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Institute for Visualization and Interactive Systems
Institute
Team
Thomas Ertl

Thomas Ertl

Prof. Dr. rer. nat. Dr. techn. h. c. Dr.-Ing. E. h.

Professor of Practical Computer Science, Director of the research group Graphic Interactive Systems at the Institute for Visualization and Interactive Systems (VIS), Co-Director of the Visualization Research Center (VISUS), Director of the Stuttgart Center for Simulation Science (SC SimTech), Speaker of the Cluster of Excellence EXC 2075

Contact

+49 711 685 - 88331 (VIS),
+49 711 685-88601 (VISUS),
+4971168588340
Email
Business card (VCF)

VIS: Universitätsstr. 38 (Raum: 1.445), VISUS: Allmandring 19 (Raum: 01.006)
70569 Stuttgart
Deutschland

Office Hours

Whenever the door is open, otherwise by appointment.

Secretaries:

Frau Margot Roubicek (VIS morning): +49 (0)711 685-88456
Frau Andrea Zander (VIS afternoon): +49 (0)711 685-88404
Frau Maria Schulz (VISUS): +49 (0)711 685-88600

Publications

2022
1. Baumann, Martin ; Satkunarajan, Jena ; Koch, Steffen ; Ertl, Thomas: Hierarchical Multifocus Navigation in Text Annotation Data. In: Misue, K. (Hrsg.) ; Misue, K. (Hrsg.): Proc. IEEE Pac. Vis. Symp. (PacificVis), Proc. IEEE Pac. Vis. Symp. (PacificVis), 2022, S. 166--170
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  @inproceedings{Baumann.2022, author = {Baumann, Martin and Satkunarajan, Jena and Koch, Steffen and Ertl, Thomas}, booktitle = {Proc. IEEE Pac. Vis. Symp. (PacificVis)}, doi = {\url{10.1109/PacificVis53943.2022.00026}}, editor = {Misue, Kazao}, pages = {166--170}, title = {{Hierarchical Multifocus Navigation in Text Annotation Data}}, year = 2022 }
2. Bruder, Valentin ; Larsen, Matthew ; Ertl, Thomas ; Childs, Hank ; Frey, Steffen: A Hybrid In Situ Approach for Cost Efficient Image Database Generation. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2022), S. 1–1
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  @article{bruder:2022:hybrid, abstract = {The visualization of results while the simulation is running is increasingly common in extreme scale computing environments. We present a novel approach for in situ generation of image databases to achieve cost savings on supercomputers. Our approach, a hybrid between traditional inline and in transit techniques, dynamically distributes visualization tasks between simulation nodes and visualization nodes, using probing as a basis to estimate rendering cost. Our hybrid design differs from previous works in that it creates opportunities to minimize idle time from four fundamental types of inefficiency: variability, limited scalability, overhead, and rightsizing. We demonstrate our results by comparing our method against both inline and in transit methods for a variety of configurations, including two simulation codes and a scaling study that goes above 19K cores. Our findings show that our approach is superior in many configurations. As in situ visualization becomes increasingly ubiquitous, we believe our technique could lead to significant amounts of reclaimed cycles on supercomputers.}, author = {Bruder, Valentin and Larsen, Matthew and Ertl, Thomas and Childs, Hank and Frey, Steffen}, doi = {10.1109/TVCG.2022.3169590}, journal = {IEEE Transactions on Visualization and Computer Graphics}, pages = {1-1}, title = {A Hybrid In Situ Approach for Cost Efficient Image Database Generation}, url = {https://ieeexplore.ieee.org/abstract/document/9765476}, year = 2022 }
  Link
  https://ieeexplore.ieee.org/abstract/document/9765476
3. Tarner, H. ; Bruder, V. ; Ertl, T. ; Frey, S. ; Beck, F.: Visually Comparing Rendering Performance from Multiple Perspectives. In: Bender, J. ; Botsch, M. ; Keim, D. (Hrsg.) ; Bender, J. ; Botsch, M. ; Keim, D. (Hrsg.): Vision, Modeling, and Visualization, Vision, Modeling, and Visualization : The Eurographics Association, 2022
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  @inproceedings{tarner:2022:visually, abstract = {Evaluation of rendering performance is crucial when selecting or developing algorithms, but challenging as performance can largely differ across a set of selected scenarios. Despite this, performance metrics are often reported and compared in a highly aggregated way. In this paper we suggest a more fine-grained approach for the evaluation of rendering performance, taking into account multiple perspectives on the scenario: camera position and orientation along different paths, rendering algorithms, image resolution, and hardware. The approach comprises a visual analysis system that shows and contrasts the data from these perspectives. The users can explore combinations of perspectives and gain insight into the performance characteristics of several rendering algorithms. A stylized representation of the camera path provides a base layout for arranging the multivariate performance data as radar charts, each comparing the same set of rendering algorithms while linking the performance data with the rendered images. To showcase our approach, we analyze two types of scientific visualization benchmarks.}, author = {Tarner, H. and Bruder, V. and Ertl, T. and Frey, S. and Beck, F.}, booktitle = {Vision, Modeling, and Visualization}, doi = {10.2312/vmv.20221211}, editor = {Bender, Jan and Botsch, Mario and Keim, Daniel}, publisher = {The Eurographics Association}, title = {Visually Comparing Rendering Performance from Multiple Perspectives}, url = {https://doi.org/10.2312/vmv.20221211}, year = 2022 }
  Link
  https://doi.org/10.2312/vmv.20221211
4. Müller, Christoph ; Heinemann, Moritz ; Weiskopf, Daniel ; Ertl, Thomas: Power Overwhelming: Quantifying the Energy Cost of Visualisation. In: Proceedings of the 2022 IEEE Workshop on Evaluation and Beyond - Methodological Approaches for Visualization, Proceedings of the 2022 IEEE Workshop on Evaluation and Beyond - Methodological Approaches for Visualization, 2022, S. 38–46
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  @conference{mueller2022power, author = {Müller, Christoph and Heinemann, Moritz and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the 2022 IEEE Workshop on Evaluation and Beyond - Methodological Approaches for Visualization}, doi = {10.1109/BELIV57783.2022.00009}, pages = {38-46}, title = {Power Overwhelming: Quantifying the Energy Cost of Visualisation}, year = 2022 }
5. Huth, Franziska ; Blascheck, Tanja ; Koch, Steffen ; Ertl, Thomas: Animated Transitions for Small-Scale Visualizations. In: 15th International Symposium on Visual Information Communication and Interaction, 15th International Symposium on Visual Information Communication and Interaction. Chur, Switzerland : Association for Computing Machinery, 2022 — ISBN 9781450398060, S. 8
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  @inproceedings{10.1145/3554944.3554945, abstract = {When visualizations are used to augment text, geographical information on a map, or on mobile devices, there often is not enough space to show complex data with approaches like juxtaposed visualizations or coordinated views. To alleviate this issue, we propose the use of animated transitions between several small-scale visualizations. We discuss design considerations for animated transitions in small-scale visualizations. We further present the results of a study on the effectiveness of those animated transitions in conveying information and attribute relations, and the mental load of following the animated transitions.}, address = {New York, NY, USA}, articleno = {9}, author = {Huth, Franziska and Blascheck, Tanja and Koch, Steffen and Ertl, Thomas}, booktitle = {15th International Symposium on Visual Information Communication and Interaction}, doi = {10.1145/3554944.3554945}, isbn = {9781450398060}, location = {Chur, Switzerland}, numpages = {8}, pages = 8, publisher = {Association for Computing Machinery}, series = {VINCI'22}, title = {Animated Transitions for Small-Scale Visualizations}, url = {https://doi.org/10.1145/3554944.3554945}, year = 2022 }
  Link
  https://doi.org/10.1145/3554944.3554945
6. Knittel, Johannes ; Koch, Steffen ; Tang, Tan ; Chen, Wei ; Wu, Yingcai ; Liu, Shixia ; Ertl, Thomas: Real-Time Visual Analysis of High-Volume Social Media Posts. In: IEEE Transactions on Visualization & Computer Graphics, IEEE Transactions on Visualization & Computer Graphics. Bd. 28. Los Alamitos, CA, USA, IEEE Computer Society (2022), Nr. 01, S. 879–889
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  @article{Knittel22Streaming, address = {Los Alamitos, CA, USA}, author = {Knittel, Johannes and Koch, Steffen and Tang, Tan and Chen, Wei and Wu, Yingcai and Liu, Shixia and Ertl, Thomas}, doi = {10.1109/TVCG.2021.3114800}, issn = {1941-0506}, journal = {IEEE Transactions on Visualization & Computer Graphics}, month = jan, number = 01, pages = {879-889}, publisher = {IEEE Computer Society}, title = {Real-Time Visual Analysis of High-Volume Social Media Posts}, volume = 28, year = 2022 }
7. Becher, Michael ; Herr, Dominik ; Müller, Christoph ; Kurzhals, Kuno ; Reina, Guido ; Wagner, Lena ; Ertl, Thomas ; Weiskopf, Daniel: Situated Visual Analysis and Live Monitoring for Manufacturing. In: IEEE Computer Graphics and Applications, IEEE Computer Graphics and Applications. (2022), S. 1–1
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  @article{9732172, abstract = {Modern machines continuously log status reports over long periods of time, which are valuable data to optimize working routines. Data visualization is a commonly used tool to gain insights into these data, mostly in retrospective, e.g. to determine causal dependencies between faults of different machines. We present an approach to bring such visual analyses to the shop floor to support reacting to faults in real time. This approach combines combines spatio-temporal analyses of time series using a handheld touch device with augmented reality for live monitoring. Important information augments machines directly in their real-world context and detailed logs of current and historical events are displayed on the handheld device. In collaboration with an industry partner, we designed and tested our approach on a live production line to obtain feedback from operators. We compare our approach for monitoring and analysis with existing solutions that are currently deployed.}, author = {Becher, Michael and Herr, Dominik and Müller, Christoph and Kurzhals, Kuno and Reina, Guido and Wagner, Lena and Ertl, Thomas and Weiskopf, Daniel}, doi = {10.1109/MCG.2022.3157961}, issn = {1558-1756}, journal = {IEEE Computer Graphics and Applications}, pages = {1-1}, title = {Situated Visual Analysis and Live Monitoring for Manufacturing}, year = 2022 }
8. Straub, Alexander ; Boblest, Sebastian ; Karch, Grzegorz K. ; Sadlo, Filip ; Ertl, Thomas: Droplet-Local Line Integration for Multiphase Flow. In: 2022 IEEE Visualization and Visual Analytics (VIS), 2022 IEEE Visualization and Visual Analytics (VIS), 2022 — ISBN 978-1-6654-8812-9, S. 135–139
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  @inproceedings{straub2022dropletlocal, abstract = {Line integration of stream-, streak-, and pathlines is widely used and popular for visualizing single-phase flow. In multiphase flow, i.e., where the fluid consists, e.g., of a liquid and a gaseous phase, these techniques could also provide valuable insights into the internal flow of droplets and ligaments and thus into their dynamics. However, since such structures tend to act as entities, high translational and rotational velocities often obfuscate their detail. As a remedy, we present a method for deriving a droplet-local velocity field, using a decomposition of the original velocity field removing translational and rotational velocity parts, and adapt path- and streaklines. Generally, the resulting integral lines are thus shorter and less tangled, which simplifies their analysis. We demonstrate and discuss the utility of our approach on droplets in two-phase flow data and visualize the removed velocity parts employing glyphs for context.}, author = {Straub, Alexander and Boblest, Sebastian and Karch, Grzegorz K. and Sadlo, Filip and Ertl, Thomas}, booktitle = {2022 IEEE Visualization and Visual Analytics (VIS)}, doi = {10.1109/VIS54862.2022.00036}, isbn = {978-1-6654-8812-9}, pages = {135-139}, preprinturl = {https://arxiv.org/abs/2208.11475}, title = {Droplet-Local Line Integration for Multiphase Flow}, url = {https://doi.org/10.1109/VIS54862.2022.00036}, year = 2022 }
  Link
  https://doi.org/10.1109/VIS54862.2022.00036
9. Frey, Steffen ; Bruder, Valentin ; Frieß, Florian ; Gralka, Patrick ; Rau, Tobias ; Ertl, Thomas ; Reina, Guido: Parameter Adaptation In Situ: Design Impacts and Trade-Offs. In: Childs, H. ; Bennett, J. C. ; Garth, C. (Hrsg.) ; Childs, H. ; Bennett, J. C. ; Garth, C. (Hrsg.): In Situ Visualization for Computational Science, In Situ Visualization for Computational Science. Cham : Springer International Publishing, 2022 — ISBN 978-3-030-81627-8, S. 159--182
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  @inproceedings{frey2022parameter, address = {Cham}, author = {Frey, Steffen and Bruder, Valentin and Frie{\ss}, Florian and Gralka, Patrick and Rau, Tobias and Ertl, Thomas and Reina, Guido}, booktitle = {In Situ Visualization for Computational Science}, doi = {10.1007/978-3-030-81627-8_8}, editor = {Childs, Hank and Bennett, Janine C. and Garth, Christoph}, isbn = {978-3-030-81627-8}, pages = {159--182}, publisher = {Springer International Publishing}, title = {Parameter Adaptation In Situ: Design Impacts and Trade-Offs}, year = 2022 }
2021
1. Frieß, Florian ; Becher, Michael ; Reina, Guido ; Ertl, Thomas: Amortised Encoding for Large High-Resolution Displays. In: 2021 IEEE 11th Symposium on Large Data Analysis and Visualization (LDAV), 2021 IEEE 11th Symposium on Large Data Analysis and Visualization (LDAV), 2021, S. 53–62
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  @inproceedings{9623235, abstract = {Both visual detail and a low-latency transfer of image data are required for collaborative exploration of scientific data sets across large high-resolution displays. In this work, we present an approach that reduces the resolution before the encoding and uses temporal upscaling to reconstruct the full resolution image, reducing the overall latency and the required bandwidth without significantly impacting the details perceived by observers. Our approach takes advantage of the fact that humans do not perceive the full details of moving objects by providing a perfect reconstruction for static parts of the image, while non-static parts are reconstructed with a lower quality. This strategy enables a substantial reduction of the encoding latency and the required bandwidth with barely noticeable changes in visual quality, which is crucial for collaborative analysis across display walls at different locations. Additionally, our approach can be combined with other techniques aiming to reduce the required bandwidth while keeping the quality as high as possible, such as foveated encoding. We demonstrate the reduced overall latency, the required bandwidth, as well as the high image quality using different visualisations.}, author = {Frieß, Florian and Becher, Michael and Reina, Guido and Ertl, Thomas}, booktitle = {2021 IEEE 11th Symposium on Large Data Analysis and Visualization (LDAV)}, doi = {10.1109/LDAV53230.2021.00013}, pages = {53-62}, title = {Amortised Encoding for Large High-Resolution Displays}, url = {https://ieeexplore.ieee.org/document/9623235}, year = 2021 }
  Link
  https://ieeexplore.ieee.org/document/9623235
2. Tkachev, Gleb ; Frey, Steffen ; Ertl, Thomas: S4: Self-Supervised learning of Spatiotemporal Similarity. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2021) — ISBN 10.1109/TVCG.2021.3101418
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  @article{tkachev2021selfsupervised, abstract = {We introduce an ML-driven approach that enables interactive example-based queries for similar behavior in ensembles of spatiotemporal scientific data. This addresses an important use case in the visual exploration of simulation and experimental data, where data is often large, unlabeled and has no meaningful similarity measures available. We exploit the fact that nearby locations often exhibit similar behavior and train a Siamese Neural Network in a self-supervised fashion, learning an expressive latent space for spatiotemporal behavior. This space can be used to find similar behavior with just a few user-provided examples. We evaluate this approach on several ensemble datasets and compare with multiple existing methods, showing both qualitative and quantitative results.}, author = {Tkachev, Gleb and Frey, Steffen and Ertl, Thomas}, isbn = {10.1109/TVCG.2021.3101418}, journal = {IEEE Transactions on Visualization and Computer Graphics}, title = {S4: Self-Supervised learning of Spatiotemporal Similarity}, year = 2021 }
3. Schatz, Karsten ; Franco Moreno, Juan José ; Schäfer, Marco ; Rose, Alexander S. ; Ferrario, Valerio ; Pleiss, Jürgen ; Vázquez, Pere-Pau ; Ertl, Thomas ; u. a.: Visual Analysis of Large-Scale Protein-Ligand Interaction Data. In: Computer Graphics Forum, Computer Graphics Forum. Bd. 40 (2021), Nr. 6, S. 394–408
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  @article{schatz2021visual, abstract = {When studying protein-ligand interactions, many different factors can influence the behaviour of the protein as well as the ligands. Molecular visualisation tools typically concentrate on the movement of single ligand molecules; however, viewing only one molecule can merely provide a hint of the overall behaviour of the system. To tackle this issue, we do not focus on the visualisation of the local actions of individual ligand molecules but on the influence of a protein and their overall movement. Since the simulations required to study these problems can have millions of time steps, our presented system decouples visualisation and data preprocessing: our preprocessing pipeline aggregates the movement of ligand molecules relative to a receptor protein. For data analysis, we present a web-based visualisation application that combines multiple linked 2D and 3D views that display the previously calculated data The central view, a novel enhanced sequence diagram that shows the calculated values, is linked to a traditional surface visualisation of the protein. This results in an interactive visualisation that is independent of the size of the underlying data, since the memory footprint of the aggregated data for visualisation is constant and very low, even if the raw input consisted of several terabytes.}, author = {Schatz, Karsten and Franco Moreno, Juan José and Schäfer, Marco and Rose, Alexander S. and Ferrario, Valerio and Pleiss, Jürgen and Vázquez, Pere-Pau and Ertl, Thomas and Krone, Michael}, doi = {10.1111/cgf.14386}, journal = {Computer Graphics Forum}, number = 6, pages = {394-408}, title = {Visual Analysis of Large-Scale Protein-Ligand Interaction Data}, url = {https://onlinelibrary.wiley.com/doi/10.1111/cgf.14386}, volume = 40, year = 2021 }
  Link
  https://onlinelibrary.wiley.com/doi/10.1111/cgf.14386
4. Schatz, K. ; Müller, C. ; Gralka, P. ; Heinemann, M. ; Straub, A. ; Schulz, C. ; Braun, M. ; Rau, T. ; u. a.: 2019 IEEE Scientific Visualization Contest Winner: Visual Analysis of Structure Formation in Cosmic Evolution. In: IEEE Computer Graphics and Applications (CG&A), IEEE Computer Graphics and Applications (CG&A). Bd. 41 (2021), Nr. 06, S. 101–110
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  @article{9126163, abstract = {Simulations of cosmic evolution are a means to explain the formation of the universe as we see it today. The resulting data of such simulations comprise numerous physical quantities, which turns their analysis into a complex task. Here, we analyze such high-dimensional and time-varying particle data using various visualization techniques from the fields of particle visualization, flow visualization, volume visualization, and information visualization. Our approach employs specialized filters to extract and highlight the development of so-called active galactic nuclei and filament structures formed by the particles. Additionally, we calculate X-ray emission of the evolving structures in a pre-processing step to complement visual analysis. Our approach is integrated into a single visual analytics framework to allow for analysis of star formation at interactive frame rates. Finally, we lay out the methodological aspects of our work that led to success at the 2019 IEEE SciVis Contest.}, author = {Schatz, K. and Müller, C. and Gralka, P. and Heinemann, M. and Straub, A. and Schulz, C. and Braun, M. and Rau, T. and Becher, M. and Frey, S. and Reina, G. and Sedlmair, M. and Weiskopf, D. and Ertl, T. and Diehl, P. and Marcello, D. and Frank, J. and Müller, T.}, doi = {10.1109/MCG.2020.3004613}, issn = {1558-1756}, journal = {IEEE Computer Graphics and Applications (CG&A)}, month = nov, number = 06, pages = {101-110}, title = {2019 IEEE Scientific Visualization Contest Winner: Visual Analysis of Structure Formation in Cosmic Evolution}, url = {https://ieeexplore.ieee.org/document/9126163}, volume = 41, year = 2021 }
  Link
  https://ieeexplore.ieee.org/document/9126163
5. Heinemann, Moritz ; Frey, Steffen ; Tkachev, Gleb ; Straub, Alexander ; Sadlo, Filip ; Ertl, Thomas: Visual analysis of droplet dynamics in large-scale multiphase spray simulations. In: Journal of Visualization, Journal of Visualization. Bd. 24 (2021), Nr. 5, S. 943--961
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  @article{heinemann2021visual, abstract = {We present a data-driven visual analysis approach for the in-depth exploration of large numbers of droplets. Understanding droplet dynamics in sprays is of interest across many scientific fields for both simulation scientists and engineers. In this paper, we analyze large-scale direct numerical simulation datasets of the two-phase flow of non-Newtonian jets. Our interactive visual analysis approach comprises various dedicated exploration modalities that are supplemented by directly linking to ParaView. This hybrid setup supports a detailed investigation of droplets, both in the spatial domain and in terms of physical quantities . Considering a large variety of extracted physical quantities for each droplet enables investigating different aspects of interest in our data. To get an overview of different types of characteristic behaviors, we cluster massive numbers of droplets to analyze different types of occurring behaviors via domain-specific pre-aggregation, as well as different methods and parameters. Extraordinary temporal patterns are of high interest, especially to investigate edge cases and detect potential simulation issues. For this, we use a neural network-based approach to predict the development of these physical quantities and identify irregularly advected droplets.}, author = {Heinemann, Moritz and Frey, Steffen and Tkachev, Gleb and Straub, Alexander and Sadlo, Filip and Ertl, Thomas}, day = 04, doi = {10.1007/s12650-021-00750-6}, issn = {1875-8975}, journal = {Journal of Visualization}, month = may, number = 5, pages = {943--961}, title = {Visual analysis of droplet dynamics in large-scale multiphase spray simulations}, url = {https://doi.org/10.1007/s12650-021-00750-6}, volume = 24, year = 2021 }
  Link
  https://doi.org/10.1007/s12650-021-00750-6
6. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: ELSKE: Efficient Large-Scale Keyphrase Extraction. In: arXiv preprint arXiv:2102.05700, arXiv preprint arXiv:2102.05700. (2021)
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  @article{knittel2021elske, archiveprefix = {arXiv}, author = {Knittel, Johannes and Koch, Steffen and Ertl, Thomas}, eprint = {2102.05700}, journal = {arXiv preprint arXiv:2102.05700}, primaryclass = {cs.IR}, title = {ELSKE: Efficient Large-Scale Keyphrase Extraction}, year = 2021 }
7. Schatz, Karsten ; Frieß, Florian ; Schäfer, Marco ; Buchholz, Patrick C. F. ; Pleiss, Jürgen ; Ertl, Thomas ; Krone, Michael: Analyzing the similarity of protein domains by clustering Molecular Surface Maps. In: Computers & Graphics, Computers & Graphics. Bd. 99 (2021), S. 114–127
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  @article{schatz2021analyzing, abstract = {Many biochemical and biomedical applications such as protein engineering or drug design are concerned with finding functionally similar proteins, however, this remains to be a challenging task. We present a new image-based approach for identifying and visually comparing proteins with similar function that builds on the hierarchical clustering of Molecular Surface Maps. Such maps are two-dimensional representations of complex molecular surfaces and can be used to visualize the topology and different physico-chemical properties of proteins. Our method is based on the idea that visually similar maps also imply a similarity in the function of the mapped proteins. To determine map similarity, we compute descriptive feature vectors using image moments, color moments, or a Convolutional Neural Network and use them for a hierarchical clustering of the maps. We demonstrate the feasibility of our approach using two data sets: an ensemble of hand-selected proteins with known similarities used for verification and an ensemble of ketolase enzymes, where we analyzed the individual domains using our method. Our method is integrated in an interactive visualization application, which allows users to explore and analyze the results. It visualizes the hierarchical clustering and offers linked views that provide details for a comparative data analysis.}, author = {Schatz, Karsten and Frieß, Florian and Schäfer, Marco and Buchholz, Patrick C. F. and Pleiss, Jürgen and Ertl, Thomas and Krone, Michael}, doi = {10.1016/j.cag.2021.06.007}, journal = {Computers & Graphics}, pages = {114-127}, title = {Analyzing the similarity of protein domains by clustering Molecular Surface Maps}, url = {https://www.sciencedirect.com/science/article/abs/pii/S0097849321001229}, volume = 99, year = 2021 }
  Link
  https://www.sciencedirect.com/science/article/abs/pii/S0097849321001229
8. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: Efficient Sparse Spherical K-Means for Document Clustering. In: Proceedings of the 21st ACM Symposium on Document Engineering, Proceedings of the 21st ACM Symposium on Document Engineering. Limerick, Ireland : Association for Computing Machinery, 2021 — ISBN 9781450385961
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  @inproceedings{Knittel21Clustering, abstract = {Spherical k-Means is frequently used to cluster document collections because it performs reasonably well in many settings and is computationally efficient. However, the time complexity increases linearly with the number of clusters k, which limits the suitability of the algorithm for larger values of k depending on the size of the collection. Optimizations targeted at the Euclidean k-Means algorithm largely do not apply because the cosine distance is not a metric. We therefore propose an efficient indexing structure to improve the scalability of Spherical k-Means with respect to k. Our approach exploits the sparsity of the input vectors and the convergence behavior of k-Means to reduce the number of comparisons on each iteration significantly.}, address = {New York, NY, USA}, articleno = {6}, author = {Knittel, Johannes and Koch, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the 21st ACM Symposium on Document Engineering}, doi = {10.1145/3469096.3474937}, isbn = {9781450385961}, location = {Limerick, Ireland}, numpages = {4}, publisher = {Association for Computing Machinery}, series = {DocEng '21}, title = {Efficient Sparse Spherical K-Means for Document Clustering}, url = {https://doi.org/10.1145/3469096.3474937}, year = 2021 }
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  https://doi.org/10.1145/3469096.3474937
9. Huth, Franziska ; Blascheck, Tanja ; Koch, Steffen ; Utz, Sonja ; Ertl, Thomas: Word-sized Visualizations for Exploring Discussion Diversity in Social Media. In: Proceedings of the 16th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, Proceedings of the 16th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications. Bd. 3 IVAPP : SciTePress, 2021 — ISBN 978-989-758-488-6, S. 256–265
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  @conference{ivapp21, abstract = {In this paper, we explore the design space of word-sized visualizations—small graphics, usually the same size as a word, that visualize data in or related to a text—for displaying and exploring categories in social media feeds such as Twitter streams. Social media contributions are typically microposts, which allow us to attach word-sized visualizations to show category assignment, diversity, or development. We consider and combine word-sized visualizations made up of basic marks and visual variables, existing word-sized visualization concepts, as well as large text visualizations. In an application example we show how word-sized visualizations can evince context changes within a discussion on Twitter and reveal topic diversity.}, author = {Huth, Franziska and Blascheck, Tanja and Koch, Steffen and Utz, Sonja and Ertl, Thomas}, booktitle = {Proceedings of the 16th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications}, doi = {10.5220/0010328602560265}, eventdate = {2021}, isbn = {978-989-758-488-6}, language = {english}, organization = {INSTICC}, pages = {256-265}, publisher = {SciTePress}, title = {Word-sized Visualizations for Exploring Discussion Diversity in Social Media}, volume = {3 IVAPP}, year = 2021 }
10. Knabben, Moritz ; Baumann, Martin ; Blascheck, Tanja ; Ertl, Thomas ; Koch, Steffen: Visualizing Temporal-Thematic Patterns in Text Collections. In: Andres, B. ; Campen, M. ; Sedlmair, M. (Hrsg.) ; Andres, B. ; Campen, M. ; Sedlmair, M. (Hrsg.): Vision, Modeling, and Visualization, Vision, Modeling, and Visualization : The Eurographics Association, 2021 — ISBN 978-3-03868-161-8, S. 9–16
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  @inproceedings{10.2312:vmv.20211366, author = {Knabben, Moritz and Baumann, Martin and Blascheck, Tanja and Ertl, Thomas and Koch, Steffen}, booktitle = {Vision, Modeling, and Visualization}, doi = {10.2312/vmv.20211366}, editor = {Andres, Bjoern and Campen, Marcel and Sedlmair, Michael}, isbn = {978-3-03868-161-8}, pages = {9-16}, publisher = {The Eurographics Association}, title = {Visualizing Temporal-Thematic Patterns in Text Collections}, year = 2021 }
11. Straub, Alexander ; Karch, Grzegorz K. ; Sadlo, Filip ; Ertl, Thomas: Implicit Visualization of 2D Vector Field Topology for Periodic Orbit Detection. In: Hotz, I. ; Bin Masood, T. ; Sadlo, F. ; Tierny, J. (Hrsg.) ; Hotz, I. ; Bin Masood, T. ; Sadlo, F. ; Tierny, J. (Hrsg.): Topological Methods in Data Analysis and Visualization VI, Topological Methods in Data Analysis and Visualization VI : Springer International Publishing, 2021 — ISBN 978-3-030-83500-2, S. 159–180
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  @incollection{straub2021implicit, abstract = {We present implicit visualization of 2D vector field topology, and show its utility for validating and guiding approaches for periodic orbit extraction. Instead of following the traditional approach by explicit extraction of the topological skeleton, we investigate its implicit visualization by approaches that label the regions that are separated by the skeleton. While such approaches perform well for gradient fields, they fail, in particular, to visualize periodic orbits. This motivates us to complement the label-based approach with a closely related distance-based metric. We show that our approach is able to reveal periodic orbits, also in configurations in which the state-of-the-art techniques for periodic orbit extraction fail, and demonstrate their utility for interactive extraction of all periodic orbits of a 2D vector field.}, author = {Straub, Alexander and Karch, Grzegorz K. and Sadlo, Filip and Ertl, Thomas}, booktitle = {Topological Methods in Data Analysis and Visualization VI}, doi = {10.1007/978-3-030-83500-2_9}, editor = {Hotz, Ingrid and Bin Masood, Talha and Sadlo, Filip and Tierny, Julien}, isbn = {978-3-030-83500-2}, pages = {159-180}, publisher = {Springer International Publishing}, series = {Mathematics and Visualization}, title = {Implicit Visualization of 2D Vector Field Topology for Periodic Orbit Detection}, url = {https://doi.org/10.1007/978-3-030-83500-2_9}, year = 2021 }
  Link
  https://doi.org/10.1007/978-3-030-83500-2_9
12. Knittel, Johannes ; Lalama, Andres ; Koch, Steffen ; Ertl, Thomas: Visual Neural Decomposition to Explain Multivariate Data Sets. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 27 (2021), Nr. 2, S. 1374–1384
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  @article{9222060, author = {{Knittel}, Johannes and {Lalama}, Andres and {Koch}, Steffen and {Ertl}, Thomas}, doi = {10.1109/TVCG.2020.3030420}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = 2, pages = {1374-1384}, title = {Visual Neural Decomposition to Explain Multivariate Data Sets}, volume = 27, year = 2021 }
2020
1. Baumann, Martin ; Koch, Steffen ; John, Markus ; Ertl, Thomas: Interactive Visualization for Reflected Text Analytics. In: Reiter, N. ; Pichler, A. ; Kuhn, J. (Hrsg.) ; Reiter, N. ; Pichler, A. ; Kuhn, J. (Hrsg.): Reflektierte Algorithmische Textanalyse, Reflektierte Algorithmische Textanalyse. Berlin : de Gruyter, 2020 — ISBN 9783110693973, S. 269--296
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  @incollection{Baumann.2020c, address = {Berlin}, author = {Baumann, Martin and Koch, Steffen and John, Markus and Ertl, Thomas}, booktitle = {{Reflektierte Algorithmische Textanalyse}}, doi = {10.1515/9783110693973-012}, editor = {Reiter, Nils and Pichler, Axel and Kuhn, Jonas}, isbn = {9783110693973}, pages = {269--296}, publisher = {{de Gruyter}}, title = {{Interactive Visualization for Reflected Text Analytics}}, year = 2020 }
2. Baumann, Martin ; Minasyan, Harutyun ; Koch, Steffen ; Kurzhals, Kuno ; Ertl, Thomas: AnnoXplorer: A Scalable, Integrated Approach for the Visual Analysis of Text Annotations. In: Proc. 15th Int. Jt. Conf. Comput. Vis., Imaging and Comput. Graph. Theory and App. - IVAPP, Proc. 15th Int. Jt. Conf. Comput. Vis., Imaging and Comput. Graph. Theory and App. - IVAPP, 2020, S. 62--75
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  @inproceedings{Baumann.2020, author = {Baumann, Martin and Minasyan, Harutyun and Koch, Steffen and Kurzhals, Kuno and Ertl, Thomas}, booktitle = {Proc. 15th Int. Jt. Conf. Comput. Vis., Imaging and Comput. Graph. Theory and App. - IVAPP}, pages = {62--75}, title = {{AnnoXplorer: A Scalable, Integrated Approach for the Visual Analysis of Text Annotations}}, year = 2020 }
3. Bruder, Valentin ; Müller, Christoph ; Frey, Steffen ; Ertl, Thomas: On Evaluating Runtime Performance of Interactive Visualizations. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 26 (2020), S. 2848–2862
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  @article{vtoappearevaluating, abstract = {As our field matures, evaluation of visualization techniques has extended from reporting runtime performance to studying user behavior. Consequently, many methodologies and best practices for user studies have evolved. While maintaining interactivity continues to be crucial for the exploration of large data sets, no similar methodological foundation for evaluating runtime performance has been developed. Our analysis of 50 recent visualization papers on new or improved techniques for rendering volumes or particles indicates that only a very limited set of parameters like different data sets, camera paths, viewport sizes, and GPUs are investigated, which make comparison with other techniques or generalization to other parameter ranges at least questionable. To derive a deeper understanding of qualitative runtime behavior and quantitative parameter dependencies, we developed a framework for the most exhaustive performance evaluation of volume and particle visualization techniques that we are aware of, including millions of measurements on ten different GPUs. This paper reports on our insights from statistical analysis of this data discussing independent and linear parameter behavior and non-obvious effects. We give recommendations for best practices when evaluating runtime performance of scientific visualization applications, which can serve as a starting point for more elaborate models of performance quantification.}, author = {Bruder, Valentin and Müller, Christoph and Frey, Steffen and Ertl, Thomas}, doi = {10.1109/TVCG.2019.2898435}, journal = {IEEE Transactions on Visualization and Computer Graphics}, month = {September}, pages = {2848-2862}, title = {On Evaluating Runtime Performance of Interactive Visualizations}, url = {https://ieeexplore.ieee.org/document/8637795}, volume = 26, year = 2020 }
  Link
  https://ieeexplore.ieee.org/document/8637795
4. Straub, Alexander ; Ertl, Thomas: Visualization Techniques for Droplet Interfaces and Multiphase Flow. In: Lamanna, G. ; Tonini, S. ; Cossali, G. E. ; Weigand, B. (Hrsg.) ; Lamanna, G. ; Tonini, S. ; Cossali, G. E. ; Weigand, B. (Hrsg.): Droplet Interactions and Spray Processes, Droplet Interactions and Spray Processes. Bd. 121 : Springer International Publishing, 2020 — ISBN 978-3-030-33338-6, S. 203–214
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  @incollection{Straub2020dropit, abstract = {The analysis of large multiphase flow simulation data poses an interesting and complex research question, which can be addressed with interactive visualization techniques, as well as semi-automated analysis processes. In this project, the focus lies on the investigation of forces governing droplet evolution. Therefore, our proposed methods visualize and allow the analysis of droplet deformation and breakup, droplet behavior and evolution, and droplet-internal flow. By deriving quantities for interface stretching and bending, we visualize and analyze the influence of surface tension force on breakup dynamics, and forces induced by Marangoni convection. Using machine learning to train a simple model for the prediction of physical droplet properties, we provide a visual analysis framework that can be used to analyze large simulation data. Computing droplet-local velocity fields where every droplet is observed separately in its own frame of reference, we create local, interpretable visualizations of flow within droplets, allowing for the investigation of the influence of flow dynamics on droplet evolution.}, author = {Straub, Alexander and Ertl, Thomas}, booktitle = {Droplet Interactions and Spray Processes}, doi = {10.1007/978-3-030-33338-6_16}, editor = {Lamanna, Grazia and Tonini, Simona and Cossali, Gianpietro Elvio and Weigand, Bernhard}, isbn = {978-3-030-33338-6}, pages = {203-214}, publisher = {Springer International Publishing}, series = {Fluid Mechanics and its Applications}, title = {Visualization Techniques for Droplet Interfaces and Multiphase Flow}, url = {https://dx.doi.org/10.1007/978-3-030-33338-6_16}, volume = 121, year = 2020 }
  Link
  https://dx.doi.org/10.1007/978-3-030-33338-6_16
5. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: PyramidTags: Context-, Time- and Word Order-Aware Tag Maps to Explore Large Document Collections. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2020)
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  @article{9143452, author = {{Knittel}, Johannes and {Koch}, Steffen and {Ertl}, Thomas}, doi = {10.1109/TVCG.2020.3010095}, journal = {IEEE Transactions on Visualization and Computer Graphics}, title = {PyramidTags: Context-, Time- and Word Order-Aware Tag Maps to Explore Large Document Collections}, url = {https://doi.org/10.1109/TVCG.2020.3010095}, year = 2020 }
  Link
  https://doi.org/10.1109/TVCG.2020.3010095
6. Schatz, Karsten ; Frieß, Florian ; Schäfer, Marco ; Ertl, Thomas ; Krone, Michael: Analyzing Protein Similarity by Clustering Molecular Surface Maps. In: Eurographics Workshop on Visual Computing for Biology and Medicine, Eurographics Workshop on Visual Computing for Biology and Medicine, 2020, S. 103–114
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  @inproceedings{schatz2020analyzing, author = {Schatz, Karsten and Frieß, Florian and Schäfer, Marco and Ertl, Thomas and Krone, Michael}, booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine}, doi = {10.2312/vcbm.20201177}, pages = {103-114}, title = {Analyzing Protein Similarity by Clustering Molecular Surface Maps}, year = 2020 }
7. Gralka, P. ; Wald, I. ; Geringer, S. ; Reina, G. ; Ertl, T.: Spatial Partitioning Strategies for Memory-Efficient Ray Tracing of Particles. In: 2020 IEEE 10th Symposium on Large Data Analysis and Visualization (LDAV), 2020 IEEE 10th Symposium on Large Data Analysis and Visualization (LDAV), 2020, S. 42–52
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  @inproceedings{gralka2020spatial, author = {{Gralka}, P. and {Wald}, I. and {Geringer}, S. and {Reina}, G. and {Ertl}, T.}, booktitle = {2020 IEEE 10th Symposium on Large Data Analysis and Visualization (LDAV)}, doi = {10.1109/LDAV51489.2020.00012}, pages = {42-52}, title = {Spatial Partitioning Strategies for Memory-Efficient Ray Tracing of Particles}, year = 2020 }
8. Pathmanathan, Nelusa ; Becher, Michael ; Rodrigues, Nils ; Reina, Guido ; Ertl, Thomas ; Weiskopf, Daniel ; Sedlmair, Michael: Eye vs. Head: Comparing Gaze Methods for Interaction in Augmented Reality. In: Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA), Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA). Stuttgart, Germany : ACM, 2020 — ISBN 9781450371346, S. 50:1-50:5
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  @inproceedings{10.1145/3379156.3391829, abstract = {Visualization in virtual 3D environments can provide a natural way for users to explore data. Often, arm and short head movements are required for interaction in augmented reality, which can be tiring and strenuous though. In an effort toward more user-friendly interaction, we developed a prototype that allows users to manipulate virtual objects using a combination of eye gaze and an external clicker device. Using this prototype, we performed a user study comparing four different input methods of which head gaze plus clicker was preferred by most participants.}, articleno = {50}, author = {Pathmanathan, Nelusa and Becher, Michael and Rodrigues, Nils and Reina, Guido and Ertl, Thomas and Weiskopf, Daniel and Sedlmair, Michael}, booktitle = {Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA)}, doi = {10.1145/3379156.3391829}, isbn = {9781450371346}, location = {Stuttgart, Germany}, numpages = {5}, pages = {50:1-50:5}, publisher = {ACM}, title = {Eye vs. Head: Comparing Gaze Methods for Interaction in Augmented Reality}, url = {https://doi.org/10.1145/3379156.3391829}, year = 2020 }
  Link
  https://doi.org/10.1145/3379156.3391829
9. Frieß, Florian ; Müller, Christoph ; Ertl, Thomas: Real-Time High-Resolution Visualisation. In: Krüger, J. ; Niessner, M. ; Stückler, J. (Hrsg.) ; Krüger, J. ; Niessner, M. ; Stückler, J. (Hrsg.): Proceedings of the Eurographics Symposium on Vision, Modeling, and Visualization (VMV), Proceedings of the Eurographics Symposium on Vision, Modeling, and Visualization (VMV) : The Eurographics Association, 2020 — ISBN 978-3-03868-123-6, S. 127–135
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  @inproceedings{v.20201195, abstract = {While visualisation often strives for abstraction, the interactive exploration of large scientific data sets like densely sampled 3Dfields or massive particle data sets still benefits from rendering their graphical representation in large detail on high-resolutiondisplays such as Powerwalls or tiled display walls driven by multiple GPUs or even GPU clusters. Such visualisation systemsare typically rather unique in their setup of hardware and software which makes transferring a visualisation application fromone high-resolution system to another one a complicated task. As more and more such visualisation systems get installed,collaboration becomes desirable in the sense of sharing such a visualisation running on one site in real time with another high-resolution display on a remote site while at the same time communicating via video and audio. Since typical video conferencesolutions or web-based collaboration tools often cannot deal with resolutions exceeding 4K, with stereo displays or with multi-GPU setups, we designed and implemented a new system based on state-of-the-art hardware and software technologies totransmit high-resolution visualisations including video and audio streams via the internet to remote large displays and back.Our system architecture is built on efficient capturing, encoding and transmission of pixel streams and thus supports a multitudeof configurations combining audio and video streams in a generic approac}, author = {Frieß, Florian and Müller, Christoph and Ertl, Thomas}, booktitle = {Proceedings of the Eurographics Symposium on Vision, Modeling, and Visualization (VMV)}, doi = {10.2312/vmv.20201195}, editor = {Krüger, Jens and Niessner, Matthias and Stückler, Jörg}, isbn = {978-3-03868-123-6}, pages = {127-135}, publisher = {The Eurographics Association}, title = {Real-Time High-Resolution Visualisation}, url = {https://doi.org/10.2312/vmv.20201195 }, year = 2020 }
  Link
  https://doi.org/10.2312/vmv.20201195
10. Frieß, F. ; Braun, M. ; Bruder, V. ; Frey, S. ; Reina, G. ; Ertl, T.: Foveated Encoding for Large High-Resolution Displays. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2020), S. 1–10
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  @article{9224182, abstract = {Collaborative exploration of scientific data sets across large high-resolution displays requires both high visual detail as wellas low-latency transfer of image data (oftentimes inducing the need to trade one for the other). In this work, we present a system thatdynamically adapts the encoding quality in such systems in a way that reduces the required bandwidth without impacting the detailsperceived by one or more observers. Humans perceive sharp, colourful details, in the small foveal region around the centre of the fieldof view, while information in the periphery is perceived blurred and colourless. We account for this by tracking the gaze of observers,and respectively adapting the quality parameter of each macroblock used by the H.264 encoder, considering the so-called visual acuityfall-off. This allows to substantially reduce the required bandwidth with barely noticeable changes in visual quality, which is crucial forcollaborative analysis across display walls at different locations. We demonstrate the reduced overall required bandwidth and the highquality inside the foveated regions using particle rendering and parallel coordinate}, author = {Frieß, F. and Braun, M. and Bruder, V. and Frey, S. and Reina, G. and Ertl, T.}, doi = {10.1109/TVCG.2020.3030445}, journal = {IEEE Transactions on Visualization and Computer Graphics}, pages = {1-10}, title = {Foveated Encoding for Large High-Resolution Displays}, url = {https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9224182}, year = 2020 }
  Link
  https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9224182
11. Öney, Seyda ; Rodrigues, Nils ; Becher, Michael ; Reina, Guido ; Ertl, Thomas ; Sedlmair, Michael ; Weiskopf, Daniel: Evaluation of Gaze Depth Estimation from Eye Tracking in Augmented Reality. In: Proceedings of the Symposium on Eye Tracking Research & Applications-Short Paper (ETRA-SP), Proceedings of the Symposium on Eye Tracking Research & Applications-Short Paper (ETRA-SP) : ACM, 2020, S. 49:1-49:5
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  @inproceedings{oney_evaluation_2020, abstract = {Gaze tracking in 3D has the potential to improve interaction with objects and visualizations in augmented reality. However, previous research showed that subjective perception of distance varies between real and virtual surroundings. We wanted to determine whether objectively measured 3D gaze depth through eye tracking also exhibits differences between entirely real and augmented environments. To this end, we conducted an experiment (N = 25) in which we used Microsoft HoloLens with a binocular eye tracking add-on from Pupil Labs. Participants performed a task that required them to look at stationary real and virtual objects while wearing a HoloLens device. We were not able to find significant differences in the gaze depth measured by eye tracking. Finally, we discuss our findings and their implications for gaze interaction in immersive analytics, and the quality of the collected gaze data.}, author = {Öney, Seyda and Rodrigues, Nils and Becher, Michael and Reina, Guido and Ertl, Thomas and Sedlmair, Michael and Weiskopf, Daniel}, booktitle = {Proceedings of the Symposium on Eye Tracking Research & Applications-Short Paper (ETRA-SP)}, doi = {10.1145/3379156.3391835}, pages = {49:1-49:5}, publisher = {ACM}, title = {Evaluation of Gaze Depth Estimation from Eye Tracking in Augmented Reality}, url = {https://doi.org/10.1145/3379156.3391835}, year = 2020 }
  Link
  https://doi.org/10.1145/3379156.3391835
12. Tang, Tan ; Li, Renzhong ; Wu, Xinke ; Liu, Shuhan ; Knittel, Johannes ; Koch, Steffen ; Yu, Lingyun ; Ren, Peiran ; u. a.: PlotThread: Creating Expressive Storyline Visualizations using Reinforcement Learning. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 27, IEEE (2020), Nr. 2, S. 294--303
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  @article{tang2020plotthread, author = {Tang, Tan and Li, Renzhong and Wu, Xinke and Liu, Shuhan and Knittel, Johannes and Koch, Steffen and Yu, Lingyun and Ren, Peiran and Ertl, Thomas and Wu, Yingcai}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = 2, pages = {294--303}, publisher = {IEEE}, title = {PlotThread: Creating Expressive Storyline Visualizations using Reinforcement Learning}, volume = 27, year = 2020 }
2019
1. Reina, Guido ; Gralka, Patrick ; Ertl, Thomas: A decade of particle-based scientific visualization. In: Holm, C. ; Ertl, T. ; Schmauder, S. ; Kästner, J. ; Groß, J. (Hrsg.) The European Physical Journal (Special Topics), The European Physical Journal (Special Topics). Bd. 227: Particle Methods in Natural Science and Engineering (2019), Nr. 14, S. 1705--1723
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  @article{Reina2019Scivis, abstract = {In this manuscript, we review the evolution of atomistic visualization over the last 12 years and put the development of the community in context with our own efforts within the DFG collaborative research center 716. The goal is to provide a comprehensive summary of all relevant work that has been conducted under the auspices of project D.3. In this project, we focused on the visualization and analysis of particle-based data sets, and on how to bring these visualizations onto the workstation of domain scientists without the need for a large rendering infrastructure. We discuss how our decisions and goals evolved over time and show the success stories and publications. Finally, we give an outlook on the challenges that still require additional research and to which extent the requirements and constraints of current research have changed the way visualization works after these 12 years.}, author = {Reina, Guido and Gralka, Patrick and Ertl, Thomas}, doi = {10.1140/epjst/e2019-800172-4}, editor = {Holm, C. and Ertl, T. and Schmauder, S. and Kästner, J. and Groß, J.}, issn = {1951-6401}, journal = {The European Physical Journal (Special Topics)}, number = 14, pages = {1705--1723}, title = {A decade of particle-based scientific visualization}, url = {https://doi.org/10.1140/epjst/e2019-800172-4}, volume = {227: Particle Methods in Natural Science and Engineering}, year = 2019 }
  Link
  https://doi.org/10.1140/epjst/e2019-800172-4
2. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: Pattern-Based Semantic and Temporal Exploration of Social Media Messages. In: 2019 IEEE Conference on Visual Analytics Science and Technology (VAST), 2019 IEEE Conference on Visual Analytics Science and Technology (VAST), 2019, S. 134–135
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  @inproceedings{8986950, author = {{Knittel}, Johannes and {Koch}, Steffen and {Ertl}, Thomas}, booktitle = {2019 IEEE Conference on Visual Analytics Science and Technology (VAST)}, pages = {134-135}, title = {Pattern-Based Semantic and Temporal Exploration of Social Media Messages}, year = 2019 }
3. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: Interactive Hierarchical Quote Extraction for Content Insights. In: Madeiras Pereira, J. ; Raidou, R. G. (Hrsg.) ; Madeiras Pereira, J. ; Raidou, R. G. (Hrsg.): EuroVis 2019 - Posters, EuroVis 2019 - Posters : The Eurographics Association, 2019 — ISBN 978-3-03868-088-8
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  @inproceedings{rp.20191134, author = {Knittel, Johannes and Koch, Steffen and Ertl, Thomas}, booktitle = {EuroVis 2019 - Posters}, doi = {10.2312/eurp.20191134}, editor = {Madeiras Pereira, João and Raidou, Renata Georgia}, isbn = {978-3-03868-088-8}, publisher = {The Eurographics Association}, title = {{Interactive Hierarchical Quote Extraction for Content Insights}}, url = {https://diglib.eg.org/handle/10.2312/eurp20191134}, year = 2019 }
  Link
  https://diglib.eg.org/handle/10.2312/eurp20191134
4. Schatz, Karsten ; Müller, Christoph ; Gralka, Patrick ; Heinemann, Moritz ; Straub, Alexander ; Schulz, Christoph ; Braun, Matthias ; Rau, Tobias ; u. a.: Visual Analysis of Structure Formation in Cosmic Evolution. In: Proceedings of the IEEE Scientific Visualization Conference (SciVis), Proceedings of the IEEE Scientific Visualization Conference (SciVis), 2019, S. 33–41
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  @inproceedings{schatz2019visual, abstract = {The IEEE SciVis 2019 Contest targets the visual analysis of structure formation in the cosmic evolution of the universe from when the universe was five million years old up to now. In our submission, we analyze high-dimensional data to get an overview, then investigate the impact of Active Galactic Nuclei (AGNs) using various visualization techniques, for instance, an adapted filament filtering method for detailed analysis and particle flow in the vicinity of filaments. Based on feedback from domain scientists on these initial visualizations, we also analyzed X-ray emissions and star formation areas. The conversion of star-forming gas to stars and the resulting increasing molecular weight of the particles could be observed.}, author = {Schatz, Karsten and Müller, Christoph and Gralka, Patrick and Heinemann, Moritz and Straub, Alexander and Schulz, Christoph and Braun, Matthias and Rau, Tobias and Becher, Michael and Diehl, Patrick and Marcello, Dominic and Frank, Juhan and Müller, Thomas and Frey, Steffen and Reina, Guido and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the IEEE Scientific Visualization Conference (SciVis)}, doi = {10.1109/scivis47405.2019.8968855}, pages = {33-41}, title = {Visual Analysis of Structure Formation in Cosmic Evolution}, url = {https://ieeexplore.ieee.org/abstract/document/8968855}, year = 2019 }
  Link
  https://ieeexplore.ieee.org/abstract/document/8968855
5. Bruder, Valentin ; Schulz, Christoph ; Bauer, Ruben ; Frey, Steffen ; Weiskopf, Daniel ; Ertl, Thomas: Voronoi-Based Foveated Volume Rendering. In: Johansson, J. ; Sadlo, F. ; Marai, G. E. (Hrsg.) ; Johansson, J. ; Sadlo, F. ; Marai, G. E. (Hrsg.): Proceedings of the Eurographics Conference on Visualization - Short Papers (EuroVis), Proceedings of the Eurographics Conference on Visualization - Short Papers (EuroVis) : Eurographics Association, 2019 — ISBN 978-3-03868-090-1, S. 67–71
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  @inproceedings{conf/vissym/BruderSBFWE19, abstract = {Foveal vision is located in the center of the field of view with a rich impression of detail and color, whereas peripheral visionoccurs on the side with more fuzzy and colorless perception. This visual acuity fall-off can be used to achieve higher frame ratesby adapting rendering quality to the human visual system. Volume raycasting has unique characteristics, preventing a directtransfer of many traditional foveated rendering techniques. We present an approach that utilizes the visual acuity fall-off toaccelerate volume rendering based on Linde-Buzo-Gray sampling and natural neighbor interpolation. First, we measure gazeusing a stationary 1200 Hz eye-tracking system. Then, we adapt our sampling and reconstruction strategy to that gaze. Finally,we apply a temporal smoothing filter to attenuate undersampling artifacts since peripheral vision is particularly sensitive tocontrast changes and movement. Our approach substantially improves rendering performance with barely perceptible changes invisual quality. We demonstrate the usefulness of our approach through performance measurements on various data se}, author = {Bruder, Valentin and Schulz, Christoph and Bauer, Ruben and Frey, Steffen and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the Eurographics Conference on Visualization - Short Papers (EuroVis)}, doi = {10.2312/evs.20191172}, editor = {Johansson, Jimmy and Sadlo, Filip and Marai, G. Elisabeta}, ee = {https://doi.org/10.2312/evs.20191172}, isbn = {978-3-03868-090-1}, pages = {67-71}, publisher = {Eurographics Association}, title = {Voronoi-Based Foveated Volume Rendering}, url = {https://doi.org/10.2312/evs.20191172}, year = 2019 }
  Link
  https://doi.org/10.2312/evs.20191172
6. Bruder, Valentin ; Kurzhals, Kuno ; Frey, Steffen ; Weiskopf, Daniel ; Ertl, Thomas: Space-Time Volume Visualization of Gaze and Stimulus. In: Krejtz, K. ; Sharif, B. (Hrsg.) ; Krejtz, K. ; Sharif, B. (Hrsg.): Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA), Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA) : ACM, 2019 — ISBN 978-1-4503-6709-7, S. 12:1-12:9
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  @inproceedings{conf/etra/BruderKFWE19, abstract = {We present a method for the spatio-temporal analysis of gaze data from multiple participants in the context of a video stimulus. For such data, an overview of the recorded patterns is important to identify common viewing behavior (such as attentional synchrony) and outliers. We adopt the approach of space-time cube visualization, which extends the spatial dimensions of the stimulus by time as the third dimension. Previous work mainly handled eye tracking data in the space-time cube as point cloud, providing no information about the stimulus context. This paper presents a novel visualization technique that combines gaze data, a dynamic stimulus, and optical flow with volume rendering to derive an overview of the data with contextual information. With specifically designed transfer functions, we emphasize different data aspects, making the visualization suitable for explorative analysis and for illustrative support of statistical findings alike.}, author = {Bruder, Valentin and Kurzhals, Kuno and Frey, Steffen and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the Symposium on Eye Tracking Research & Applications (ETRA)}, doi = {10.1145/3314111.3319812}, editor = {Krejtz, Krzysztof and Sharif, Bonita}, ee = {https://doi.org/10.1145/3314111.3319812}, isbn = {978-1-4503-6709-7}, pages = {12:1-12:9}, publisher = {ACM}, title = {Space-Time Volume Visualization of Gaze and Stimulus}, url = {https://doi.org/10.1145/3314111.3319812}, year = 2019 }
  Link
  https://doi.org/10.1145/3314111.3319812
7. Gralka, Patrick ; Becher, Michael ; Braun, Matthias ; Frieß, Florian ; Müller, Christoph ; Rau, Tobias ; Schatz, Karsten ; Schulz, Christoph ; u. a.: MegaMol -- a comprehensive prototyping framework for visualizations. In: The European Physical Journal (Special Topics), The European Physical Journal (Special Topics). Bd. 227: Particle Methods in Natural Science and Engineering (2019), Nr. 14, S. 1817--1829
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  @article{Gralka2019Megamol, abstract = {We present MegaMol, a low-overhead prototyping framework for interactive visualization of large scientific data sets. We give a brief summary of related work for context and then focus on a comprehensive overview of the core architecture of the framework. This is followed by the existing and novel features and techniques in MegaMol that define its current functionality. MegaMol has originally been developed to support the visualization and analysis of particle-based data sets that, for instance, come from molecular dynamics simulations. Meanwhile, the software has evolved beyond that. New algorithms and techniques have been implemented to handle many diverse tasks, including information visualization. Additionally, improvements have been made on the software engineering side to make MegaMol more accessible for domain scientists, like an easy-to-handle scripting interface.}, author = {Gralka, Patrick and Becher, Michael and Braun, Matthias and Frieß, Florian and Müller, Christoph and Rau, Tobias and Schatz, Karsten and Schulz, Christoph and Krone, Michael and Reina, Guido and Ertl, Thomas}, doi = {10.1140/epjst/e2019-800167-5}, issn = {1951-6401}, journal = {The European Physical Journal (Special Topics)}, number = 14, pages = {1817--1829}, title = {MegaMol -- a comprehensive prototyping framework for visualizations}, url = {https://doi.org/10.1140/epjst/e2019-800167-5}, volume = {227: Particle Methods in Natural Science and Engineering}, year = 2019 }
  Link
  https://doi.org/10.1140/epjst/e2019-800167-5
8. Pflueger, Hermann ; Thom, Dennis ; Schuetz, Anna Christina ; Bohde, Daniela ; Ertl, Thomas: VeCHArt: Visually Enhanced Comparison of Historic Art Using an Automated Line-based Synchronization Technique. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2019)
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  @article{pflueger2019vechart, author = {Pflueger, Hermann and Thom, Dennis and Schuetz, Anna Christina and Bohde, Daniela and Ertl, Thomas}, doi = {10.1109/TVCG.2019.2908166}, journal = {IEEE Transactions on Visualization and Computer Graphics }, language = {English}, month = mar, title = {VeCHArt: Visually Enhanced Comparison of Historic Art Using an Automated Line-based Synchronization Technique}, year = 2019 }
9. Müller, Christoph ; Braun, Matthias ; Ertl, Thomas: Optimised Molecular Graphics on the HoloLens. In: IEEE Conference on Virtual Reality and 3D User Interfaces, VR 2019, Osaka, Japan, March 23-27, 2019, IEEE Conference on Virtual Reality and 3D User Interfaces, VR 2019, Osaka, Japan, March 23-27, 2019 : IEEE, 2019, S. 97--102
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  @inproceedings{DBLP:conf/vr/MuilerBE19, abstract = {The advent of modern and affordable augmented reality head sets like Microsoft HoloLens has sparked new interest in using virtual and augmented reality technology in the analysis of molecular data. For all visualisation in immersive, mixed-reality scenarios, a sufficiently high rendering speed is an important factor, which leads to the issue of limited processing power available on fully untethered devices facing the situation of handling computationally expensive visualisations. Recent research shows that the space-filling model of even small data sets from the Protein Data Bank (PDB) cannot be rendered at desirable frame rates on the HoloLens. In this work, we report on how to improve the rendering speed of atom-based visualisation of proteins and how the rendering of more abstract representations of the molecules compares against it. We complement our findings with in-depth GPU and CPU performance numbers.}, author = {Müller, Christoph and Braun, Matthias and Ertl, Thomas}, bibsource = {dblp computer science bibliography, https://dblp.org}, booktitle = {IEEE Conference on Virtual Reality and 3D User Interfaces, VR 2019, Osaka, Japan, March 23-27, 2019}, doi = {10.1109/VR.2019.8798111}, pages = {97--102}, publisher = {IEEE}, title = {Optimised Molecular Graphics on the HoloLens}, url = {https://doi.org/10.1109/VR.2019.8798111}, year = 2019 }
  Link
  https://doi.org/10.1109/VR.2019.8798111
10. Rau, Tobias ; Gralka, Patrick ; Fernandes, Oliver ; Reina, Guido ; Frey, Steffen ; Ertl, Thomas: The Impact of Work Distribution on in Situ Visualization: A Case Study. In: Proceedings of the Workshop on In Situ Infrastructures for Enabling Extreme-Scale Analysis and Visualization, Proceedings of the Workshop on In Situ Infrastructures for Enabling Extreme-Scale Analysis and Visualization. Denver, Colorado : ACM, 2019 — ISBN 978-1-4503-7723-2, S. 17--22
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  @inproceedings{rau2019insitu, acmid = {3364233}, address = {New York, NY, USA}, author = {Rau, Tobias and Gralka, Patrick and Fernandes, Oliver and Reina, Guido and Frey, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the Workshop on In Situ Infrastructures for Enabling Extreme-Scale Analysis and Visualization}, doi = {10.1145/3364228.3364233}, isbn = {978-1-4503-7723-2}, location = {Denver, Colorado}, numpages = {6}, pages = {17--22}, publisher = {ACM}, series = {ISAV '19}, title = {The Impact of Work Distribution on in Situ Visualization: A Case Study}, url = {http://doi.acm.org/10.1145/3364228.3364233}, year = 2019 }
  Link
  http://doi.acm.org/10.1145/3364228.3364233
11. Schatz, Karsten ; Krone, Michael ; Bauer, Tabea L. ; Ferrario, Valerio ; Pleiss, Jürgen ; Ertl, Thomas: Molecular Sombreros: Abstract Visualization of Binding Sites within Proteins. In: Eurographics Workshop on Visual Computing for Biology and Medicine, Eurographics Workshop on Visual Computing for Biology and Medicine : The Eurographics Association, 2019 — ISBN 978-3-03868-081-9, S. 225–237
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  @inproceedings{schatz2019molecular, abstract = {We present a novel abstract visualization for the binding sites of proteins. Binding sites play an essential role in enzymatic reactions and are, thus, often investigated in structural biology. They are typically located within cavities. The shape and properties of the cavity influence whether and how easily a substrate can reach the active site where the reaction is triggered. Molecular surface visualizations can help to analyze the accessibility of binding sites, but are typically prone to visual clutter. Our novel abstract visualization shows the cavity containing the binding site as well as the surface region directly surrounding the cavity entrance in a simplified manner. The resulting visualization resembles a hat, where the brim depicts the surrounding surface region and the crown the cavity. Hence, we dubbed our abstraction Molecular Sombrero, using the Spanish term for 'hat'. Our abstraction is less cluttered than traditional molecular surface visualizations. It highlights important parameters, like cavity diameter, by mapping them to the shape of the sombrero. The visual abstraction also facilitates an easy side-by-side comparison of different data sets. We show the applicability of our Molecular Sombreros to different real-world use cases.}, author = {Schatz, Karsten and Krone, Michael and Bauer, Tabea L. and Ferrario, Valerio and Pleiss, Jürgen and Ertl, Thomas}, booktitle = {Eurographics Workshop on Visual Computing for Biology and Medicine}, doi = {10.2312/vcbm.20191248}, isbn = {978-3-03868-081-9}, issn = {2070-5786}, pages = {225-237}, publisher = {The Eurographics Association}, title = {Molecular Sombreros: Abstract Visualization of Binding Sites within Proteins}, url = {https://doi.org/10.2312/vcbm.20191248}, year = 2019 }
  Link
  https://doi.org/10.2312/vcbm.20191248
12. Tkachev, Gleb ; Frey, Steffen ; Ertl, Thomas: Local Prediction Models for Spatiotemporal Volume Visualization. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2019)
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  @article{tkachev2019local, abstract = {We present a machine learning-based approach for detecting and visualizing complex behavior in spatiotemporal volumes. For this, we train models to predict future data values at a given position based on the past values in its neighborhood, capturing common temporal behavior in the data. We then evaluate the model's prediction on the same data. High prediction error means that the local behavior was too complex, unique or uncertain to be accurately captured during training, indicating spatiotemporal regions with interesting behavior. By training several models of varying capacity, we are able to detect spatiotemporal regions of various complexities. We aggregate the obtained prediction errors into a time series or spatial volumes and visualize them together to highlight regions of unpredictable behavior and how they differ between the models. We demonstrate two further volumetric applications: adaptive timestep selection and analysis of ensemble dissimilarity. We apply our technique to datasets from multiple application domains and demonstrate that we are able to produce meaningful results while making minimal assumptions about the underlying data.}, author = {Tkachev, Gleb and Frey, Steffen and Ertl, Thomas}, doi = {10.1109/TVCG.2019.2961893}, issn = {2160-9306}, journal = {IEEE Transactions on Visualization and Computer Graphics}, title = {Local Prediction Models for Spatiotemporal Volume Visualization}, year = 2019 }
13. Baumann, Martin ; John, Markus ; Pflüger, Hermann ; Herberichs, Cornelia ; Viehhauser, Gabriel ; Knopki, Wolfgang ; Ertl, Thomas: An Interactive Visualization for the Analysis of Annotated Text Variance in the Legendary Der Heiligen Leben, Redaktion. In: Leipzig Symp. Vis. App. (LEVIA ’19), Leipzig Symp. Vis. App. (LEVIA ’19), 2019
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  @inproceedings{Baumann.2019e, author = {Baumann, Martin and John, Markus and Pfl{\"u}ger, Hermann and Herberichs, Cornelia and Viehhauser, Gabriel and Knopki, Wolfgang and Ertl, Thomas}, booktitle = {Leipzig Symp. Vis. App. (LEVIA '19)}, doi = {10.31219/osf.io/wd9yz}, title = {{An Interactive Visualization for the Analysis of Annotated Text Variance in the Legendary Der Heiligen Leben, Redaktion}}, year = 2019 }
14. Schatz, Karsten ; Krone, Michael ; Pleiss, Jürgen ; Ertl, Thomas: Interactive visualization of biomolecules’ dynamic and complex properties. In: Holm, C. ; Ertl, T. ; Schmauder, S. ; Kästner, J. ; Groß, J. (Hrsg.) The European Physical Journal (Special Topics), The European Physical Journal (Special Topics). Bd. 227: Particle Methods in Natural Science and Engineering (2019), Nr. 14, S. 1725--1739
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  @article{schatz2019interactive, abstract = {In this paper, we review the advances in molecular visualization over the last 12 years and put the development of the community in context with our own efforts in the DFG Collaborative Research Center (CRC) 716. This includes advances in the field of molecular surface computation and rendering, interactive extraction of protein cavities, and comparative visualization for biomolecules. Our main focus was on the development of methods that assist the interactive and explorative visual analysis of large, dynamic molecular data sets on single desktop computers. To meet this goal, we often developed GPU-accelerated algorithms, which is in line with the general research direction of the field. Over the last years, we made seminal contributions to the field of molecular visualization, which partially still constitute the state of the art development or provided the basis for follow-up works}, author = {Schatz, Karsten and Krone, Michael and Pleiss, Jürgen and Ertl, Thomas}, doi = {https://doi.org/10.1140/epjst/e2019-800162-y}, editor = {Holm, C. and Ertl, T. and Schmauder, S. and Kästner, J. and Groß, J.}, journal = {The European Physical Journal (Special Topics)}, number = 14, pages = {1725--1739}, title = {Interactive visualization of biomolecules' dynamic and complex properties}, url = {https://epjst.epj.org/articles/epjst/abs/2019/02/epjst1800162/epjst1800162.html}, volume = {227: Particle Methods in Natural Science and Engineering}, year = 2019 }
  Link
  https://epjst.epj.org/articles/epjst/abs/2019/02/epjst1800162/epjst1800162.html
15. John, Markus ; Baumann, Martin ; Schuetz, David ; Koch, Steffen ; Ertl, Thomas: A Visual Approach for the Comparative Analysis of Character Networks in Narrative Texts. In: Proc. IEEE Pac. Vis. Symp. (PacificVis), Proc. IEEE Pac. Vis. Symp. (PacificVis), 2019, S. 247--256
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  @inproceedings{John.2019, author = {John, Markus and Baumann, Martin and Schuetz, David and Koch, Steffen and Ertl, Thomas}, booktitle = {Proc. IEEE Pac. Vis. Symp. (PacificVis)}, pages = {247--256}, title = {{A Visual Approach for the Comparative Analysis of Character Networks in Narrative Texts}}, year = 2019 }
16. Tabiai, Ilyass ; Tkachev, Gleb ; Diehl, Patrick ; Frey, Steffen ; Ertl, Thomas ; Therriault, Daniel ; Lévesque, Martin: Hybrid image processing approach for autonomous crack area detection and tracking using local digital image correlation results applied to single-fiber interfacial debonding. In: Engineering Fracture Mechanics, Engineering Fracture Mechanics. Bd. 216 (2019), S. 106485
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  @article{tabiai2019hybrid, abstract = {Local digital image correlation is a popular method for accurate full field displacement measurements. However, the technique struggles at autonomously tracking emerging and propagating cracks. We proposed a hybrid approach which utilizes image processing techniques in combination with local digital image correlation to autonomously monitor cracks in a mechanically loaded specimen. Our approach can extract and track crack surfaces and provide a volume-based visualization of the crack growth. This approach was applied to single-fiber composite experimental results with interfacial debonding from the literature. Results quantitatively show that strong interfacial fiber/matrix bonding leads to slower interfacial crack growth, delays interfacial crack growth in the matrix, requires higher loadings for crack growth and shows a specific crack path distinct from the one obtained for weak interfaces. The approach was also validated against a manual approach where a domain scientist extracts a crack using a polygon extraction tool. The method can be used on any local digital image correlation results involving damage observations.}, author = {Tabiai, Ilyass and Tkachev, Gleb and Diehl, Patrick and Frey, Steffen and Ertl, Thomas and Therriault, Daniel and Lévesque, Martin}, doi = {https://doi.org/10.1016/j.engfracmech.2019.106485}, issn = {0013-7944}, journal = {Engineering Fracture Mechanics}, pages = 106485, title = {Hybrid image processing approach for autonomous crack area detection and tracking using local digital image correlation results applied to single-fiber interfacial debonding}, url = {http://www.sciencedirect.com/science/article/pii/S0013794418312530}, volume = 216, year = 2019 }
  Link
  http://www.sciencedirect.com/science/article/pii/S0013794418312530
17. Bruder, Valentin ; Lahmar, Houssem Ben ; Hlawatsch, Marcel ; Frey, Steffen ; Burch, Michael ; Weiskopf, Daniel ; Herschel, Melanie ; Ertl, Thomas: Volume-Based Large Dynamic Graph Analysis Supported by Evolution Provenance. In: Multimedia Tools and Applications, Multimedia Tools and Applications. Bd. 78 (2019), Nr. 23, S. 32939–32965
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  @article{journals/mta/BruderLHFBWHE19, abstract = {We present an approach for the visualization and interactive analysis of dynamic graphs that contain a large number of time steps. A specific focus is put on the support of analyzing temporal aspects in the data. Central to our approach is a static, volumetric representation of the dynamic graph based on the concept of space-time cubes that we create by stacking the adjacency matrices of all time steps. The use of GPU-accelerated volume rendering techniques allows us to render this representation interactively. We identified four classes of analytics methods as being important for the analysis of large and complex graph data, which we discuss in detail: data views, aggregation and filtering, comparison, and evolution provenance. Implementations of the respective methods are presented in an integrated application, enabling interactive exploration and analysis of large graphs. We demonstrate the applicability, usefulness, and scalability of our approach by presenting two examples for analyzing dynamic graphs. Furthermore, we let visualization experts evaluate our analytics approach.}, author = {Bruder, Valentin and Lahmar, Houssem Ben and Hlawatsch, Marcel and Frey, Steffen and Burch, Michael and Weiskopf, Daniel and Herschel, Melanie and Ertl, Thomas}, doi = {10.1007/s11042-019-07878-6}, ee = {https://doi.org/10.1007/s11042-019-07878-6}, journal = {Multimedia Tools and Applications}, number = 23, pages = {32939-32965}, title = {Volume-Based Large Dynamic Graph Analysis Supported by Evolution Provenance}, url = {https://doi.org/10.1007/s11042-019-07878-6}, volume = 78, year = 2019 }
  Link
  https://doi.org/10.1007/s11042-019-07878-6
18. Zhang, Hui ; Frey, Steffen ; Steeb, Holger ; Uribe, David ; Ertl, Thomas ; Wang, Wenping: Visualization of Bubble Formation in Porous Media. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 25 (2019), Nr. 1, S. 1060–1069
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  @article{journals/tvcg/ZhangFSUEW19, abstract = {We present a visualization approach for the analysis of CO 2 bubble-induced attenuation in porous rock formations. As a basis for this, we introduce customized techniques to extract CO 2 bubbles and their surrounding porous structure from X-ray computed tomography data (XCT) measurements. To understand how the structure of porous media influences the occurrence and the shape of formed bubbles, we automatically classify and relate them in terms of morphology and geometric features, and further directly support searching for promising porous structures. To allow for the meaningful direct visual comparison of bubbles and their structures, we propose a customized registration technique considering the bubble shape as well as its points of contact with the porous media surface. With our quantitative extraction of geometric bubble features, we further support the analysis as well as the creation of a physical model. We demonstrate that our approach was successfully used to answer several research questions in the domain, and discuss its high practical relevance to identify critical seismic characteristics of fluid-saturated rock that govern its capability to store CO 2.}, author = {Zhang, Hui and Frey, Steffen and Steeb, Holger and Uribe, David and Ertl, Thomas and Wang, Wenping}, doi = {10.1109/TVCG.2018.2864506}, ee = {http://doi.ieeecomputersociety.org/10.1109/TVCG.2018.2864506}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = 1, pages = {1060-1069}, title = {Visualization of Bubble Formation in Porous Media}, url = {https://ieeexplore.ieee.org/document/8445644}, volume = 25, year = 2019 }
  Link
  https://ieeexplore.ieee.org/document/8445644
2018
1. Herr, Dominik ; Reinhardt, Jan ; Reina, Guido ; Krüger, Robert ; Ferrari, Rafael V ; Ertl, Thomas: Immersive Modular Factory Layout Planning using Augmented Reality. In: elsevier (Hrsg.) Procedia CIRP, Procedia CIRP. Bd. 72, Elsevier (2018), S. 1112--1117
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  @article{herr2018immersive, author = {Herr, Dominik and Reinhardt, Jan and Reina, Guido and Krüger, Robert and Ferrari, Rafael V and Ertl, Thomas}, editor = {elsevier}, journal = {Procedia CIRP}, pages = {1112--1117}, publisher = {Elsevier}, title = {Immersive Modular Factory Layout Planning using Augmented Reality}, volume = 72, year = 2018 }
2. Müller, Christoph ; Krone, Michael ; Huber, Markus ; Biener, Verena ; Herr, Dominik ; Koch, Steffen ; Reina, Guido ; Weiskopf, Daniel ; u. a.: Interactive Molecular Graphics for Augmented Reality Using HoloLens. In: Schreiber, F. ; Hofestädt, R. (Hrsg.) Journal of Integrative Bioinformatics, Journal of Integrative Bioinformatics. (2018)
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  @article{mueller2018interactive, author = {Müller, Christoph and Krone, Michael and Huber, Markus and Biener, Verena and Herr, Dominik and Koch, Steffen and Reina, Guido and Weiskopf, Daniel and Ertl, Thomas}, doi = {10.1515/jib-2018-0005}, editor = {Schreiber, Falk and Hofestädt, Ralf}, journal = {Journal of Integrative Bioinformatics}, title = {Interactive Molecular Graphics for Augmented Reality Using HoloLens}, year = 2018 }
3. Baumann, Martin ; Koch, Steffen ; Minasyan, Harutyun ; Ertl, Thomas: Zooming on Tokens: Seamless Display Modes for Annotation Analysis. In: IEEE VIS - Posters, IEEE VIS - Posters, 2018. — Rezensiertes Poster
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  @inproceedings{Baumann.2018, author = {Baumann, Martin and Koch, Steffen and Minasyan, Harutyun and Ertl, Thomas}, booktitle = {IEEE VIS - Posters}, note = {Rezensiertes Poster}, title = {{Zooming on Tokens: Seamless Display Modes for Annotation Analysis}}, year = 2018 }
4. Frieß, Florian ; Landwehr, Mathias ; Bruder, Valentin ; Frey, Steffen ; Ertl, Thomas: Adaptive Encoder Settings for Interactive Remote Visualisation on High-Resolution Displays. In: Proceedings of the IEEE Symposium on Large Data Analysis and Visualization - Short Papers (LDAV), Proceedings of the IEEE Symposium on Large Data Analysis and Visualization - Short Papers (LDAV) : IEEE, 2018 — ISBN 978-1-5386-6873-3, S. 87–91
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  @inproceedings{conf/ldav/FriessLBFE18, abstract = {We present an approach that dynamically adapts encoder settings for image tiles to yield the best possible quality for a given bandwidth. This reduces the overall size of the image while preserving details. Our application determines the encoding settings in two steps. In the first step, we predict the quality and size of the tiles for different encoding settings using a convolutional neural network. In the second step, we assign the optimal encoder setting to each tile, so that the overall size of the image is lower than a predetermined threshold. Commonly, for tiles that contain complicated structures, a high quality setting is used in order to prevent major information loss, while quality settings are lowered for others to keep the size below the threshold. We demonstrate that we can reduce the overall size of the image while preserving the details in areas of interest using the example of both particle and volume visualisation applications.}, author = {Frieß, Florian and Landwehr, Mathias and Bruder, Valentin and Frey, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the IEEE Symposium on Large Data Analysis and Visualization - Short Papers (LDAV)}, doi = {10.1109/LDAV.2018.8739215}, ee = {https://doi.org/10.1109/LDAV.2018.8739215}, isbn = {978-1-5386-6873-3}, pages = {87-91}, publisher = {IEEE}, title = {Adaptive Encoder Settings for Interactive Remote Visualisation on High-Resolution Displays}, url = {https://ieeexplore.ieee.org/document/8739215}, year = 2018 }
  Link
  https://ieeexplore.ieee.org/document/8739215
5. Gralka, Patrick ; Grottel, Sebastian ; Staib, Joachim ; Schatz, Karsten ; Karch, Grzegorz Karol ; Hirschler, M. ; Krone, Michael ; Reina, Guido ; u. a.: 2016 IEEE Scientific Visualization Contest Winner: Visual and Structural Analysis of Point-based Simulation Ensembles. In: IEEE Computer Graphics & Applications, IEEE Computer Graphics & Applications. Bd. 38 (2018), Nr. 3, S. 106–117
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  @article{gralka2017sciviscontest2016, author = {Gralka, Patrick and Grottel, Sebastian and Staib, Joachim and Schatz, Karsten and Karch, Grzegorz Karol and Hirschler, M. and Krone, Michael and Reina, Guido and Gumhold, S. and Ertl, Thomas}, doi = {10.1109/MCG.2017.3301120}, journal = {IEEE Computer Graphics & Applications}, number = 3, pages = {106-117}, title = {2016 IEEE Scientific Visualization Contest Winner: Visual and Structural Analysis of Point-based Simulation Ensembles}, volume = 38, year = 2018 }
6. Schulz, Christoph ; Schatz, Karsten ; Krone, Michael ; Braun, Matthias ; Ertl, Thomas ; Weiskopf, Daniel: Uncertainty Visualization for Secondary Structures of Proteins. In: Proceedings of the IEEE Pacific Visualization Symposium (PacificVis), Proceedings of the IEEE Pacific Visualization Symposium (PacificVis) : IEEE, 2018, S. 96–105
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  @inproceedings{Schulz2018Uncertainty, abstract = {We present a technique that conveys the uncertainty in the secondary structure of proteins-an abstraction model based on atomic coordinates. While protein data inherently contains uncertainty due to the acquisition method or the simulation algorithm, we argue that it is also worth investigating uncertainty induced by analysis algorithms that precede visualization. Our technique helps researchers investigate differences between multiple secondary structure assignment methods. We modify established algorithms for fuzzy classification and introduce a discrepancy-based approach to project an ensemble of sequences to a single importance-weighted sequence. In 2D, we depict the aggregated secondary structure assignments based on the per-residue deviation in a collapsible sequence diagram. In 3D, we extend the ribbon diagram using visual variables such as transparency, wave form, frequency, or amplitude to facilitate qualitative analysis of uncertainty. We evaluated the effectiveness and acceptance of our technique through expert reviews using two example applications: the combined assignment against established algorithms and time-dependent structural changes originating from simulated protein dynamics.}, author = {Schulz, Christoph and Schatz, Karsten and Krone, Michael and Braun, Matthias and Ertl, Thomas and Weiskopf, Daniel}, booktitle = {Proceedings of the IEEE Pacific Visualization Symposium (PacificVis)}, doi = {10.1109/PacificVis.2018.00020}, pages = {96-105}, publisher = {IEEE}, title = {Uncertainty Visualization for Secondary Structures of Proteins}, url = {https://ieeexplore.ieee.org/document/8365980}, year = 2018 }
  Link
  https://ieeexplore.ieee.org/document/8365980
7. Bruder, Valentin ; Hlawatsch, Marcel ; Frey, Steffen ; Burch, Michael ; Weiskopf, Daniel ; Ertl, Thomas: Volume-Based Large Dynamic Graph Analytics. In: Banissi, E. ; Francese, R. ; Bannatyne, M. W. McK. ; Wyeld, T. G. ; Sarfraz, M. ; Pires, J. M. ; Ursyn, A. ; Bouali, F. ; u. a. (Hrsg.) ; Banissi, E. ; Francese, R. ; Bannatyne, M. W. McK. ; Wyeld, T. G. ; Sarfraz, M. ; Pires, J. M. ; Ursyn, A. ; Bouali, F. ; u. a. (Hrsg.): Proceedings of the International Conference Information Visualisation (IV), Proceedings of the International Conference Information Visualisation (IV) : IEEE, 2018 — ISBN 978-1-5386-7202-0, S. 210–219
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  @inproceedings{conf/iv/BruderHFBWE18, abstract = {We present an approach for interactively analyzing large dynamic graphs consisting of several thousand time steps with a particular focus on temporal aspects. we employ a static representation of the time-varying graph based on the concept of space-time cubes, i.e., we create a volumetric representation of the graph by stacking the adjacency matrices of each of its time steps. To achieve an efficient analysis of complex data, we discuss three classes of analytics methods of particular importance in this context: data views, aggregation and filtering, and comparison. For these classes, we present a GPU-based implementation of respective analysis methods that enable the interactive analysis of large graphs. We demonstrate the utility as well as the scalability of our approach by presenting application examples for analyzing different time-varying data sets.}, author = {Bruder, Valentin and Hlawatsch, Marcel and Frey, Steffen and Burch, Michael and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the International Conference Information Visualisation (IV)}, crossref = {conf/iv/2018}, doi = {10.1109/iV.2018.00045}, editor = {Banissi, Ebad and Francese, Rita and Bannatyne, Mark W. McK. and Wyeld, Theodor G. and Sarfraz, Muhammad and Pires, João Moura and Ursyn, Anna and Bouali, Fatma and Datia, Nuno and Venturini, Gilles and Polese, Giuseppe and Deufemia, Vincenzo and Mascio, Tania Di and Temperini, Marco and Sciarrone, Filippo and Malandrino, Delfina and Zaccagnino, Rocco and Díaz, Paloma and Papadopoulo, Fragkiskos and Anta, Antonio Fernández and Cuzzocrea, Alfredo and Risi, Michele and Erra, Ugo and Rossano, Veronica}, ee = {http://doi.ieeecomputersociety.org/10.1109/iV.2018.00045}, isbn = {978-1-5386-7202-0}, pages = {210-219}, publisher = {IEEE}, title = {Volume-Based Large Dynamic Graph Analytics}, url = {https://ieeexplore.ieee.org/document/8564163}, year = 2018 }
  Link
  https://ieeexplore.ieee.org/document/8564163
8. Knittel, Johannes ; Koch, Steffen ; Ertl, Thomas: Highlighting Text Regions of Interest with Character-Based LSTM Recurrent Networks. In: Postersession at the IEEE Conference on Visualization, Postersession at the IEEE Conference on Visualization, 2018. — Rezensiertes Poster
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  @inproceedings{Knittel2018, author = {Knittel, Johannes and Koch, Steffen and Ertl, Thomas}, booktitle = {Postersession at the IEEE Conference on Visualization}, note = {Rezensiertes Poster}, title = {Highlighting Text Regions of Interest with Character-Based LSTM Recurrent Networks}, venue = {Berlin}, year = 2018 }
2017
1. Rau, Tobias ; Krone, Michael ; Reina, Guido ; Ertl, Thomas: Challenges and Opportunities using Software-defined Visualization in MegaMol. In: 7th Workshop on Visual Analytics, Information Visualization and Scientific Visualization, 7th Workshop on Visual Analytics, Information Visualization and Scientific Visualization, 2017
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  @inproceedings{rau17ospray, author = {Rau, Tobias and Krone, Michael and Reina, Guido and Ertl, Thomas}, booktitle = {7th Workshop on Visual Analytics, Information Visualization and Scientific Visualization}, title = {Challenges and Opportunities using Software-defined Visualization in MegaMol}, year = 2017 }
2. Krone, Michael ; Frieß, Florian ; Scharnowski, Katrin ; Reina, Guido ; Fademrecht, Silvia ; Kulschewski, Tobias ; Pleiss, Jürgen ; Ertl, Thomas: Molecular Surface Maps. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 23 (2017), Nr. 1
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  - Link
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  @article{kronemolsurfmaps2016, author = {Krone, Michael and Frieß, Florian and Scharnowski, Katrin and Reina, Guido and Fademrecht, Silvia and Kulschewski, Tobias and Pleiss, Jürgen and Ertl, Thomas}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = 1, title = {Molecular Surface Maps}, url = {http://dx.doi.org/10.1109/TVCG.2016.2598824}, volume = 23, year = 2017 }
  Link
  http://dx.doi.org/10.1109/TVCG.2016.2598824
3. John, Markus ; Richter, Christian ; Kuczera, Andreas ; Koch, Steffen ; Ertl, Thomas: Interactive Visual Exploration of the Regesta Imperii. In: of the Digital Humanities 2017, P. (Hrsg.) ; of the Digital Humanities 2017, P. (Hrsg.): Proceedings of the Digital Humanities 2017, Proceedings of the Digital Humanities 2017 : Proceedings of the Digital Humanities 2017, 2017
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  BibTeX
  @inproceedings{b446ee4bdde14b66aa55e8b594100a81, author = {John, Markus and Richter, Christian and Kuczera, Andreas and Koch, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the Digital Humanities 2017}, editor = {of the Digital Humanities 2017, Proceedings}, privnote = {uid:2376}, publisher = {Proceedings of the Digital Humanities 2017}, title = {Interactive Visual Exploration of the Regesta Imperii }, year = 2017 }
4. Frey, Steffen ; Ertl, Thomas: Progressive Direct Volume-to-Volume Transformation. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 23, IEEE (2017), Nr. 1, S. 921–930. — IEEE VIS Conference, Baltimore, MD, Oct 23-28, 2016
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  BibTeX
  @article{frey2017progressive, abstract = {We present a novel technique to generate transformations between arbitrary volumes, providing both expressive distances and smooth interpolates. In contrast to conventional morphing or warping approaches, our technique requires no user guidance, intermediate representations (like extracted features), or blending, and imposes no restrictions regarding shape or structure. Our technique operates directly on the volumetric data representation, and while linear programming approaches could solve the underlying problem optimally, their polynomial complexity makes them infeasible for high-resolution volumes. We therefore propose a progressive refinement approach designed for parallel execution that is able to quickly deliver approximate results that are iteratively improved toward the optimum. On this basis, we further present a new approach for the streaming selection of time steps in temporal data that allows for the reconstruction of the full sequence with a user-specified error bound. We finally demonstrate the utility of our technique for different applications, compare our approach against alternatives, and evaluate its characteristics with a variety of different data sets.}, affiliation = {Frey, S (Reprint Author), Univ Stuttgart, Stuttgart, Germany. Frey, Steffen; Ertl, Thomas, Univ Stuttgart, Stuttgart, Germany.}, author = {Frey, Steffen and Ertl, Thomas}, da = {2018-02-15}, doi = {10.1109/TVCG.2016.2599042}, eissn = {1941-0506}, issn = {1077-2626}, journal = {IEEE Transactions on Visualization and Computer Graphics}, language = {English}, note = {IEEE VIS Conference, Baltimore, MD, Oct 23-28, 2016}, number = 1, pages = {921-930}, publisher = {IEEE}, research-areas = {Computer Science}, title = {Progressive Direct Volume-to-Volume Transformation}, type = {Article; Proceedings Paper}, unique-id = {ISI:000395537600095}, url = {https://ieeexplore.ieee.org/document/7539644}, volume = 23, year = 2017 }
  Link
  https://ieeexplore.ieee.org/document/7539644
5. Blascheck, Tanja ; Kurzhals, Kuno ; Raschke, Michael ; Burch, Michael ; Weiskopf, Daniel ; Ertl, Thomas: Visualization of Eye Tracking Data: A Taxonomy and Survey. In: Computer Graphics Forum, Computer Graphics Forum. (2017)
  - BibTeX
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  BibTeX
  @article{13482de5dc6345f782fced6978f08197, author = {Blascheck, Tanja and Kurzhals, Kuno and Raschke, Michael and Burch, Michael and Weiskopf, Daniel and Ertl, Thomas}, journal = {Computer Graphics Forum}, privnote = {uid:2367}, title = {Visualization of Eye Tracking Data: A Taxonomy and Survey}, url = {http://dx.doi.org/DOI: 10.1111/cgf.13079}, year = 2017 }
  Link
  http://dx.doi.org/DOI: 10.1111/cgf.13079
6. Bruder, Valentin ; Frey, Steffen ; Ertl, Thomas: Prediction-Based Load Balancing and Resolution Tuning for Interactive Volume Raycasting. In: Visual Informatics, Visual Informatics. Bd. 1 (2017), Nr. 2, S. 106–117
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  @article{journals/vi/BruderFE17, abstract = {We present an integrated approach for real-time performance prediction of volume raycasting that we employ for load balancing and sampling resolution tuning. In volume rendering, the usage of acceleration techniques such as empty space skipping and early ray termination, among others, can cause significant variations in rendering performance when users adjust the camera configuration or transfer function. These variations in rendering times may result in unpleasant effects such as jerky motions or abruptly reduced responsiveness during interactive exploration. To avoid those effects, we propose an integrated approach to adapt rendering parameters according to performance needs. We assess performance-relevant data on-the-fly, for which we propose a novel technique to estimate the impact of early ray termination. On the basis of this data, we introduce a hybrid model, to achieve accurate predictions with minimal computational footprint. Our hybrid model incorporates aspects from analytical performance modeling and machine learning, with the goal to combine their respective strengths. We show the applicability of our prediction model for two different use cases: (1) to dynamically steer the sampling density in object and/or image space and (2) to dynamically distribute the workload among several different parallel computing devices. Our approach allows to reliably meet performance requirements such as a user-defined frame rate, even in the case of sudden large changes to the transfer function or the camera orientation.}, author = {Bruder, Valentin and Frey, Steffen and Ertl, Thomas}, doi = {10.1016/j.visinf.2017.09.001}, ee = {https://doi.org/10.1016/j.visinf.2017.09.001}, journal = {Visual Informatics}, number = 2, pages = {106-117}, title = {Prediction-Based Load Balancing and Resolution Tuning for Interactive Volume Raycasting}, url = {https://doi.org/10.1016/j.visinf.2017.09.001}, volume = 1, year = 2017 }
  Link
  https://doi.org/10.1016/j.visinf.2017.09.001
7. Fernandes, Oliver ; Frey, Steffen ; Ertl, Thomas: Transportation-based Visualization of Energy Conversion. In: Springer (Hrsg.) ; Springer (Hrsg.): : SCITEPRESS, 2017
  - BibTeX
  BibTeX
  @inproceedings{b4bb963019144a82ad5072539d01e680, author = {Fernandes, Oliver and Frey, Steffen and Ertl, Thomas}, editor = {Springer}, privnote = {uid:2343}, publisher = {SCITEPRESS}, title = {Transportation-based Visualization of Energy Conversion}, year = 2017 }
8. John, Markus ; Koch, Steffen ; Ertl, Thomas: Uncertainty in Visual Text Analysis in the Context of the Digital Humanities. In: on CHI 2017), D. F. U. I. H. W. D. U. H. (Workshop (Hrsg.) ; on CHI 2017), D. F. U. I. H. W. D. U. H. (Workshop (Hrsg.): DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop on CHI 2017), DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop on CHI 2017) : DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop on CHI 2017), 2017
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  BibTeX
  @inproceedings{b516fb7766754029904887799774fdba, author = {John, Markus and Koch, Steffen and Ertl, Thomas}, booktitle = {DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop on CHI 2017)}, editor = {on CHI 2017), DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop}, privnote = {uid:2377}, publisher = {DESIGNING FOR UNCERTAINTY IN HCI: WHEN DOES UNCERTAINTY HELP? (Workshop on CHI 2017)}, title = {Uncertainty in Visual Text Analysis in the Context of the Digital Humanities}, year = 2017 }
9. Herr, Dominik ; Han, Qi ; Lohmann, Steffen ; Ertl, Thomas: Hierarchy-based projection of high-dimensional Labeled Data to Reduce Visual Clutter. In: Elsevier (Hrsg.) Computers & Graphics, Computers & Graphics. Bd. 62 (2017)
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  BibTeX
  @article{b7d21f4de5104845b0cb6b4e8fca1961, author = {Herr, Dominik and Han, Qi and Lohmann, Steffen and Ertl, Thomas}, editor = {Elsevier}, journal = {Computers & Graphics}, privnote = {uid:2352}, title = {Hierarchy-based projection of high-dimensional Labeled Data to Reduce Visual Clutter}, url = {http://dx.doi.org/10.1016/j.cag.2016.12.004}, volume = 62, year = 2017 }
  Link
  http://dx.doi.org/10.1016/j.cag.2016.12.004
10. Herr, Dominik ; Reinhardt, Jan ; Krüger, Robert ; Reina, Guido ; Ertl, Thomas: Immersive Visual Analytics for Modular Factory Layout Planning. In: IEEE (Hrsg.) ; IEEE (Hrsg.): Workshop on Immersive Analytics, Workshop on Immersive Analytics : IEEE, 2017
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  BibTeX
  @inproceedings{d25845bd6a0943eabe6907a6183b428d, author = {Herr, Dominik and Reinhardt, Jan and Krüger, Robert and Reina, Guido and Ertl, Thomas}, booktitle = {Workshop on Immersive Analytics}, editor = {IEEE}, privnote = {uid:2413}, publisher = {IEEE}, title = {Immersive Visual Analytics for Modular Factory Layout Planning}, year = 2017 }
11. Frey, Steffen ; Ertl, Thomas: Flow-Based Temporal Selection for Interactive Volume Visualization. In: Computer Graphics Forum, Computer Graphics Forum. Bd. 36 (2017), Nr. 8, S. 153–165
  - BibTeX
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  @article{frey2016flow, abstract = {We present an approach to adaptively select time steps from time‐dependent volume data sets for an integrated and comprehensive visualization. This reduced set of time steps not only saves cost, but also allows to show both the spatial structure and temporal development in one combined rendering. Our selection optimizes the coverage of the complete data on the basis of a minimum‐cost flow‐based technique to determine meaningful distances between time steps. As both optimal solutions of the involved transport and selection problem are prohibitively expensive, we present new approaches that are significantly faster with only minor deviations. We further propose an adaptive scheme for the progressive incorporation of new time steps. An interactive volume raycaster produces an integrated rendering of the selected time steps, and their computed differences are visualized in a dedicated chart to provide additional temporal similarity information. We illustrate and discuss the utility of our approach by means of different data sets from measurements and simulation.}, author = {Frey, Steffen and Ertl, Thomas}, doi = {10.1111/cgf.13070}, journal = {Computer Graphics Forum}, number = 8, pages = {153-165}, title = {Flow-Based Temporal Selection for Interactive Volume Visualization}, url = {https://doi.org/10.1111/cgf.13070}, volume = 36, year = 2017 }
  Link
  https://doi.org/10.1111/cgf.13070
12. Schatz, Karsten ; Krone, Michael ; Müller, Christoph ; Schneider, Jens ; Reina, Guido ; Ertl, Thomas: Visualization of Halo Topologies in Dark Matter Simulations. In: Proceedings of TopoInVis, Proceedings of TopoInVis, 2017. — Rezensiertes Abstract
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  BibTeX
  @inproceedings{schatz17topoinvis, author = {Schatz, Karsten and Krone, Michael and Müller, Christoph and Schneider, Jens and Reina, Guido and Ertl, Thomas}, booktitle = {Proceedings of TopoInVis}, note = {Rezensiertes Abstract}, title = {Visualization of Halo Topologies in Dark Matter Simulations}, year = 2017 }
13. Becher, Michael ; Krone, Michael ; Reina, Guido ; Ertl, Thomas: Feature-based Volumetric Terrain Generation. In: ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (i3D), ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (i3D), 2017
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  @inproceedings{becher17i3d, author = {Becher, Michael and Krone, Michael and Reina, Guido and Ertl, Thomas}, booktitle = {ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games (i3D)}, privnote = {uid:2337}, title = {Feature-based Volumetric Terrain Generation}, url = {http://dx.doi.org/10.1145/3023368.3023383}, year = 2017 }
  Link
  http://dx.doi.org/10.1145/3023368.3023383
14. Karch, Grzegorz Karol ; Beck, Fabian ; Ertl, Moritz ; Meister, Christian ; Schulte, Kathrin ; Weigand, Bernhard ; Ertl, Thomas ; Sadlo, Filip: Visual Analysis of Inclusion Dynamics in Two-Phase Flow. In: IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. (2017)
  - BibTeX
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  BibTeX
  @article{65b341b8ffbe4be1a4efffc0e462ee2f, author = {Karch, Grzegorz Karol and Beck, Fabian and Ertl, Moritz and Meister, Christian and Schulte, Kathrin and Weigand, Bernhard and Ertl, Thomas and Sadlo, Filip}, journal = {IEEE Transactions on Visualization and Computer Graphics}, privnote = {uid:2368}, title = {Visual Analysis of Inclusion Dynamics in Two-Phase Flow}, url = {http://dx.doi.org/10.1109/TVCG.2017.2692781}, year = 2017 }
  Link
  http://dx.doi.org/10.1109/TVCG.2017.2692781
15. Heinemann, Moritz ; Bruder, Valentin ; Frey, Steffen ; Ertl, Thomas: Power Efficiency of Volume Raycasting on Mobile Devices. In: Proceedings of the Eurographics Conference on Visualization (EuroVis) - Poster Track, Proceedings of the Eurographics Conference on Visualization (EuroVis) - Poster Track, 2017. — Poster
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  @inproceedings{heinemann2017power, abstract = {Power efficiency is one of the most important factors for the development of compute-intensive applications in the mobile domain. In this work, we evaluate and discuss the power consumption of a direct volume rendering app based on raycasting on a mobile system. For this, we investigate the influence of a broad set of algorithmic parameters, which are relevant for performance and rendering quality, on the energy usage of the system. Additionally, we compare an OpenCL implementation to a variant using OpenGL. By means of a variety of examples, we demonstrate that numerous factors can have a significant impact on power consumption. In particular, we also discuss the underlying reasons for the respective effects.}, author = {Heinemann, Moritz and Bruder, Valentin and Frey, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the Eurographics Conference on Visualization (EuroVis) - Poster Track}, doi = {10.2312/eurp.20171166}, note = {Poster}, title = {Power Efficiency of Volume Raycasting on Mobile Devices}, url = {http://dx.doi.org/10.2312/eurp.20171166}, year = 2017 }
  Link
  http://dx.doi.org/10.2312/eurp.20171166
16. Krone, Michael ; Reina, Guido ; Zahn, Sebastian ; Tremel, Tina ; Bahnmüller, Carsten ; Ertl, Thomas: Implicit Sphere Shadow Maps. In: IEEE PacificVis - Visualization Notes, IEEE PacificVis - Visualization Notes. Bd. 4, 2017
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  BibTeX
  @inproceedings{krone2017issm, author = {Krone, Michael and Reina, Guido and Zahn, Sebastian and Tremel, Tina and Bahnmüller, Carsten and Ertl, Thomas}, booktitle = {IEEE PacificVis - Visualization Notes}, title = {Implicit Sphere Shadow Maps}, volume = 4, year = 2017 }
17. Han, Qi ; Heimerl, Florian ; Codina-Filba, Joan ; Lohmann, Steffen ; Ertl, Thomas ; Wanner, Leo: Visual patent trend analysis for informed decision making in technology management. In: World Patent Information, World Patent Information. Bd. 49, 2017
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  BibTeX
  @inproceedings{Han201734, author = {Han, Qi and Heimerl, Florian and Codina-Filba, Joan and Lohmann, Steffen and Ertl, Thomas and Wanner, Leo}, booktitle = {World Patent Information }, privnote = {uid:2389}, title = {Visual patent trend analysis for informed decision making in technology management }, url = {http://dx.doi.org/https://doi.org/10.1016/j.wpi.2017.04.003}, volume = 49, year = 2017 }
  Link
  http://dx.doi.org/https://doi.org/10.1016/j.wpi.2017.04.003
18. Gralka, Patrick ; Schulz, Christoph ; Reina, Guido ; Weiskopf, Daniel ; Ertl, Thomas: Visual Exploration of Memory Traces and Call Stacks. In: Proceedings of the IEEE Working Conference on Software Visualization (VISSOFT), Proceedings of the IEEE Working Conference on Software Visualization (VISSOFT) : IEEE, 2017, S. 54–63
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  @inproceedings{Gralka2017Visual, abstract = {Analysis of software performance typically takes into account clock cycles and memory consumption at each sampling point in time. Although this is a valid strategy, we argue that it is also worth investigating data and control flow structures, as observed using memory traces and call stacks, because of their importance for performance engineering. In this work, we present a visual approach to memory profiling that supports analysis of memory layout, access patterns, and aliasing in correlation to program execution. Our method leverages language-agnostic dynamic code instrumentation to minimize the impact of tracing on performance, i.e., the application remains usable on commodity hardware. The profiled data is then clustered and visualized using a density-based scatter plot. If debug symbols are available, the scatter plot is augmented by a flame graph to ease linking to the high-level source code. Our visualization helps software engineers to identify runtime behavior by relating memory addresses to instruction execution. We demonstrate our approach using a set of examples revealing different memory access patterns and discuss their influence on software performance.}, author = {Gralka, Patrick and Schulz, Christoph and Reina, Guido and Weiskopf, Daniel and Ertl, Thomas}, booktitle = {Proceedings of the IEEE Working Conference on Software Visualization (VISSOFT)}, doi = {10.1109/VISSOFT.2017.15}, pages = {54-63}, publisher = {IEEE}, title = {Visual Exploration of Memory Traces and Call Stacks}, url = {https://dx.doi.org/10.1109/VISSOFT.2017.15}, year = 2017 }
  Link
  https://dx.doi.org/10.1109/VISSOFT.2017.15
19. John, Markus ; Bender, Michael ; Alscher, Stefan ; Müller, Andreas ; Koch, Steffen ; Kuhn, Jonas ; Richter, Sandra ; Rapp, Andrea ; u. a.: Korpuserschließung und Visualisierung deutschsprachiger Poetiken. In: Timme, F. & (Hrsg.) Digitale Geisteswissenschaften, Digitale Geisteswissenschaften., Frank & Timme (2017)
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  BibTeX
  @article{ec9ce291085f4a1ab7699c49483a138a, author = {John, Markus and Bender, Michael and Alscher, Stefan and Müller, Andreas and Koch, Steffen and Kuhn, Jonas and Richter, Sandra and Rapp, Andrea and Ertl, Thomas}, editor = {Timme, Frank &}, journal = {Digitale Geisteswissenschaften}, privnote = {uid:2379}, publisher = {Frank & Timme }, title = {Korpuserschließung und Visualisierung deutschsprachiger Poetiken}, year = 2017 }
20. Tkachev, Gleb ; Frey, Steffen ; Müller, Christoph ; Bruder, Valentin ; Ertl, Thomas: Prediction of Distributed Volume Visualization Performance to Support Render Hardware Acquisition. In: Proceedings of the Eurographics Symposium on Parallel Graphics and Visualization (EGPGV), Proceedings of the Eurographics Symposium on Parallel Graphics and Visualization (EGPGV) : Eurographics Association, 2017, S. 11–20
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  @inproceedings{tkachev2017prediction, abstract = {We present our data-driven, neural network-based approach to predicting the performance of a distributed GPU volume renderer for supporting cluster equipment acquisition. On the basis of timing measurements from a single cluster as well as from individual GPUs, we are able to predict the performance gain of upgrading an existing cluster with additional or faster GPUs, or even purchasing of a new cluster with a comparable network configuration. To achieve this, we employ neural networks to capture complex performance characteristics. However, merely relying on them for the prediction would require the collection of training data on multiple clusters with different hardware, which is impractical in most cases. Therefore, we propose a two-level approach to prediction, distinguishing between node and cluster level. On the node level, we generate performance histograms on individual nodes to capture local rendering performance. These performance histograms are then used to emulate the performance of different rendering hardware for cluster-level measurement runs. Crucially, this variety allows the neural network to capture the compositing performance of a cluster separately from the rendering performance on individual nodes. Therefore, we just need a performance histogram of the GPU of interest to generate a prediction. We demonstrate the utility of our approach using different cluster configurations as well as a range of image and volume resolutions.}, author = {Tkachev, Gleb and Frey, Steffen and Müller, Christoph and Bruder, Valentin and Ertl, Thomas}, doi = {10.2312/pgv.20171089}, journal = {Proceedings of the Eurographics Symposium on Parallel Graphics and Visualization (EGPGV)}, pages = {11-20}, publisher = {Eurographics Association}, title = {Prediction of Distributed Volume Visualization Performance to Support Render Hardware Acquisition}, url = {http://dx.doi.org/10.2312/pgv.20171089}, year = 2017 }
  Link
  http://dx.doi.org/10.2312/pgv.20171089
21. Hempert, Fabian ; Boblest, Sebastian ; Ertl, Thomas ; Sadlo, Filip ; Offenhäuser, Philipp ; Glass, Colin W. ; Hoffmann, Malte ; Beck, Andrea ; u. a.: Simulation of real gas effects in supersonic methane jets using a tabulated equation of state with a discontinuous Galerkin spectral element method. In: Computers & Fluids, Computers & Fluids. Bd. 145, Elsevier (2017)
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  BibTeX
  @article{dc738cc2020344b691219f33ddff8e5f, author = {Hempert, Fabian and Boblest, Sebastian and Ertl, Thomas and Sadlo, Filip and Offenhäuser, Philipp and Glass, Colin W. and Hoffmann, Malte and Beck, Andrea and Munz, Claus-Dieter and Iben, Uwe}, journal = {Computers & Fluids}, privnote = {uid:2344}, publisher = {Elsevier}, title = {Simulation of real gas effects in supersonic methane jets using a tabulated equation of state with a discontinuous Galerkin spectral element method}, volume = 145, year = 2017 }
22. Blascheck, Tanja ; Schweizer, Markus ; Beck, Fabian ; Ertl, Thomas: Visual Comparison of Eye Movement Patterns. In: Computer Graphics Forum, Computer Graphics Forum. Bd. 36 (2017), Nr. 3
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  BibTeX
  @article{2b9de77e98c84bb59f35cbe9c18facb1, author = {Blascheck, Tanja and Schweizer, Markus and Beck, Fabian and Ertl, Thomas}, journal = {Computer Graphics Forum}, number = 3, privnote = {uid:2366}, title = {Visual Comparison of Eye Movement Patterns}, volume = 36, year = 2017 }
23. Krone, Michael ; Schatz, Karsten ; Hieronymus, Nora ; Müller, Christoph ; Becher, Michael ; Barthelmes, Tina ; Cooper, April ; Currle, Steffen ; u. a.: From Visualization Research to Public Presentation - Design and Realization of a Scientific Exhibition. In: Proceedings of SIGRAD 2017, Proceedings of SIGRAD 2017, 2017
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  BibTeX
  @inproceedings{krone2017sigrad, author = {Krone, Michael and Schatz, Karsten and Hieronymus, Nora and Müller, Christoph and Becher, Michael and Barthelmes, Tina and Cooper, April and Currle, Steffen and Gralka, Patrick and Hlawatsch, Marcel and Pietrzyk, Lisa and Rau, Tobias and Reina, Guido and Trefft, Rene and Ertl, Thomas}, booktitle = {Proceedings of SIGRAD 2017}, title = {From Visualization Research to Public Presentation - Design and Realization of a Scientific Exhibition}, year = 2017 }
2016
1. Frey, Steffen ; Ertl, Thomas: Auto-Tuning Intermediate Representations for In Situ Visualization. In: Proceedings of the New York Scientific Data Summit (NYSDS), Proceedings of the New York Scientific Data Summit (NYSDS) : IEEE, 2016, S. 1–10
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  @inproceedings{frey2016auto, abstract = {Advances in high-accuracy measurement techniques and parallel computing systems for simulations lead to a widening gapbetween the rate at which data is generated and the rate at which it can be transferred and stored. In situ visualization directly tackles thisissue by processing—and with this reducing—data as soon as it is generated. This allows to create, transmit and store visualizations at amuch higher resolution than what would be possible otherwise with traditional approaches. So-called hybrid in situ visualization is apopular variant that transforms data into an intermediate visualization representation of reduced size. These intermediate representationscondense the original data by applying visualization techniques, but in contrast to the traditional result of a rendered image, they stillpreserve some degrees of freedom for live and a posteriori exploration and analysis. However, the configuration of the involvedprocessing steps requires careful configuration under the consideration of achieved quality and preserved degrees of freedom againstbandwidth and storage resources.To optimize the generation of intermediate representations for hybrid in situ visualization, we present our approach to (1) analyze andquantify the impact of input parameters, and (2) to auto-tune them on this basis under the consideration of different constraints. Wedemonstrate its application and evaluate respective results at the example of Volumetric Depth Images (VDIs), a view-dependentrepresentation for volumetric data. VDIs can quickly and flexibly be generated via a modified volume raycasting procedure that partitionsand partially composits samples along view rays. In particular, we study the impact of respective input parameters on this process w.r.t.the involved quality-space trade-off. We quantify rendering quality via image quality metrics and space requirements via the compressedsize of the intermediate representation. On this basis, we then automatically determine the parameter settings that yield the best qualityunder different constraints. We demonstrate the utility of our approach by means of a variety of different data sets, and show that weoptimize the achieved results without having to rely on tedious and time-consuming manual tweaking.}, author = {Frey, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the New York Scientific Data Summit (NYSDS)}, doi = {10.1109/NYSDS.2016.7747807}, pages = {1-10}, publisher = {IEEE}, title = {Auto-Tuning Intermediate Representations for In Situ Visualization}, url = {https://ieeexplore.ieee.org/document/7747807}, year = 2016 }
  Link
  https://ieeexplore.ieee.org/document/7747807
2. Müller, Christoph ; Krone, Michael ; Scharnowski, Katrin ; Reina, Guido ; Ertl, Thomas: An Evaluation of the Utility of Large High-Resolution Displays for Comparative Scientific Visualisation. In: International Journal of Software and Informatics (IJSI), International Journal of Software and Informatics (IJSI). Bd. 9 (2016), Nr. 3, S. 355–370
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  @article{ijsi2016powerwall, author = {Müller, Christoph and Krone, Michael and Scharnowski, Katrin and Reina, Guido and Ertl, Thomas}, journal = {International Journal of Software and Informatics (IJSI)}, number = 3, pages = {355-370}, title = {An Evaluation of the Utility of Large High-Resolution Displays for Comparative Scientific Visualisation}, volume = 9, year = 2016 }
3. Schulz, Christoph ; Nocaj, Arlind ; El-Assady, Mennatallah ; Frey, Steffen ; Hlawatsch, Marcel ; Hund, Michael ; Karch, Grzegorz Karol ; Netzel, Rudolf ; u. a.: Generative Data Models for Validation and Evaluation of Visualization Techniques. In: Proceedings of the Workshop on Beyond Time and Errors: Novel Evaluation Methods for Visualization (BELIV), Proceedings of the Workshop on Beyond Time and Errors: Novel Evaluation Methods for Visualization (BELIV) : ACM, 2016, S. 112–124
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  @inproceedings{2016SchulzGenerativeDataModels, abstract = {We argue that there is a need for substantially more research on the use of generative data models in the validation and evaluation of visualization techniques. For example, user studies will require the display of representative and uncon-founded visual stimuli, while algorithms will need functional coverage and assessable benchmarks. However, data is often collected in a semi-automatic fashion or entirely hand-picked, which obscures the view of generality, impairs availability, and potentially violates privacy. There are some sub-domains of visualization that use synthetic data in the sense of generative data models, whereas others work with real-world-based data sets and simulations. Depending on the visualization domain, many generative data models are "side projects" as part of an ad-hoc validation of a techniques paper and thus neither reusable nor general-purpose. We review existing work on popular data collections and generative data models in visualization to discuss the opportunities and consequences for technique validation, evaluation, and experiment design. We distill handling and future directions, and discuss how we can engineer generative data models and how visualization research could benefit from more and better use of generative data models.}, author = {Schulz, Christoph and Nocaj, Arlind and El-Assady, Mennatallah and Frey, Steffen and Hlawatsch, Marcel and Hund, Michael and Karch, Grzegorz Karol and Netzel, Rudolf and Schätzle, Christin and Butt, Miriam and Keim, Daniel A. and Ertl, Thomas and Brandes, Ulrik and Weiskopf, Daniel}, booktitle = {Proceedings of the Workshop on Beyond Time and Errors: Novel Evaluation Methods for Visualization (BELIV)}, doi = {10.1145/2993901.2993907}, pages = {112-124}, publisher = {ACM}, title = {Generative Data Models for Validation and Evaluation of Visualization Techniques}, url = {http://dx.doi.org/10.1145/2993901.2993907}, year = 2016 }
  Link
  http://dx.doi.org/10.1145/2993901.2993907
4. Blascheck, Tanja ; Beck, Fabian ; Baltes, Sebastian ; Ertl, Thomas ; Weiskopf, Daniel: Visual Analysis and Coding of Data-rich User Behavior. In: Andrienko, G. L. ; Liu, S. ; Stasko, J. T. (Hrsg.) ; Andrienko, G. L. ; Liu, S. ; Stasko, J. T. (Hrsg.): Proceedings of the IEEE Conference on Visual Analytics Science and Technology (VAST), Proceedings of the IEEE Conference on Visual Analytics Science and Technology (VAST) : IEEE, 2016 — ISBN 978-1-5090-5661-3, S. 141–150
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  BibTeX
  @inproceedings{conf/ieeevast/BlascheckBBEW16, abstract = {Investigating user behavior involves abstracting low-level events to higher-level concepts. This requires an analyst to study individual user activities, assign codes which categorize behavior, and develop a consistent classification scheme. To better support this reasoning process of an analyst, we suggest a novel visual analytics approach which integrates rich user data including transcripts, videos, eye movement data, and interaction logs. Word-sized visualizations embedded into a tabular representation provide a space-efficient and detailed overview of user activities. An analyst assigns codes, grouped into code categories, as part of an interactive process. Filtering and searching helps to select specific activities and focus an analysis. A comparison visualization summarizes results of coding and reveals relationships between codes. Editing features support efficient assignment, refinement, and aggregation of codes. We demonstrate the practical applicability and usefulness of our approach in a case study and describe expert feedback.}, author = {Blascheck, Tanja and Beck, Fabian and Baltes, Sebastian and Ertl, Thomas and Weiskopf, Daniel}, booktitle = {Proceedings of the IEEE Conference on Visual Analytics Science and Technology (VAST)}, doi = {10.1109/VAST.2016.7883520}, editor = {Andrienko, Gennady L. and Liu, Shixia and Stasko, John T.}, ee = {http://doi.ieeecomputersociety.org/10.1109/VAST.2016.7883520}, isbn = {978-1-5090-5661-3}, pages = {141-150}, publisher = {IEEE}, title = {Visual Analysis and Coding of Data-rich User Behavior}, url = {https://ieeexplore.ieee.org/document/7883520}, year = 2016 }
  Link
  https://ieeexplore.ieee.org/document/7883520
5. Krüger, Robert ; Koch, Steffen ; Ertl, Thomas: SaccadeLenses: Interactive Exploratory Filtering of Eye Tracking Trajectories. In: IEEE (Hrsg.) ; IEEE (Hrsg.): Second Workshop on Eye Tracking and VIsualization, Second Workshop on Eye Tracking and VIsualization. Bd. 2 : IEEE, 2016
  - BibTeX
  BibTeX
  @inproceedings{c14145e5cba94de4b5874e878b6f3393, author = {Krüger, Robert and Koch, Steffen and Ertl, Thomas}, booktitle = {Second Workshop on Eye Tracking and VIsualization}, editor = {IEEE}, privnote = {uid:2330}, publisher = {IEEE}, title = {SaccadeLenses: Interactive Exploratory Filtering of Eye Tracking Trajectories}, volume = 2, year = 2016 }
6. Kurzhals, Kuno ; Hlawatsch, Marcel ; Heimerl, Florian ; Burch, Michael ; Ertl, Thomas ; Weiskopf, Daniel: Gaze Stripes: Image-based Visualization of Eye Tracking Data. In: IEEE (Hrsg.) IEEE Transactions on Visualization and Computer Graphics, IEEE Transactions on Visualization and Computer Graphics. Bd. 22 (2016), Nr. 1, S. 1005–1014
  - BibTeX
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  BibTeX
  @article{5b12d7ad277a4f55bcd6bd7f5dea5c72, abstract = {We present a new visualization approach for displaying eye tracking data from multiple participants. We aim to show the spatio-temporal data of the gaze points in the context of the underlying image or video stimulus without occlusion. Our technique, denoted as gaze stripes, does not require the explicit definition of areas of interest but directly uses the image data around the gaze points, similar to thumbnails for images. A gaze stripe consists of a sequence of such gaze point images, oriented along a horizontal timeline. By displaying multiple aligned gaze stripes, it is possible to analyze and compare the viewing behavior of the participants over time. Since the analysis is carried out directly on the image data, expensive post-processing or manual annotation are not required. Therefore, not only patterns and outliers in the participants' scanpaths can be detected, but the context of the stimulus is available as well. Furthermore, our approach is especially well suited for dynamic stimuli due to the non-aggregated temporal mapping. Complementary views, i.e., markers, notes, screenshots, histograms, and results from automatic clustering, can be added to the visualization to display analysis results. We illustrate the usefulness of our technique on static and dynamic stimuli. Furthermore, we discuss the limitations and scalability of our approach in comparison to established visualization techniques.}, author = {Kurzhals, Kuno and Hlawatsch, Marcel and Heimerl, Florian and Burch, Michael and Ertl, Thomas and Weiskopf, Daniel}, doi = {10.1109/TVCG.2015.2468091}, editor = {IEEE}, journal = {IEEE Transactions on Visualization and Computer Graphics}, number = 1, pages = {1005-1014}, title = {Gaze Stripes: Image-based Visualization of Eye Tracking Data}, url = {http://dx.doi.org/10.1109/TVCG.2015.2468091}, volume = 22, year = 2016 }
  Link
  http://dx.doi.org/10.1109/TVCG.2015.2468091
7. Heimerl, Florian ; John, Markus ; Han, Qi ; Koch, Steffen ; Ertl, Thomas: DocuCompass: Effective exploration of document landscapes. In: on Visual Analytics Science, I. C. ; (VAST), T. (Hrsg.) ; on Visual Analytics Science, I. C. ; (VAST), T. (Hrsg.): IEEE Conference on Visual Analytics Science and Technology (VAST), IEEE Conference on Visual Analytics Science and Technology (VAST) : IEEE Transactions on Visualization and Computer Graphics, 2016
  - BibTeX
  BibTeX
  @inproceedings{DocuCompass, author = {Heimerl, Florian and John, Markus and Han, Qi and Koch, Steffen and Ertl, Thomas}, booktitle = {IEEE Conference on Visual Analytics Science and Technology (VAST)}, editor = {on Visual Analytics Science, IEEE Conference and (VAST), Technology}, privnote = {uid:2374}, publisher = {IEEE Transactions on Visualization and Computer Graphics}, title = {DocuCompass: Effective exploration of document landscapes}, year = 2016 }
8. Fernandes, Oliver ; Frey, Steffen ; Ertl, Thomas: Interpolation-Based Extraction of Representative Isosurfaces. In: Lecture Notes in Computer Science, Lecture Notes in Computer Science, 2016
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  @inproceedings{e28702152ec04547be85fab90daa3ec3, author = {Fernandes, Oliver and Frey, Steffen and Ertl, Thomas}, booktitle = {Lecture Notes in Computer Science}, privnote = {uid:2322}, title = {Interpolation-Based Extraction of Representative Isosurfaces}, year = 2016 }
9. Alscher, Stefan ; Bender, Michael ; John, Markus ; Müller, Andreas ; Richter, Sandra ; Rapp, Andrea ; Ertl, Thomas ; Koch, Steffen ; u. a.: ePoetics – Korpuserschließung und Visualisierung deutschsprachiger Poetiken (1770-1960) für den ‚Algorithmic Criticism. In: of the Digital Humanities im deutschprachigen Raum 2016, P. (Hrsg.) ; of the Digital Humanities im deutschprachigen Raum 2016, P. (Hrsg.): Proceedings of the Digital Humanities im deutschprachigen Raum 2016, Proceedings of the Digital Humanities im deutschprachigen Raum 2016. Bd. 2016 : Proceedings of the Digital Humanities im deutschprachigen Raum 2016, 2016
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  BibTeX
  @inproceedings{cb79438ff5e34028a4db38f7efb2a654, author = {Alscher, Stefan and Bender, Michael and John, Markus and Müller, Andreas and Richter, Sandra and Rapp, Andrea and Ertl, Thomas and Koch, Steffen and Kuhn, Jonas}, booktitle = {Proceedings of the Digital Humanities im deutschprachigen Raum 2016}, editor = {of the Digital Humanities im deutschprachigen Raum 2016, Proceedings}, privnote = {uid:2378}, publisher = {Proceedings of the Digital Humanities im deutschprachigen Raum 2016}, title = {ePoetics – Korpuserschließung und Visualisierung deutschsprachiger Poetiken (1770-1960) für den ‚Algorithmic Criticism}, volume = 2016, year = 2016 }
10. Hempert, Fabian ; Boblest, Sebastian ; Hoffmann, Malte ; Offenhäuser, Philipp ; Sadlo, Filip ; Glass, Colin W. ; Munz, Claus-Dieter ; Ertl, Thomas ; u. a.: Real-Gas Jet and Throttle Flows at High Pressure as Simplified Gas Injector Models with a Discontinuous Galerkin Method : Springer, 2016
  - BibTeX
  BibTeX
  @proceedings{fa30da4d16ee41e8857d243ef59de139, author = {Hempert, Fabian and Boblest, Sebastian and Hoffmann, Malte and Offenhäuser, Philipp and Sadlo, Filip and Glass, Colin W. and Munz, Claus-Dieter and Ertl, Thomas and Iben, Uwe}, privnote = {uid:2345}, publisher = {Springer}, title = {Real-Gas Jet and Throttle Flows at High Pressure as Simplified Gas Injector Models with a Discontinuous Galerkin Method}, year = 2016 }
11. Blom, David S. ; Ertl, Thomas ; Fernandes, Oliver ; Frey, Steffen ; Klimach, Harald ; Krupp, Verena ; Mehl, Miriam ; Roller, Sabine ; u. a.: Partitioned Fluid-Structure-Acoustics Interaction on Distributed Data. In: Springer (Hrsg.) ; Springer (Hrsg.): Software for Exascale Computing - SPPEXA 2013-2015, Software for Exascale Computing - SPPEXA 2013-2015. Bd. 113 : Springer International Publishing, 2016
  - BibTeX
  - Link
  BibTeX
  @inproceedings{3d1c918ee2ea4f9b9b3e77d469e1e799, author = {Blom, David S. and Ertl, Thomas and Fernandes, Oliver and Frey, Steffen and Klimach, Harald and Krupp, Verena and Mehl, Miriam and Roller, Sabine and Sternel, Dörte Carla and Uekermann, Benjamin and Winter, Tilo and Van Zuijlen, Alexander H.}, booktitle = {Software for Exascale Computing - SPPEXA 2013-2015}, editor = {Springer}, privnote = {uid:2320}, publisher = {Springer International Publishing}, title = {Partitioned Fluid-Structure-Acoustics Interaction on Distributed Data}, url = {http://dx.doi.org/10.1007/978-3-319-40528-5}, volume = 113, year = 2016 }
  Link
  http://dx.doi.org/10.1007/978-3-319-40528-5
12. Grottel, Sebastian ; Reina, Guido ; Krone, Michael ; Müller, Christoph ; Ertl, Thomas: MegaMol - for Fun and Profit. In: Workshop on Visualization in Practice, Workshop on Visualization in Practice, 2016
  - BibTeX
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  @inproceedings{grottel2016fun, author = {Grottel, Sebastian and Reina, Guido and Krone, Michael and Müller, Christoph and Ertl, Thomas}, booktitle = {Workshop on Visualization in Practice}, title = {MegaMol - for Fun and Profit}, year = 2016 }
13. Blascheck, Tanja ; Koch, Steffen ; Ertl, Thomas: Logging Interactions to Learn About Visual Data Coverage, 2016
  - BibTeX
  BibTeX
  @unpublished{e44871f8b3bc4dd8b83cb4008ea047c4, author = {Blascheck, Tanja and Koch, Steffen and Ertl, Thomas}, privnote = {uid:2326}, title = {Logging Interactions to Learn About Visual Data Coverage}, year = 2016 }
14. El-Assady, Mennatallah ; Gold, Valentin ; John, Markus ; Ertl, Thomas ; Keim, Daniel A.: Visual Text Analytics in Context of Digital Humanities. In: on Visualization, I. T. ; on Visualization for the Digital Humanities), C. G. (Workshop (Hrsg.) ; on Visualization, I. T. ; on Visualization for the Digital Humanities), C. G. (Workshop (Hrsg.): IEEE Transactions on Visualization and Computer Graphics (Workshop on Visualization for the Digital Humanities), IEEE Transactions on Visualization and Computer Graphics (Workshop on Visualization for the Digital Humanities). Bd. 2016 : IEEE Transactions on Visualization and Computer Graphics (Workshop on Visualization for the Digital Humanities), 2016
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  @inproceedings{d27a5e621ae04be5b50bd780ba429ecf, author = {El-Assady, Mennatallah and Gold, Valentin and John, Markus and Ertl, Thomas and Keim, Daniel A.}, booktitle = {IEEE Transactions on Visualization and Computer Graphics (Workshop on Visualization for the Digital Humanities)}, editor = {on Visualization, IEEE Transactions and on Visualization for the Digital Humanities), Computer Graphics (Workshop}, privnote = {uid:2375}, publisher = {IEEE Transactions on Visualization and Computer Graphics (Workshop on Visualization for the Digital Humanities)}, title = {Visual Text Analytics in Context of Digital Humanities}, volume = 2016, year = 2016 }
15. Bruder, Valentin ; Frey, Steffen ; Ertl, Thomas: Real-Time Performance Prediction and Tuning for Interactive Volume Raycasting. In: ACM (Hrsg.) ; ACM (Hrsg.): Proceedings of the SIGGRAPH Asia Symposium on Visualization, Proceedings of the SIGGRAPH Asia Symposium on Visualization. Bd. 2016 : ACM, 2016
  - BibTeX
  - Link
  BibTeX
  @inproceedings{edfbd63f8d65487a8f678ddc96292610, author = {Bruder, Valentin and Frey, Steffen and Ertl, Thomas}, booktitle = {Proceedings of the SIGGRAPH Asia Symposium on Visualization}, editor = {ACM}, number = 7, publisher = {ACM}, title = {Real-Time Performance Prediction and Tuning for Interactive Volume Raycasting}, url = {http://dx.doi.org/10.1145/3002151.3002156}, volume = 2016, year = 2016 }
  Link
  http://dx.doi.org/10.1145/3002151.3002156
16. Han, Qi ; Zhu, Weimeng ; Heimerl, Florian ; Koch, Steffen ; Ertl, Thomas: A Visual Approach for Interactive Co-Training. In: KDD 2016 Workshop on Interactive Data Exploration and Analytics, KDD 2016 Workshop on Interactive Data Exploration and Analytics. Bd. 2016 (2016)
  - BibTeX
  BibTeX
  @article{71647d0527eb48f9a9d792b49b13ea48, author = {Han, Qi and Zhu, Weimeng and Heimerl, Florian and Koch, Steffen and Ertl, Thomas}, journal = {KDD 2016 Workshop on Interactive Data Exploration and Analytics}, privnote = {uid:2338}, title = {A Visual Approach for Interactive Co-Training}, volume = 2016, year = 2016 }
17. Schatz, Karsten ; Müller, Christoph ; Krone, Michael ; Schneider, Jens ; Reina, Guido ; Ertl, Thomas: Interactive Visual Exploration of a Trillion Particles. In: IEEE (Hrsg.) ; IEEE (Hrsg.): Symposium on Large Data Analysis and Visualization (LDAV), Symposium on Large Data Analysis and Visualization (LDAV), 2016
  - BibTeX
  - Link
  BibTeX
  @inproceedings{SchatzLDAV2016, author = {Schatz, Karsten and Müller, Christoph and Krone, Michael and Schneider, Jens and Reina, Guido and Ertl, Thomas}, booktitle = {Symposium on Large Data Analysis and Visualization (LDAV)}, editor = {IEEE}, title = {Interactive Visual Exploration of a Trillion Particles}, url = {http://dx.doi.org/10.1109/LDAV.2016.7874310}, year = 2016 }
  Link
  http://dx.doi.org/10.1109/LDAV.2016.7874310
2015
1. Frey, Steffen ; Sadlo, Filip ; Ertl, Thomas: Balanced Sampling and Compression for Remote Visualization. In: Proceedings of the SIGGRAPH Asia Symposium on High Performance Computing, Proceedings of the SIGGRAPH Asia Symposium on High Performance Computing : ACM, 2015 — ISBN 978-1-4503-3929-2, S. 1–4
  - BibTeX
  - Link
  BibTeX
  @inproceedings{frey2015balanced, abstract = {We present a novel approach for handling sampling and compression in remote visualization in an integrative fashion. As adaptive sampling and compression share the same underlying concepts and criteria, the times spent for visualization and transfer can be balanced directly to optimize the image quality that can be achieved within a prescribed time window. Our dynamic adjustments regarding adaptive sampling, compression, and balancing, employ regression analysis-based error estimation which is carried out individually for each image block of a visualization frame. Our approach is tuned for high parallel efficiency in GPU-based remote visualization. We demonstrate its utility within a prototypical remote volume visualization pipeline by means of different datasets and configurations.}, author = {Frey, Steffen and Sadlo, Filip and Ertl, Thomas}, booktitle = {Proceedings of the SIGGRAPH Asia Symposium on High Performance Computing}, doi = {10.1145/2818517.2818529}, isbn = {978-1-4503-3929-2}, pages = {1-4}, publisher = {ACM}, title = {Balanced Sampling and Compression for Remote Visualization}, url = {https://doi.org/10.1145/2818517.2818529}, year = 2015 }
  Link
  https://doi.org/10.1145/2818517.2818529

Vita

English

German

Images

My Wikipedia page

Fields of Research

Visualization

Volume visualization
Flow visualization
Particle visualization
Life science applications
Visual Analytics

Computer Graphics

GPU based techniques
Web based graphics
Graphics for mobile devices
Graphics clusters
Non-photorealistic rendering

Human Computer Interfaces

User interfaces for the disabled
Navigation systems for the blind
Semantic web and visual queries
Web-based learning platforms
Augmented and virtual reality

Teaching and Supervision

Bibliometrics and Projects

My DBLP Entry
My Google Scholar Citations h-index: 70
I am on the Palsberg list of CS researchers
My MS academic search record
Publications web page of the institute (by year)
All VIS Projects are listed separately
All my Publications PDF (chronological until 2015)

Awards and Academies

Boards and Committees

Selection Committee of the DFG Heinz Maier-Leibnitz Prize (since 2021)
German Research Foundation (DFG) Review Board Computer Science 409-05 (2012-2020)
European Research Council Advanced Grant Panel Computer Science (2011-2015)
Eurographics Association Chairman (2011/12) and Executive Committee (2004-)
Conference Steering Committee IEEE Visualization (2004-11) (IEEE vgtc)
Conference Steering Committee IEEE VAST (2008-10) (IEEE vgtc)
Steering Group of the Eurographics Working Group on Data Visualization (2003-12)
Advisory Board of the Max Planck Center for Visual Computing and Communication (2004-07)
Scientific Advisory Board of the Zentrum für Virtual Reality und Visualisierung VRVis (2004-)
Chairman Scientific Advisory Board Welsh Research Institute of Visual Computing (2009-2013)
Scientific Advisory Board of the Wissenschaftscampus Tübingen (2011-2016)

Chairing and Editorship

Editor-in-Chief of the IEEE Transactions on Visualization and Computer Graphics (2007-2010)
Conference Co-Chair Pacific Graphics 2016
Papers Co-Chair Eurographics 2012
Symposium Co-Chair IEEE PacificVis 2011
Papers Co-Chair IEEE PacificVis 2009
Papers Co-Chair IEEE VAST 2008
Papers Co-Chair EuroVIS 2006
Workshop Co-Chair Volume Graphics 2005 and Volume Graphics 2006
Program Co-Chair IEEE/SIGGRAPH Symposium on Volume Visualization and Graphics 2004
Program Chair SIGGRAPH/Eurographics Graphics Hardware 2002
Co-Chair Dagstuhl Seminar â€œScientific Visualizationâ€ 2003 and 2005
Papers Co-Chair IEEE Visualization 2001
Papers Co-Chair IEEE Visualization 2000
Topic-Chair Volumetric Methods Eurographics 2003 and 2004
General Chair Vision, Modeling and Visualization 2001

Selected Program Committees

VIS 2021	EuroVis 2021	PacificVis 2021
SciVis 2020	EuroVis 2020	PacificVis 2020	Sibgrapi 2020
SciVis 2019	EuroVis 2019	PacificVis 2019	ChinaVis 2019
IEEE VAST 2016	Supercomputing 2015	SIGRAD 2015	SIBGRAPI 2016
EuroVis 2014	PacificVis 2014	SciVis 2013	VAST 2013
SIGGRAPH 2011	PacificGraphics 2011	LDAV 2011	SIBGRAPI 2011
EUROGRAPHICS 2007	EUROVIS 2007	EG PGV 2007	SIBGRAPI 2007
SIGGRAPH 2006	I3D 2006	WSCG 2006	Graphics Hardware 2006
WSCG 2006	SimVis 2006	EG PGV 2006	CGI 2006
SIGGRAPH 2005	I3D 2005	WSCG 2005	Graphics Hardware 2005
EuroVIS 2005	VMV 2005	SimVis 2005	EG VE 2005
IEEE VIS 2004	EG VisSym 2004	WSCG 2004	Graphics Hardware 2004
GI 2004	VMV 2004	SimVis 2004	GI-FG Spiele
Eurographics 2004	EG PGV 2004	GI-FG AR/VR

Reviewing

Besides the reviewing duties related to program committee obligations I am reviewer for various journals (e.g. IEEE, TVCG, EG CGF, IEEE CG&A, ACM TOG, C&G, TVC) and conferences.
I review proposals for the DFG, the Austrian FWF, the Canadian NSERC, the Britisch Royal Society, and the Swedish Research Council
I wrote letters of reference for about numerous faculty positions in Germany (Berufungsgutachten) and for many tenure track or full professor positions worldwide.

Recent Talks

University Service (in German)

Direktor Stuttgarter Zentrum für Simulationswissenschaften (SC SimTech) (2019-)
Sprecher Exzellenzcluster EXC 2075 „Data-Integrated Simulation Science“ (2019-)
Prorektor für Forschung und wissenschaftlichen Nachwuchs der Universität Stuttgart (2015-2018)
Dekan der Fakultät Informatik, Elektrotechnik und Informationstechnik (2013-2015)
Prodekan der Fakultät für Informatik, Elektrotechnik und Informationstechnik (2006-2010)
Mitglied des Forschungsrats (2013-2019)
Stellv. Direktor Stuttgart Research Center (Exzellenzcluster) SimTech (2007-2018)
Stellvertretender Sprecher des SFB 716 (2007-2018)
Mitglied des Senatsausschusses Forschung und Technologie (2006-2011)
Mitglied (stellv.) des Senatsausschusses Lehre (2005-2006)
Benutzerausschuss HLRS (2002-), RUS (2005-2007)
Sprecher des Institutsverbunds Informatik (2002-2003)
Geschäftsführender Direktor Institut für Informatik (2000-2002)
Vorsitzender Prüfungsausschuss Informatik und Softwaretechnik (2002-2006)
Vorsitzender und Mitglied unzähliger Berufungskommissionen

Thomas Ertl

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