@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}, series = {Applied Physics A}, 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{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} } @inproceedings{ClasenHege2006, author = {Clasen, Malte and Hege, Hans-Christian}, title = {Terrain rendering using spherical clipmaps}, series = {EuroVis 2006 - Eurographics / IEEE VGTC Symposium on Visualization}, booktitle = {EuroVis 2006 - Eurographics / IEEE VGTC Symposium on Visualization}, pages = {91 -- 98}, year = {2006}, language = {en} } @inproceedings{DercksenProhaskaHege2005, author = {Dercksen, Vincent J. and Prohaska, Steffen and Hege, Hans-Christian}, title = {Fast cross-sectional display of large data sets}, series = {IAPR Conference on Machine Vision Applications}, booktitle = {IAPR Conference on Machine Vision Applications}, address = {Tsukuba, Japan}, pages = {336 -- 339}, year = {2005}, language = {en} } @inproceedings{DercksenWeberGuentheretal.2009, author = {Dercksen, Vincent J. and Weber, Britta and G{\"u}nther, David and Oberlaender, Marcel and Prohaska, Steffen and Hege, Hans-Christian}, title = {Automatic alignment of stacks of filament data}, series = {Proc. IEEE International Symposium on Biomedical Imaging}, booktitle = {Proc. IEEE International Symposium on Biomedical Imaging}, publisher = {IEEE press}, address = {Boston, USA}, pages = {971 -- 974}, year = {2009}, language = {en} } @inproceedings{GoubergritsPoethkePetzetal.2008, author = {Goubergrits, Leonid and P{\"o}thke, Jens and Petz, Christoph and Hege, Hans-Christian and Spuler, Andreas and Kertzscher, Ulrich}, title = {3D Bildgebung von zerebralen Aneurysmen}, series = {Bildverarbeitung f{\"u}r die Medizin}, booktitle = {Bildverarbeitung f{\"u}r die Medizin}, doi = {10.1007/978-3-540-78640-5_31}, pages = {153 -- 157}, year = {2008}, language = {en} } @article{GoubergritsSchallerKertzscheretal.2012, author = {Goubergrits, Leonid and Schaller, Jens and Kertzscher, Ulrich and van den Bruck, Nils and P{\"o}thkow, Kai and Petz, Christoph and Hege, Hans-Christian and Spuler, Andreas}, title = {Statistical wall shear stress maps of ruptured and unruptured middle cerebral artery aneurysms}, series = {J. R. Soc. Interface}, volume = {9}, journal = {J. R. Soc. Interface}, number = {69}, doi = {10.1098/rsif.2011.0490}, pages = {677 -- 688}, year = {2012}, 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{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} }