VRVis Forschungs GmbH

Vienna, Austria

VRVis Forschungs GmbH

Vienna, Austria
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Agfa Healthcare Nv, VRVis Forschungs GmbH, AVL List GmbH and Imp Forschungsinstitut Fur Molekulare Pathologie Gmbh | Date: 2013-07-23

A method, an apparatus, and a system label one or more parts of a spine in an image, in particular a computed tomography (CT) image, of a human or animal body, and in order to achieve a reliable spine labeling and a high throughput of images, match a model of a spine segment with segments of the spine in the image by starting matching the model of a spine segment with an initial segment of the spine in the image, wherein the initial segment of the spine in the image is located at an initial position along the spine in the image, and continue to match the model of a spine segment with one or more further segments of the spine in the image, wherein the further segments of the spine in the image are located at positions farther along the spine in the image.


Ribicic H.,VRVis Forschungs GmbH | Waser J.,VRVis Forschungs GmbH | Fuchs R.,ETH Zurich | Bloschl G.,Vienna University of Technology | Groller E.,Institute For Computergraphik Und Algorithmen
IEEE Transactions on Visualization and Computer Graphics | Year: 2013

We present a visualization tool for the real-time analysis of interactively steered ensemble-simulation runs, and apply it to flooding simulations. Simulations are performed on-the-fly, generating large quantities of data. The user wants to make sense of the data as it is created. The tool facilitates understanding of what happens in all scenarios, where important events occur, and how simulation runs are related. We combine different approaches to achieve this goal. To maintain an overview, data are aggregated and embedded into the simulation rendering, showing trends, outliers, and robustness. For a detailed view, we use information-visualization views and interactive visual analysis techniques. A selection mechanism connects the two approaches. Points of interest are selected by clicking on aggregates, supplying data for visual analysis. This allows the user to maintain an overview of the ensemble and perform analysis even as new data are supplied through simulation steering. Unexpected or unwanted developments are detected easily, and the user can focus the exploration on them. The solution was evaluated with two case studies focusing on placing and testing flood defense measures. Both were evaluated by a consortium of flood simulation and defense experts, who found the system to be both intuitive and relevant. © 1995-2012 IEEE.


Reichinger A.,VRVis Forschungs GmbH | Maierhofer S.,VRVis Forschungs GmbH | Purgathofer W.,Vienna University of Technology
Journal of Computing and Cultural Heritage | Year: 2011

The aim of this work is to bring the cultural heritage of two-dimensional art closer to being accessible by blind and visually impaired people. We present a computer-assisted workflow for the creation of tactile representations of paintings, suitable to be used as a learning tool in the context of guided tours in museums or galleries. Starting from high-resolution images of original paintings, our process allows an artist to quickly design the desired form, and generate data suitable for rapid prototyping machines to produce the physical touch tools. Laser-cut layered depth diagrams convey not only the individual objects in the painting and their spatial layout, but also augment their depth relations. CNC-milled textured reliefs additionally render fine details like brush strokes and texture suitable for the sense of touch. Our methods mimic aspects of the visual sense, make sure that the haptic output is quite faithful to the original paintings, and do not require special manual abilities like sculpting skills. © 2011 ACM.


Neumuller M.,Artecontacto Kunstvermittlung | Reichinger A.,VRVis Forschungs GmbH | Rist F.,Vienna University of Technology | Kern C.,Vienna University of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

Additive manufacturing, if seconded by a paradigm change to the museum model, can be employed in many ways to reintegrate touch, and other non-retinal senses into our cultural experiences. These multi-sensorial forms of experiencing culture also have a great benefit for the accessibility of cultural heritage, especially for persons with learning difficulties, for children, the elderly, for blind or visually impaired visitors. 3D Printing is in a phase of rapid technological changes and promises more enhancing experiences for the field of cultural heritage. This would provide a more holistic appreciation of the produced objects, but make it necessary to develop basic guidelines for 3D printed models. We expect that 3D Printing will not only become vital in the field of reconstruction of objects, but also for research, documentation, preservation and educational purposes, and it has the potential to serve these purposes in an accessible and all-inclusive way. © Springer-Verlag Berlin Heidelberg 2014.


Reichinger A.,VRVis Forschungs GmbH | Majdak P.,Austrian Academy of Sciences | Sablatnig R.,Vienna University of Technology | Maierhofer S.,VRVis Forschungs GmbH
Proceedings - 2013 International Conference on 3D Vision, 3DV 2013 | Year: 2013

In the context of computational acoustics, a detailed evaluation of various 3-D scanning methods for the purpose of capturing the geometry of the human pinna (the visible part of the ear) is presented. Over 80 full 3-D scans of the head and ears of three subjects were performed with six different 3-D scanning methods, including photogrammetry with nine different camera and texturing options. We provide a numerical comparison of the scanning performance in terms of accuracy and completeness, and show the effect of ambient occlusion on the accuracy. The numerical and practical issues for scanning the ears for computational acoustics are discussed. © 2013 IEEE.


Eibner G.,VRVis Forschungs GmbH | Fuhrmann A.,VRVis Forschungs GmbH | Purgathofer W.,Vienna University of Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

We propose a GPU-based algorithm for texture analysis and synthesis of nearly-regular patterns, in our case scanned textiles or similar manufactured surfaces. The method takes advantage of the highly parallel execution on the GPU to generate correlation maps from captured template images. In an analysis step a lattice encoding the periodicity of the texture is computed. This lattice is used to synthesize the smallest texture tile describing the underlying pattern. Compared to other approaches, our method analyzes and synthesizes a valid lattice model without any user interaction. It is robust against small distortions and fast compared to other, more general approaches. © 2012 Springer-Verlag.


Schindler B.,Universitatstrasse 6 | Waser J.,VRVis Forschungs GmbH | Ribicic H.,VRVis Forschungs GmbH | Fuchs R.,Universitatstrasse 6 | Peikert R.,Universitatstrasse 6
IEEE Transactions on Visualization and Computer Graphics | Year: 2013

In this paper, we present a data-flow system which supports comparative analysis of time-dependent data and interactive simulation steering. The system creates data on-the-fly to allow for the exploration of different parameters and the investigation of multiple scenarios. Existing data-flow architectures provide no generic approach to handle modules that perform complex temporal processing such as particle tracing or statistical analysis over time. Moreover, there is no solution to create and manage module data, which is associated with alternative scenarios. Our solution is based on generic data-flow algorithms to automate this process, enabling elaborate data-flow procedures, such as simulation, temporal integration or data aggregation over many time steps in many worlds. To hide the complexity from the user, we extend the World Lines interaction techniques to control the novel data-flow architecture. The concept of multiple, special-purpose cursors is introduced to let users intuitively navigate through time and alternative scenarios. Users specify only what they want to see, the decision which data are required is handled automatically. The concepts are explained by taking the example of the simulation and analysis of material transport in levee-breach scenarios. To strengthen the general applicability, we demonstrate the investigation of vortices in an offline-simulated dam-break data set. © 1995-2012 IEEE.


Schulze F.,VRVis Forschungs GmbH | Trapp M.,VRVis Forschungs GmbH | Buhler K.,VRVis Forschungs GmbH | Liu T.,Institute of Molecular Pathology | Dickson B.,Institute of Molecular Pathology
Eurographics Workshop on 3D Object Retrieval, EG 3DOR | Year: 2012

Circuit Neuroscience tries to solve one of the most challenging questions in biology: How does the brain work? An important step towards an answer to this question is to gather detailed knowledge about the neuronal circuits of the model organism Drosophila melanogaster. Geometric representations of neuronal objects of the Drosophila are acquired using molecular genetic methods, confocal microscopy, non-rigid registration and segmentation. These objects are integrated into a constantly growing common atlas. The comparison of new segmented neurons to already known neurons is a frequent task which evolves with a growing amount of data into a bottleneck of the knowledge discovery process. Thus, the exploration of the atlas by means of domain specific similarity measures becomes a pressing need. To enable similarity based retrieval of neuronal objects we defined together with domain experts tailored dissimilarity measures for each of the three typical neuronal sub structures cell body, projection, arborization. The dissimilarity measure for composite neurons has been defined as domain specific combination of the sub structure dissimilarities. According to domain experts the developed system has big advantages for all tasks which involve extensive data exploration. © The Eurographics Association 2012.


Trapp M.,VRVis Forschungs GmbH | Schulze F.,VRVis Forschungs GmbH | Buhler K.,VRVis Forschungs GmbH | Liu T.,Institute of Molecular Pathology | Dickson B.J.,Institute of Molecular Pathology
Visual Computer | Year: 2013

Circuit neuroscience tries to solve one of the most challenging questions in biology: How does the brain work? An important step toward an answer to this question is to gather detailed knowledge about the neuronal circuits of the model organism Drosophila melanogaster. Geometric representations of neuronal objects of the Drosophila are acquired using molecular genetic methods, confocal microscopy, nonrigid registration and segmentation. These objects are integrated into a constantly growing common atlas. The comparison of new segmented neuronal objects to already known neuronal structures is a frequent task, which evolves with a growing amount of data into a bottleneck of the knowledge discovery process. Thus, the exploration of the atlas by means of domain specific similarity measures becomes a pressing need. To enable similarity based retrieval of neuronal objects, we defined together with domain experts tailored dissimilarity measures for each of the three typical neuronal structures cell body, projection, and arborization. Moreover, we defined the neuron enhanced similarity for projections and arborizations. According to domain experts, the developed system has big advantages for all tasks, which involve extensive data exploration. © 2013 Springer-Verlag Berlin Heidelberg.


Reichinger A.,VRVis Forschungs GmbH | Neumuller M.,VRVis Forschungs GmbH | Rist F.,VRVis Forschungs GmbH | Maierhofer S.,VRVis Forschungs GmbH | Purgathofer W.,VRVis Forschungs GmbH
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

Computer-aided tools offer great potential for the design and production of tactile models. While many publications focus on the design of essentially two-dimensional media like raised line drawings or the reproduction of three-dimensional objects, we intend to broaden this view by introducing a taxonomy that classifies the full range of conversion possibilities based on dimensionality. We present an overview of current methods, discuss specific advantages and difficulties, identify suitable programs and algorithms and discuss personal experiences from case studies performed in cooperation with two museums. © 2012 Springer-Verlag.

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