• Continuous Levels-of-Detail and Visual Abstraction for Seamless Molecular Visualization 

      Parulek, Julius; Jönsson, Daniel; Ropinski, Timo; Bruckner, Stefan; Ynnerman, Anders; Viola, Ivan (Peer reviewed; Journal article, 2014-05-06)
      Molecular visualization is often challenged with rendering of large molecular structures in real time. We introduce a novel approach that enables us to show even large protein complexes. Our method is based on the ...
    • Direct image-to-geometry registration using mobile sensor data 

      Kehl, Christian; Buckley, Simon John; Gawthorpe, Robert; Viola, Ivan; Howell, John Anthony (Peer reviewed; Journal article, 2016)
      Adding supplementary texture and 2D image-based annotations to 3D surface models is a useful next step for domain specialists to make use of photorealistic products of laser scanning and photogrammetry. This requires a ...
    • A Hierarchical Splitting Scheme to Reveal Insight into Highly Self-Occluded Integral Surfaces 

      Brambilla, Andrea; Viola, Ivan; Hauser, Helwig (Peer reviewed; Journal article, 2012)
      In flow visualization, integral surfaces are of particular interest for their ability to describe trajectories of massless particles. In areas of swirling motion, integral surfaces can become very complex and difficult to ...
    • Hybrid visibility compositing and masking for illustrative rendering 

      Bruckner, Stefan; Rautek, Peter; Viola, Ivan; Roberts, Mike; Sousa, Mario Costa; Gröller, M. Eduard (Peer reviewed; Journal article, 2010-08)
      In this paper, we introduce a novel framework for the compositing of interactively rendered 3D layers tailored to the needs of scientific illustration. Currently, traditional scientific illustrations are produced in a ...
    • Illustrative Flow Visualization: State of the Art, Trends and Challenges 

      Brambilla, Andrea; Carnecky, Robert; Peikert, Robert; Viola, Ivan; Hauser, Helwig (Peer reviewed; Journal article, 2012)
      Flow visualization is a well established branch of scientific visualization and it currently represents an invaluable resource to many fields, like automotive design, meteorology and medical imaging. Thanks to the capabilities ...
    • Interactively illustrating polymerization using three-level model fusion 

      Kolesar, Ivan; Parulek, Julius; Viola, Ivan; Bruckner, Stefan; Stavrum, Anne-Kristin; Hauser, Helwig (Peer reviewed; Journal article, 2014-10-14)
      Background: Research in cell biology is steadily contributing new knowledge about many aspects of physiological processes, both with respect to the involved molecular structures as well as their related function. Illustrations ...
    • Obscurance-based Volume Rendering Framework 

      Ruiz, Marc; Boada, Imma; Viola, Ivan; Bruckner, Stefan; Feixas, Miquel; Sbert, Mateu (Proceedings of Volume Graphics 2008., Conference object; Peer reviewed, 2008)
      lighting effects in a faster way than global illumination. Its application in volume visualization is of special interest since it permits us to generate a high quality rendering at a low cost. In this paper, we propose ...
    • Output-Sensitive Filtering of Streaming Volume Data 

      Šoltészová, Veronika; Birkeland, Åsmund; Stoppel, Sergej; Viola, Ivan; Bruckner, Stefan (Peer reviewed; Journal article, 2016-02)
      Real-time volume data acquisition poses substantial challenges for the traditional visualization pipeline where data enhancement is typically seen as a pre-processing step. In the case of 4D ultrasound data, for instance, ...
    • Perceptually Uniform Motion Space 

      Birkeland, Åsmund; Turkay, Cagatay; Viola, Ivan (Peer reviewed; Journal article, 2014-05-07)
      Flow data is often visualized by animated particles inserted into a flow field. The velocity of a particle on the screen is typically linearly scaled by the velocities in the data. However, the perception of velocity ...
    • Similarity-based Exploded Views 

      Ruiz, Marc; Viola, Ivan; Boada, Imma; Bruckner, Stefan; Feixas, Miquel; Sbert, Mateu (Lecture Notes in Computer Science; 5166, Chapter; Peer reviewed, 2008)
      Exploded views are often used in illustration to overcome the problem of occlusion when depicting complex structures. In this paper, we propose a volume visualization technique inspired by exploded views that partitions ...
    • Visual Cavity Analysis in Molecular Simulations 

      Parulek, Julius; Turkay, Cagatay; Reuter, Nathalie; Viola, Ivan (Peer reviewed; Journal article, 2013-11-12)
      Molecular surfaces provide a useful mean for analyzing interactions between biomolecules; such as identification and characterization of ligand binding sites to a host macromolecule. We present a novel technique, which ...
    • Visualization of Biomolecular Structures: State of the Art Revisited 

      Kozlíková, Barbora; Krone, Michael; Falk, Martin; Lindow, Norbert; Baaden, Marc; Baum, Daniel S.; Viola, Ivan; Parulek, Julius; Hege, Hans-Christian (Peer reviewed; Journal article, 2016-11-18)
      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 ...
    • The Vitruvian Baby: Interactive Reformation of Fetal Ultrasound Data to a T-Position 

      Mörth, Eric; Raidou, Renata Georgia; Viola, Ivan; Smit, Noeska Natasja (Conference object; Peer reviewed; Journal article, 2019)
      Three-dimensional (3D) ultrasound imaging and visualization is often used in medical diagnostics, especially in prenatal screening. Screening the development of the organs of the fetus as well as the overall growth is ...