EuroRVVV13

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https://diglib.eg.org/handle/10.2312/981

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Browsing EuroRVVV13 by Title

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    Gaze into Hierarchy: A Practice-oriented Eye Tracking Study
    (The Eurographics Association, 2013) Müller, N. H.; Liebold, B.; Pietschmann, D.; Ohler, P.; Rosenthal, P.; P. Rosenthal and R. S. Laramee and M. Kirby and G. L. Kindlmann
    The visualization of hierarchical data is a wide field and plenty of different approaches have been proposed for various applications and purposes. A comprehensive survey on hierarchy visualizations was recently presented by Schulz et al. [SHS11]. Although every approach has its own claimed advantages, for practitioners it is often unclear what these mean in the specific context and which method to use.
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    A Study Of Discretization Errors In Volume Rendering Integral Approximations
    (The Eurographics Association, 2013) Etiene, Tiago; Kirby, Robert M.; Silva, Cláudio T.; P. Rosenthal and R. S. Laramee and M. Kirby and G. L. Kindlmann
    We present a study of the influence of different approximation schemes on the convergence rate of volume rendering integral (VRI) numerical approximations. We experimentally evaluate the impact of numerical integration techniques on the rate of convergence to the correct solution of the VRI on a single ray.We report that the discretization of both the inner and outer integrals have influence on the overall convergence rate. Then, we present results related to the (traditional) pre-integrated and second-order pre-integrated algorithms. In practice, we observed that pre-integrated lookup tables provide second and third order convergence rates for the VRI approximation, respectively. Our results also suggest that the convergence rate drops one order of magnitude for the second-order algorithm when lookup tables are numerically computed using low sample rates. Also, the convergence of both algorithms drops to linear when the attenuation within ray segment is neglected.
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    A Survey on Visualization in Industrial Ergonomics
    (The Eurographics Association, 2013) Heft, W.; Spitzhirn, M.; Rosenthal, P.; P. Rosenthal and R. S. Laramee and M. Kirby and G. L. Kindlmann
    The field of ergonomics is widely used in industry and other fields close to human work. This paper presents an overview about the state of the art in virtual ergonomics with regard to visualization issues. We consider some of the most popular ergonomics tools and their analysis functions like visibility and accessibility of objects or the ergonomic stress of specific extremities. Advantages and disadvantages are discussed with respect to aspects of intuitive and reliable information display.
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    Using User-Centered Techniques for the Design and Evaluation of Interactive Visualizations to Support Urban and Regional Planning: Case Study Bogota 21
    (The Eurographics Association, 2013) Prieto, D. Fernandez; Zeckzer, D.; Hernández, J. T.; P. Rosenthal and R. S. Laramee and M. Kirby and G. L. Kindlmann
    User-centered techniques and evaluations are very important for the design of interactive visualizations. We applied the UCIV4 Planning Approach (User-Centered Interactive Visualizations for Planning) within the project ''Bogotá 21''. This approach proposes three activities that aim at gathering information about users and perform early evaluations as part of the end of each phase of the process. This paper presents the lessons learned from applying this user-centered approach to the ''Bogotá 21'' project and provides recommendations for improving future instantiations of this and approach and the included evaluations.