaches. The methodology is demonstrated by performing a longitudinal statistical analysis of epidemiological shape data. As an example application we have chosen 3D shapes of knee bones, reconstructed from image data of the Osteoarthritis Initiative (OAI). Comparing subject groups with incident and developing osteoarthritis versus normal controls, we find clear differences in the temporal development of femur shapes. This paves the way for early prediction of incident knee osteoarthritis, using geometry data alone.}, language = {en} } @inproceedings{NavaYazdaniHegevonTycowicz2019, author = {Nava-Yazdani, Esfandiar and Hege, Hans-Christian and von Tycowicz, Christoph}, title = {A Geodesic Mixed Effects Model in Kendall's Shape Space}, volume = {11846}, booktitle = {Proc. 7th MICCAI workshop on Mathematical Foundations of Computational Anatomy (MFCA)}, doi = {10.1007/978-3-030-33226-6_22}, pages = {209 -- 218}, year = {2019}, abstract = {In many applications, geodesic hierarchical models are adequate for the study of temporal observations. We employ such a model derived for manifold-valued data to Kendall's shape space. In particular, instead of the Sasaki metric, we adapt a functional-based metric, which increases the computational efficiency and does not require the implementation of the curvature tensor. We propose the corresponding variational time discretization of geodesics and apply the approach for the estimation of group trends and statistical testing of 3D shapes derived from an open access longitudinal imaging study on osteoarthritis.}, language = {en} } @inproceedings{HanikHegeHennemuthetal.2020, author = {Hanik, Martin and Hege, Hans-Christian and Hennemuth, Anja and von Tycowicz, Christoph}, title = {Nonlinear Regression on Manifolds for Shape Analysis using Intrinsic B{\´e}zier Splines}, booktitle = {Proc. Medical Image Computing and Computer Assisted Intervention (MICCAI)}, publisher = {Springer International Publishing}, address = {Cham}, arxiv = {http://arxiv.org/abs/2007.05275}, doi = {10.1007/978-3-030-59719-1_60}, pages = {617 -- 626}, year = {2020}, abstract = {Intrinsic and parametric regression models are of high interest for the statistical analysis of manifold-valued data such as images and shapes. The standard linear ansatz has been generalized to geodesic regression on manifolds making it possible to analyze dependencies of random variables that spread along generalized straight lines. Nevertheless, in some scenarios, the evolution of the data cannot be modeled adequately by a geodesic. We present a framework for nonlinear regression on manifolds by considering Riemannian splines, whose segments are B{\´e}zier curves, as trajectories. Unlike variational formulations that require time-discretization, we take a constructive approach that provides efficient and exact evaluation by virtue of the generalized de Casteljau algorithm. We validate our method in experiments on the reconstruction of periodic motion of the mitral valve as well as the analysis of femoral shape changes during the course of osteoarthritis, endorsing B{\´e}zier spline regression as an effective and flexible tool for manifold-valued regression.}, language = {en} } @inproceedings{HanikHegevonTycowicz2020, author = {Hanik, Martin and Hege, Hans-Christian and von Tycowicz, Christoph}, title = {Bi-invariant Two-Sample Tests in Lie Groups for Shape Analysis}, booktitle = {Shape in Medical Imaging}, publisher = {Springer International Publishing}, address = {Cham}, arxiv = {http://arxiv.org/abs/2008.12195}, doi = {10.1007/978-3-030-61056-2_4}, pages = {44 -- 54}, year = {2020}, 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} } @inproceedings{PapazovHege2017, author = {Papazov, Chavdar and Hege, Hans-Christian}, title = {Blue-noise Optimized Point Sets Based on Procrustes Analysis}, booktitle = {SIGGRAPH Asia 2017 Technical Briefs}, doi = {10.1145/3145749.3149442}, pages = {20:1 -- 20:4}, year = {2017}, language = {en} } @article{OeltzeJaffraMeuschkeNeugebaueretal.2019, author = {Oeltze-Jaffra, Steffen and Meuschke, Monique and Neugebauer, Mathias and Saalfeld, Sylvia and Lawonn, Kai and Janiga, Gabor and Hege, Hans-Christian and Zachow, Stefan and Preim, Bernhard}, title = {Generation and Visual Exploration of Medical Flow Data: Survey, Research Trends, and Future Challenges}, volume = {38}, journal = {Computer Graphics Forum}, number = {1}, publisher = {Wiley}, doi = {10.1111/cgf.13394}, pages = {87 -- 125}, year = {2019}, abstract = {Simulations and measurements of blood and air flow inside the human circulatory and respiratory system play an increasingly important role in personalized medicine for prevention, diagnosis, and treatment of diseases. This survey focuses on three main application areas. (1) Computational Fluid Dynamics (CFD) simulations of blood flow in cerebral aneurysms assist in predicting the outcome of this pathologic process and of therapeutic interventions. (2) CFD simulations of nasal airflow allow for investigating the effects of obstructions and deformities and provide therapy decision support. (3) 4D Phase-Contrast (4D PC) Magnetic Resonance Imaging (MRI) of aortic hemodynamics supports the diagnosis of various vascular and valve pathologies as well as their treatment. An investigation of the complex and often dynamic simulation and measurement data requires the coupling of sophisticated visualization, interaction, and data analysis techniques. In this paper, we survey the large body of work that has been conducted within this realm. We extend previous surveys by incorporating nasal airflow, addressing the joint investigation of blood flow and vessel wall properties, and providing a more fine-granular taxonomy of the existing techniques. From the survey, we extract major research trends and identify open problems and future challenges. The survey is intended for researchers interested in medical flow but also more general, in the combined visualization of physiology and anatomy, the extraction of features from flow field data and feature-based visualization, the visual comparison of different simulation results, and the interactive visual analysis of the flow field and derived characteristics.}, language = {en} } @article{KramerNoackBaumetal.2018, 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}, volume = {3}, journal = {Advances in Physics: X}, number = {1}, doi = {10.1080/23746149.2017.1404436}, pages = {1404436}, year = {2018}, 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.2017, 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}, 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}, year = {2017}, 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} } @article{WilliePapPerkaetal.2015, author = {Willie, Bettina M. and Pap, Thomas and Perka, Carsten and Schmidt, Carsten Oliver and Eckstein, Felix and Arampatzis, Adamantios and Hege, Hans-Christian and Madry, Henning and Vortkamp, Andrea and Duda, Georg}, title = {OVERLOAD of joints and its role in osteoarthritis - Towards understanding and preventing progression of primary osteoarthritis}, volume = {76}, journal = {Zeitschrift f{\"u}r Rheumatologie}, number = {Suppl. 1}, doi = {10.1007/s00393-014-1561-2}, pages = {1 -- 4}, year = {2015}, abstract = {Intact joints are necessary for skeletal function and mobility in daily life. A healthy musculoskeletal system is the basis for a functional cardiovascular system as well as an intact immune system. Locomotion, physiotherapy, and various forms of patient activity are essential clinical therapies used in the treatment of neurodegeneration, stroke, diabetes, and cancer. Mobility is substantially impaired with degeneration of joints and, in advanced stages, nighttime pain and sleep disturbance are particularly cumbersome. Osteoarthritis (OA) is also known as degenerative joint disease. OA involves structural and compositional changes in the articular cartilage, as well as in the calcified cartilage, subchondral cortical bone, subchondral cancellous bone, meniscus, joint capsular tissue, and synovium; which eventually lead to degeneration of these tissues comprising synovial joints.}, language = {en} } @article{GuentherKuhnHegeetal.2017, 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}, volume = {2}, journal = {Physical Review Fluids}, doi = {10.1103/PhysRevFluids.2.090502}, pages = {09050-1 -- 09050-3}, year = {2017}, 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. This paper is associated with a poster winner of a 2016 APS/DFD Milton van Dyke Award for work presented at the DFD Gallery of Fluid Motion. The original poster is available from the Gallery of Fluid Motion, https://doi.org/10.1103/APS.DFD.2016.GFM.P0030}, language = {en} }