TY - JOUR A1 - Mahnke, Heinz-Eberhard A1 - Arlt, Tobias A1 - Baum, Daniel A1 - Hege, Hans-Christian A1 - Herter, Felix A1 - Lindow, Norbert A1 - Manke, Ingo A1 - Siopi, Tzulia A1 - Menei, Eve A1 - Etienne, Marc A1 - Lepper, Verena T1 - Virtual unfolding of folded papyri JF - Journal of Cultural Heritage N2 - The historical importance of ancient manuscripts is unique since they provide information about the heritage of ancient cultures. Often texts are hidden in rolled or folded documents. Due to recent impro- vements in sensitivity and resolution, spectacular disclosures of rolled hidden texts were possible by X-ray tomography. However, revealing text on folded manuscripts is even more challenging. Manual unfolding is often too risky in view of the fragile condition of fragments, as it can lead to the total loss of the document. X-ray tomography allows for virtual unfolding and enables non-destructive access to hid- den texts. We have recently demonstrated the procedure and tested unfolding algorithms on a mockup sample. Here, we present results on unfolding ancient papyrus packages from the papyrus collection of the Musée du Louvre, among them objects folded along approximately orthogonal folding lines. In one of the packages, the first identification of a word was achieved, the Coptic word for “Lord”. Y1 - 2020 U6 - https://doi.org/10.1016/j.culher.2019.07.007 VL - 41 SP - 264 EP - 269 PB - Elsevier ER - TY - CHAP A1 - Fröhler, Bernhard A1 - da Cunha Melo, Lucas A1 - Weissenböck, Johannes A1 - Kastner, Johann A1 - Möller, Torsten A1 - Hege, Hans-Christian A1 - Gröller, Eduard M. A1 - Sanctorum, Jonathan A1 - De Beenhouwer, Jan A1 - Sijbers, Jan A1 - Heinzl, Christoph T1 - Tools for the analysis of datasets from X-ray computed tomography based on Talbot-Lau grating interferometry T2 - Proceedings of iCT 2019, (9th Conference on Industrial Computed Tomography, Padova, Italy – iCT 2019, February 13-15, 2019) N2 - This work introduces methods for analyzing the three imaging modalities delivered by Talbot-Lau grating interferometry X-ray computed tomography (TLGI-XCT). The first problem we address is providing a quick way to show a fusion of all three modal- ities. For this purpose the tri-modal transfer function widget is introduced. The widget controls a mixing function that uses the output of the transfer functions of all three modalities, allowing the user to create one customized fused image. A second problem prevalent in processing TLGI-XCT data is a lack of tools for analyzing the segmentation process of such multimodal data. We address this by providing methods for computing three types of uncertainty: From probabilistic segmentation algorithms, from the voxel neighborhoods as well as from a collection of results. We furthermore introduce a linked views interface to explore this data. The techniques are evaluated on a TLGI-XCT scan of a carbon-fiber reinforced dataset with impact damage. We show that the transfer function widget accelerates and facilitates the exploration of this dataset, while the uncertainty analysis methods give insights into how to tweak and improve segmentation algorithms for more suitable results. Y1 - 2019 N1 - PDF | open access: https://www.ndt.net/article/ctc2019/papers/iCT2019_Full_paper_52.pdf IS - paper 52 ER - TY - JOUR A1 - Goubergrits, Leonid A1 - Hellmeier, Florian A1 - Bruening, Jan Joris A1 - Spuler, Andreas A1 - Hege, Hans-Christian A1 - Voss, Samuel A1 - Janiga, Gábor A1 - Saalfeld, Sylvia A1 - Beuing, Oliver A1 - Berg, Philipp T1 - Multiple Aneurysms AnaTomy CHallenge 2018 (MATCH): Uncertainty Quantification of Geometric Rupture Risk Parameters JF - BioMedical Engineering OnLine N2 - Background Geometric parameters have been proposed for prediction of cerebral aneurysm rupture risk. Predicting the rupture risk for incidentally detected unruptured aneurysms could help clinicians in their treatment decision. However, assessment of geometric parameters depends on several factors, including the spatial resolution of the imaging modality used and the chosen reconstruction procedure. The aim of this study was to investigate the uncertainty of a variety of previously proposed geometric parameters for rupture risk assessment, caused by variability of reconstruction procedures. Materials 26 research groups provided segmentations and surface reconstructions of five cerebral aneurysms as part of the Multiple Aneurysms AnaTomy CHallenge (MATCH) 2018. 40 dimensional and non-dimensional geometric parameters, describing aneurysm size, neck size, and irregularity of aneurysm shape, were computed. The medians as well as the absolute and relative uncertainties of the parameters were calculated. Additionally, linear regression analysis was performed on the absolute uncertainties and the median parameter values. Results A large variability of relative uncertainties in the range between 3.9 and 179.8% was found. Linear regression analysis indicates that some parameters capture similar geometric aspects. The lowest uncertainties < 6% were found for the non-dimensional parameters isoperimetric ratio, convexity ratio, and ellipticity index. Uncertainty of 2D and 3D size parameters was significantly higher than uncertainty of 1D parameters. The most extreme uncertainties > 80% were found for some curvature parameters. Conclusions Uncertainty analysis is essential on the road to clinical translation and use of rupture risk prediction models. Uncertainty quantification of geometric rupture risk parameters provided by this study may help support development of future rupture risk prediction models. Y1 - 2019 U6 - https://doi.org/10.1186/s12938-019-0657-y VL - 18 IS - 35 ER - TY - JOUR A1 - Fröhler, Bernhard A1 - Elberfeld, Tim A1 - Möller, Torsten A1 - Hege, Hans-Christian A1 - Weissenböck, Johannes A1 - De Beenhouwer, Jan A1 - Sijbers, Jan A1 - Kastner, Johann A1 - Heinzl, Christoph T1 - A Visual Tool for the Analysis of Algorithms for Tomographic Fiber Reconstruction in Materials Science JF - Computer Graphics Forum N2 - We present visual analysis methods for the evaluation of tomographic fiber reconstruction algorithms by means of analysis, visual debugging and comparison of reconstructed fibers in materials science. The methods are integrated in a tool (FIAKER) that supports the entire workflow. It enables the analysis of various fiber reconstruction algorithms, of differently parameterized fiber reconstruction algorithms and of individual steps in iterative fiber reconstruction algorithms. Insight into the performance of fiber reconstruction algorithms is obtained by a list‐based ranking interface. A 3D view offers interactive visualization techniques to gain deeper insight, e.g., into the aggregated quality of the examined fiber reconstruction algorithms and parameterizations. The tool was designed in close collaboration with researchers who work with fiber‐reinforced polymers on a daily basis and develop algorithms for tomographic reconstruction and characterization of such materials. We evaluate the tool using synthetic datasets as well as tomograms of real materials. Five case studies certify the usefulness of the tool, showing that it significantly accelerates the analysis and provides valuable insights that make it possible to improve the fiber reconstruction algorithms. The main contribution of the paper is the well‐considered combination of methods and their seamless integration into a visual tool that supports the entire workflow. Further findings result from the analysis of (dis‐)similarity measures for fibers as well as from the discussion of design decisions. It is also shown that the generality of the analytical methods allows a wider range of applications, such as the application in pore space analysis. Y1 - 2019 U6 - https://doi.org/10.1111/cgf.13688 VL - 38 IS - 3 SP - 273 EP - 283 ER - TY - JOUR A1 - Udvary, Daniel A1 - Harth, Philipp A1 - Macke, Jakob H. A1 - Hege, Hans-Christian A1 - de Kock, Christiaan P. J. A1 - Sakmann, Bert A1 - Oberlaender, Marcel T1 - A Theory for the Emergence of Neocortical Network Architecture JF - BioRxiv Y1 - 2020 U6 - https://doi.org/https://doi.org/10.1101/2020.11.13.381087 ER - TY - JOUR A1 - Pöthkow, Kai A1 - Petz, Christoph A1 - Hege, Hans-Christian T1 - Approximate Level-Crossing Probabilities for Interactive Visualization of Uncertain Isocontours JF - International Journal for Uncertainty Quantification Y1 - 2013 U6 - https://doi.org/10.1615/Int.J.UncertaintyQuantification.2012003958 VL - 3 IS - 2 SP - 101 EP - 117 ER - TY - GEN A1 - Homberg, Ulrike A1 - Baum, Daniel A1 - Wiebel, Alexander A1 - Prohaska, Steffen A1 - Hege, Hans-Christian ED - Bremer, Peer-Timo ED - Hotz, Ingrid ED - Pascucci, Valerio ED - Peikert, Ronald T1 - Definition, Extraction, and Validation of Pore Structures in Porous Materials BT - Theory, Algorithms, and Applications T2 - Topological Methods in Data Analysis and Visualization III Y1 - 2014 U6 - https://doi.org/10.1007/978-3-319-04099-8_15 SP - 235 EP - 248 PB - Springer ER - TY - CHAP A1 - Klindt, Marco A1 - Prohaska, Steffen A1 - Baum, Daniel A1 - Hege, Hans-Christian ED - Arnold, David ED - Kaminski, Jaime ED - Niccolucci, Franco ED - Stork, Andre T1 - Conveying Archaeological Contexts to Museum Visitors: Case Study Pergamon Exhibition T2 - VAST12: The 13th International Symposium on Virtual Reality, Archaeology and Intelligent Cultural Heritage - Short Papers Y1 - 2012 UR - http://diglib.eg.org/EG/DL/PE/VAST/VAST12S/025-028.pdf U6 - https://doi.org/10.2312/PE/VAST/VAST12S/025-028 SP - 25 EP - 28 PB - Eurographics Association CY - Brighton, UK ER - TY - CHAP A1 - Klindt, Marco A1 - Baum, Daniel A1 - Prohaska, Steffen A1 - Hege, Hans-Christian T1 - iCon.text – a customizable iPad app for kiosk applications in museum exhibitions T2 - EVA 2012 Berlin Y1 - 2012 SP - 150 EP - 155 PB - Gesellschaft zur Förderung angewandter Informatik e.V. CY - Volmerstraße 3, 12489 Berlin ER - TY - CHAP A1 - Wiebel, Alexander A1 - Preis, Philipp A1 - Vos, Frans A1 - Hege, Hans-Christian ED - Hlawitschka, Mario ED - Weinkauf, Tino T1 - 3D Strokes on Visible Structures in Direct Volume Rendering T2 - EuroVis - Short Papers Y1 - 2013 U6 - https://doi.org/10.2312/PE.EuroVisShort.EuroVisShort2013.091-095 SP - 91 EP - 95 PB - Eurographics Association ER - TY - CHAP A1 - Kuhn, Alexander A1 - Lindow, Norbert A1 - Günther, Tobias A1 - Wiebel, Alexander A1 - Theisel, Holger A1 - Hege, Hans-Christian T1 - Trajectory Density Projection for Vector Field Visualization T2 - EuroVis 2013, short papers. M. Hlawitschka, Tino Weinkauf (eds.) Y1 - 2013 UR - http://vc.cs.ovgu.de/files/publications/2013/Kuhn_2013_EUROVIS.pdf U6 - https://doi.org/10.2312/PE.EuroVisShort.EuroVisShort2013.031-035 SP - 31 EP - 35 ER - TY - JOUR A1 - Pöthkow, Kai A1 - Hege, Hans-Christian T1 - Nonparametric Models for Uncertainty Visualization JF - Computer Graphics Forum Y1 - 2013 U6 - https://doi.org/10.1111/cgf.12100 target VL - 32 IS - 3 SP - 131 EP - 140 ER - TY - JOUR A1 - Lindow, Norbert A1 - Baum, Daniel A1 - Bondar, Ana-Nicoleta A1 - Hege, Hans-Christian T1 - Exploring cavity dynamics in biomolecular systems JF - BMC Bioinformatics Y1 - 2013 U6 - https://doi.org/10.1186/1471-2105-14-S19-S5 VL - 14 ET - (Suppl 19):S5 ER - TY - JOUR A1 - Ehlke, Moritz A1 - Ramm, Heiko A1 - Lamecker, Hans A1 - Hege, Hans-Christian A1 - Zachow, Stefan T1 - Fast Generation of Virtual X-ray Images for Reconstruction of 3D Anatomy JF - IEEE Transactions on Visualization and Computer Graphics Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-35928 VL - 19 IS - 12 SP - 2673 EP - 2682 ER - TY - JOUR A1 - Lindow, Norbert A1 - Baum, Daniel A1 - Hege, Hans-Christian T1 - Voronoi-Based Extraction and Visualization of Molecular Paths JF - IEEE Transactions on Visualization and Computer Graphics Y1 - 2011 U6 - https://doi.org/10.1109/TVCG.2011.259 VL - 17 IS - 12 SP - 2025 EP - 2034 ER - TY - JOUR A1 - Rigort, Alexander A1 - Günther, David A1 - Hegerl, Reiner A1 - Baum, Daniel A1 - Weber, Britta A1 - Prohaska, Steffen A1 - Medalia, Ohad A1 - Baumeister, Wolfgang A1 - Hege, Hans-Christian T1 - Automated segmentation of electron tomograms for a quantitative description of actin filament networks JF - Journal of Structural Biology Y1 - 2012 U6 - https://doi.org/10.1016/j.jsb.2011.08.012 VL - 177 SP - 135 EP - 144 ER - TY - JOUR A1 - Petz, Christoph A1 - Oberleithner, Kilian A1 - Sieber, Moritz A1 - Nayeri, Christian A1 - Paschereit, Oliver A1 - Wygnanski, Israel A1 - Noack, Bernd A1 - Hege, Hans-Christian T1 - Global Modes in a Swirling Jet Undergoing Vortex Breakdown JF - Physics of Fluids Y1 - 2011 U6 - https://doi.org/10.1063/1.3640007 VL - 23 SP - 091102 PB - Awarded Visualization; First Prize at 28th Annual Gallery of Fluid Motion exhibit, held at the 63th Annual Meeting of the American Physical Society, Division of Fluid Dynamics (Long Beach, CA, USA, November 21-23, 2010). ER - TY - GEN A1 - Dercksen, Vincent J. A1 - Oberlaender, Marcel A1 - Sakmann, Bert A1 - Hege, Hans-Christian T1 - Light Microscopy-Based Reconstruction and Interactive Structural Analysis of Cortical Neural Networks T2 - BioVis 2011 Abstracts, 1st IEEE Symposium on Biological Data Visualization Y1 - 2011 ER - TY - JOUR A1 - Hege, Hans-Christian A1 - Koppitz, Michael A1 - Marquardt, Falko A1 - McDonald, Chris A1 - Mielack, Christopher T1 - Visual Analysis of Quantum Physics Data JF - Quantum Dynamic Imaging Y1 - 2011 U6 - https://doi.org/10.1007/978-1-4419-9491-2_6 SP - 71 EP - 87 PB - Springer ER - TY - JOUR A1 - Wiebel, Alexander A1 - Vos, Frans A1 - Foerster, David A1 - Hege, Hans-Christian T1 - WYSIWYP: What You See Is What You Pick JF - IEEE Transactions on Visualization and Computer Graphics Y1 - 2012 U6 - https://doi.org/10.1109/TVCG.2012.292 VL - 18 IS - 12 SP - 2236 EP - 2244 ER -