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9th Forum Media Technology, FMT 2016 and 2nd All Around Audio Symposium 2016

作者： Silva, Nelson Shao, Lin Schreck, T. Eggeling, Eva Fellner, Dieter W. Institute for Computer Graphics and Knowledge Visualization Graz University of Technology Austria Fraunhofer Austria Research GmbH Austria Interactive Graphics Systems Group Technische Universitaet Darmstadt Fraunhofer IGD Germany

Effective visual exploration of large data sets is an important problem. A standard technique for mapping large data sets is to use hierarchical data representations (trees, or dendrograms) that users may navigate. If the data sets get large, so do the hierarchies, and e?ective methods for the navigation are required. Traditionally, users navigate visual representations using desktop interaction modalities, including mouse interaction. Motivated by recent availability of lowcost eye-tracker systems, we investigate application possibilities to use eye-tracking for controlling the visual-interactive data exploration process. We implemented a proof-ofconcept system for visual exploration of hierarchic data, exemplified by scatter plot diagrams which are to be explored for grouping and similarity relationships. The exploration includes usage of degree-of-interest based distortion controlled by user attention read from eye-movement behavior. We present the basic elements of our system, and give an illustrative use case discussion, outlining the application possibilities. We also identify interesting future developments based on the given data views and captured eye-tracking information. Copyright © 2016 by the paper's authors.

关键词： Eye tracking

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A soft union based method for virtual restoration and 3D printing of cultural heritage objects

A soft union based method for virtual restoration and 3D pri...

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2016 Eurographics Workshop on graphics and Cultural Heritage, GCH 2016

作者： Gregor, R. Mavridis, P. Wiltsche, A. Schreck, T. Graz University of Technology Institute of Computer Graphics and Knowledge Visualization Austria Graz University of Technology Institut für Architektur und Medien Austria

ISBN: (纸本)9783038680116

Recent improvements in 3D acquisition and shape processing methods lead to increased digitization of 3D Cultural Heritage (CH) objects. Beyond the mere digital archival of CH artifacts, there is an emerging research area dedicated to digital restoration of 3D Cultural Heritage artifacts. In particular several methods have been published recently that, from a digitized set of fragments, enable their reassembly or even the synthesis of missing or eroded parts. Usually the result of such methods is a set of aligned but disconnected parts. However, it is often desirable to produce a single, watertight mesh that can be easily 3D printed. We propose a method based on a volumetric soft union operation that can be used to combine such sets of aligned fragments to a single manifold mesh while producing smooth and plausible geometry at the seams. We assess its visual quality and efficiency in comparison to an adaption of the well-known Poisson Reconstruction method. Finally, we provide practical insights on printing the results produced by our method on digitized fragments of real CH objects. © 2016 The Author(s) Eurographics Proceedings © 2016 The Eurographics Association.

关键词： 3D printers

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From game events to team tactics: Visual analysis of dangerous situations in multi-match data

From game events to team tactics: Visual analysis of dangero...

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International Conference on Technology and Innovation in Sports, Health and Wellbeing (TISHW)

作者： Manuel Stein Halldór Janetzko Andreas Lamprecht Daniel Seebacher Tobias Schreck Daniel Keim Michael Grossniklaus Department of Computer and Information Science University of Konstanz Institute for Computer Graphics and Knowledge Visualization Graz University of Technology

ISBN: (纸本)9781509057283

Sport analytics in general and soccer analytics in particular constitute quickly growing markets when it comes to professional analyses and visualizations. From a data analysis research perspective, soccer is a rich source of geospatial and temporal movement data, with high details and a controlled environment. However, soccer movement is complex as its compounds are actions and reactions of two opposing teams with inverse goals. Common analyses performed today are typically oriented towards statistical analysis and considering aggregate measurements. In this work, we propose a set of effective visual-interactive methods for investigating set plays as a first step towards semi-automated analysis of tactic behavior. In our analytic design, we follow the so-called Information-seeking Mantra by Ben Shneiderman by providing overview visualizations, interactive refinements, and detailed analysis views. We take an applied approach in showing case studies that give evidence for the applicability and merits of our proposed techniques.

关键词： Data visualization visualization Technological innovation Games Data analysis Computational modeling Analytical models

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RDEPS: A combined Reaction-Diffusion Equation and Photometric Similarity filter for optical image restoration 12th

RDEPS: A combined Reaction-Diffusion Equation and Photometri...

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12th International Symposium on Visual Computing, ISVC 2016

作者： Zhao, Xueqing Mavridis, Pavlos Schreck, Tobias Kuijper, Arjan School of Computer Science Xi’an Polytechnic University Xi’an710048 China Institute for Computer Graphics and Knowledge Visualization Graz University of Technology Graz8010 Austria Fraunhofer IGD Darmstadt64283 Germany Technische Universität Darmstadt Darmstadt64289 Germany

ISBN: (纸本)9783319508313

Restoration of optical images degraded by atmospheric turbulence and various types of noise is still an open problem. In this paper, we propose an optical image restoration method based on a Reaction- Diffusion Equation and Photometric Similarity (RDEPS). We exploit photometric similarity and geometric closeness of the optical image by combining a photometric similarity function and a appropriately defined reaction-diffusion equation. Our resulting RDEPS filter is used to restore images degraded by atmospheric turbulence and noise, including Gaussian noise and impulse noise. Extensive experimental results show that our method outperforms other recently developed methods in terms of PSNR and SSIM. Moreover, the computational efficiency analysis shows that our RDEPS provides efficient restoration of optical images. © Springer International Publishing AG 2016.

关键词： Image reconstruction

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Procedural Modeling of Round Building Geometry

Procedural Modeling of Round Building Geometry

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International Conference on Cyberworlds

作者： Johannes Edelsbrunner Sven Havemann Alexei Sourin Dieter W. Fellner Institute for Computer Graphics and Knowledge Visualization (CGV) Graz University of Technology Graz Austria School of Computer Science and Engineering Nanyang Technological University Singapore Fraunhofer IGD TU Darmstadt Darmstadt Germany

Creation of procedural 3D building models can significantly lessen the costs of modeling, since it allows generating a variety of similar shapes from one procedural description. The common field of application for procedural modeling is modeling of straight building facades, which are very well suited for shape grammars – a special kind of procedural modeling system. In order to generate round building geometry, we present a way to setup different coordinate systems in shape grammars. Besides Cartesian, these are primarily cylindrical and spherical coordinate systems for generation of structures like towers or domes, that can procedurally adapt to different dimensions and parameters. The users can apply common splitting idioms from shape grammars in their familiar way, for creating round instead of straight geometry.

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3D object retrieval with parametric templates 8

3D object retrieval with parametric templates

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8th Eurographics Workshop on 3D Object Retrieval, 3DOR 2015

作者： Getto, Roman Fellner, Dieter W. Interactive Graphics Systems Group TU Darmstadt Germany Fraunhofer IGD Darmstadt Germany Institute of Computer Graphics and Knowledge Visualization TU Graz Austria

ISBN: (纸本)9783905674781

We propose a 3D object retrieval system which uses parametric templates as prior knowledge for the retrieval. A parametric template represents an object-domain and a semantic concept like 'chair' or 'plane' or a more specific concept like 'dining-char' or 'biplane'. The template can be specified at a general or specific level and can even equal actual retrieved objects. The parametric template is composed of several input parameters and an operation chain which constructs an object. Different parameter combinations lead to different object instances. We combine and evaluate a paramteric template with different descriptors. Our results show that the usage of parametric templates can raise the retrieval performance significantly. © The Eurographics Association 2015.

关键词： Semantics

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visualization of Biomolecular Structures: State of the Art 17

Visualization of Biomolecular Structures: State of the Art

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17th Eurographics Conference on visualization - State of the Art Reports, EuroVis-STAR 2015

作者： Kozlíková, B. Krone, M. Lindow, N. Falk, M. Baaden, M. Baum, D. Viola, I. Parulek, J. Hege, H.-C. Faculty of Informatics Masaryk University Czech Republic Visualization Research Center University of Stuttgart Germany Department of Visual Data Analysis Zuse Institute Berlin Germany Immersive Visualization Group Linköping University Sweden Laboratoire de Biochimie Théorique UPR 9080 CNRS France Department of Informatics University of Bergen Norway Institute of Computer Graphics and Algorithms Vienna University of Technology Austria

ISBN: (纸本)9783905674996

Structural properties of molecules are of primary concern in many fields. This report provides a comprehensive overview on techniques that have been developed in the fields of molecular graphics and visualization with a focus on applications in structural biology. The field heavily relies on computerized geometric and visual representations of three-dimensional, complex, large, and time-varying molecular structures. The report presents a taxonomy that demonstrates which areas of molecular visualization have already been extensively investigated and where the field is currently heading. It discusses visualizations for molecular structures, strategies for efficient display regarding image quality and frame rate, covers different aspects of level of detail, and reviews visualizations illustrating the dynamic aspects of molecular simulation data. The report concludes with an outlook on promising and important research topics to enable further success in advancing the knowledge about interaction of molecular structures. © The Eurographics Association 2015.

关键词： visualization

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Evaluation of guidance systems in public infrastructures using eye tracking in an immersive virtual environment 2

Evaluation of guidance systems in public infrastructures usi...

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2nd International Workshop on Eye Tracking for Spatial Research, ET4S 2014, Co-located with the 8th International Conference on Geographic Information Science, GIScience 2014

作者： Schrom-Feiertag, Helmut Schinko, Christoph Settgast, Volker Seer, Stefan Austrian Institute of Technology Vienna Austria Institute of Computer Graphics and Knowledge Visualization TU Graz Austria Fraunhofer Austria Graz Austria

In this paper we present a novel method to evaluate guidance systems and navigation solutions for public infrastructures based on an immersive virtual environment in combination with a mobile eye tracking system. It opens new opportunities for wayfinding studies in public infrastructures already during the planning phase. Our approach embeds an interface for natural locomotion in the virtual environment offering significant advantages related to the user's spatial perception as well as physical and cognitive demands. Accurate measurements of position, locomotion and gaze within the virtual environment enable a great simplification for the analysis of eye tracking data. We conducted a study with participants that included virtual and real world scenarios within a train station. First results exhibit similar behaviour of participants in the real and virtual environment, confirming the comparability and applicability of our method.

关键词： Eye tracking

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Procedural shape modeling in digital humanities: Potentials and issues

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8355卷 64-77页

作者： Havemann, Sven Wagener, Olaf Fellner, Dieter Institute of Computer Graphics and Knowledge Visualization Graz University of Technology Austria Fraunhofer IGD and TU Darmstadt Germany Institut fur Europaische Kunstgeschichte University of Heidelberg Germany

Procedural modeling is a technology that has great potential to make the abundant variety of shapes that have to be dealt with in Digital Humanities accessible and understandable. There is a gap, however, between technology on the one hand and the needs and requirements of the users in the Humanities community. In this paper we analyze the reasons for the limited uptake of procedural modeling and sketch possible ways to circumvent the problem. The key insight is that we have to find matching concepts in both fields, which are on the one hand grounded in the way shape is explained, e.g., in art history, but which can also be formalized to make them accessible to digital computers. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Image reconstruction

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Constructive Roof Geometry

Constructive Roof Geometry

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International Conference on Cyberworlds

作者： Johannes Edelsbrunner Ulrich Krispel Sven Havemann Alexei Sourin Dieter W. Fellner Institute for Computer Graphics and Knowledge Visualization (CGV) Graz University of Technology Graz Austria Fraunhofer Austria Research GmbH School of Computer Engineering Nanyang Technological University Singapore Graphisch-Interaktive System (GRIS) Darmstadt Germany Fraunhofer IGD TU Darmstadt Darmstadt Germany

While the growing demand for new building models contained in virtual worlds, games, and movies, makes the easy and fast creation of modifiable models more and more important, 3D modeling of buildings can be a tedious task due to their sometimes complex geometry. For historic buildings, especially the roofs can be challenging. We present a new method of combining simple building solids to form more complex buildings, and give an emphasis on the blending of roof faces. This can be integrated in common pipelines for procedural modeling of buildings and will bring more expressiveness than existing methods.

关键词： Buildings Solids Geometry Solid modeling Skeleton Three-dimensional displays Shape

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