Now showing items 269-288 of 762

    • Hardware Accelerated Wavelet Transformations 

      Hopf, Matthias; Ertl, Thomas (The Eurographics Association, 2000)
      Wavelets and related multiscale representations are important means for edge detection and processing as well as for segmentation and registration. Due to the computational complexity of these approaches no interactive ...
    • Hardware-accelerated Extraction and Rendering of Point Set Surfaces 

      Tejada, E.; Gois, J. P.; Nonato, L. G.; Castelo, A.; Ertl, T. (The Eurographics Association, 2006)
      Point-based models are gaining lately considerable attention as an alternative to traditional surface meshes. In this context, Point Set Surfaces (PSS) were proposed as a modeling and rendering method with important ...
    • Hardware-Accelerated Glyphs for Mono- and Dipoles in Molecular Dynamics Visualization 

      Reina, Guido; Ertl, Thomas (The Eurographics Association, 2005)
      We present a novel visualization method for mono- and dipolar molecular simulations from thermodynamics that takes advantage of modern graphics hardware to interactively render specifically tailored glyphs. Our approach ...
    • Hardware-accelerated Stippling of Surfaces derived from Medical Volume Data 

      Baer, Alexandra; Tietjen, Christian; Bade, Ragnar; Preim, Bernhard (The Eurographics Association, 2007)
      We present a fast hardware-accelerated stippling method which does not require any preprocessing for placing points on surfaces. The surfaces are automatically parameterized in order to apply stippling textures without ...
    • Hardware-Assisted Projected Tetrahedra 

      Maximo, André; Marroquim, Ricardo; Farias, Ricardo (The Eurographics Association and Blackwell Publishing Ltd., 2010)
      We present a flexible and highly efficient hardware-assisted volume renderer grounded on the original Projected Tetrahedra (PT) algorithm. Unlike recent similar approaches, our method is exclusively based on the rasterization ...
    • Hardware-assisted View-dependent Isosurface Extraction using Spherical Partition 

      Gao, Jinzhu; Shen, Han-Wei (The Eurographics Association, 2003)
      Extracting only the visible portion of an isosurface can improve both the computation efficiency and the rendering speed. However, the visibility test overhead can be quite high for large scale data sets. In this paper, ...
    • A Hardware-Assisted Visibility-Ordering Algorithm With Applications To Volume Rendering 

      Krishnan, Shankar; Silva, Cláudio T.; Wei, Bin (The Eurographics Association, 2001)
      We propose a hardware-assisted visibility ordering algorithm. From a given viewpoint, a (back-to-front) visibility ordering of a set of objects is a partial order on the objects such that if object A obstructs object B, ...
    • Hierarchical Data Representations Based on Planar Voronoi Diagrams 

      Schussman, Shirley; Bertram, Martin; Hamann, Bernd; Joy, Kenneth I. (The Eurographics Association, 2000)
      Multiresolution representation of high-dimensional scattered data is a fundamental problem in scientific visualization. This paper introduces a data hierarchy of Voronoi diagrams as a versatile solution. Given an arbitrary ...
    • Hierarchical Isosurface Segmentation Based on Discrete Curvature 

      Vivodtzev, Fabien; Linsen, Lars; Bonneau, Georges-Pierre; Hamann, Bernd; Joy, Kenneth I.; Olshausen, Bruno A. (The Eurographics Association, 2003)
      A high-level approach to describe the characteristics of a surface is to segment it into regions of uniform curvature behavior and construct an abstract representation given by a (topology) graph. We propose a surface ...
    • Hierarchical Stochastic Neighbor Embedding 

      Pezzotti, Nicola; Höllt, Thomas; Lelieveldt, Boudewijn P. F.; Eisemann, Elmar; Vilanova, Anna (The Eurographics Association and John Wiley & Sons Ltd., 2016)
      In recent years, dimensionality-reduction techniques have been developed and are widely used for hypothesis generation in Exploratory Data Analysis. However, these techniques are confronted with overcoming the trade-off ...
    • Hierarchical Vortex Regions in Swirling Flow 

      Petz, Christoph; Kasten, Jens; Prohaska, Steffen; Hege, Hans-Christian (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      We propose a new criterion to characterize hierarchical two-dimensional vortex regions induced by swirling motion. Central to the definition are closed loops that intersect the flow field at a constant angle. The union of ...
    • HiFiVE: A Hilbert Space Embedding of Fiber Variability Estimates for Uncertainty Modeling and Visualization 

      Schultz, Thomas; Schlaffke, Lara; Schölkopf, Bernhard; Schmidt-Wilcke, Tobias (The Eurographics Association and Blackwell Publishing Ltd., 2013)
      Obtaining reproducible fiber direction estimates from diffusion MRI is crucial for successful fiber tracking. Modeling and visualizing the probability distribution of the inferred fiber directions is an important step in ...
    • High-Quality Lighting and Efficient Pre-Integration for Volume Rendering 

      Lum, Eric B.; Wilson, Brett; Ma, Kwan-Liu (The Eurographics Association, 2004)
      Pre-integrated volume rendering is an effective technique for generating high-quality visualizations. The precomputed lookup tables used by this method are slow to compute and can not include truly pre-integrated lighting ...
    • High-Quality Rendering of Compressed Volume Data Formats 

      Fout, Nathaniel; Akiba, Hiroshi; Ma, Kwan-Liu; Lefohn, Aaron E.; Kniss, Joe (The Eurographics Association, 2005)
      Rendering directly from packed or compressed volume data formats using graphics hardware has advantages in terms of memory consumption and bandwidth, but results in lower-quality images due to the prohibitive cost of ...
    • High-Quality Volume Rendering with Resampling in the Frequency Domain 

      Artner, Martin; Möller, Torsten; Viola, Ivan; Gröller, Meister E. (The Eurographics Association, 2005)
      This work introduces a volume rendering technique that is conceptually based on the shear-warp factorization. We propose to perform the shear transformation in the frequency domain. Unlike the standard shear-warp algorithm, ...
    • High-Quality Volumetric Reconstruction on Optimal Lattices for Computed Tomography 

      Finkbeiner, Bernhard; Alim, Usman R.; Ville, Dimitri Van De; Möller, Torsten (The Eurographics Association and Blackwell Publishing Ltd., 2009)
      Within the context of emission tomography, we study volumetric reconstruction methods based on the Expectation Maximization (EM) algorithm. We show, for the first time, the equivalence of the standard implementation of the ...
    • How Ordered Is It? On the Perceptual Orderability of Visual Channels 

      Chung, David H. S.; Archambault, Daniel; Borgo, Rita; Edwards, Darren J.; Laramee, Robert S.; Chen, Min (The Eurographics Association and John Wiley & Sons Ltd., 2016)
      The design of effective glyphs for visualisation involves a number of different visual encodings. Since spatial position is usually already specified in advance, we must rely on other visual channels to convey additional ...
    • Hybrid Model for Vascular Tree Structures 

      Puig, Anna; Tost, Dani; Navazo, Isabel (The Eurographics Association, 2000)
      This paper proposes a new representation scheme of the cerebral blood vessels. This model provides information on the semantics of the vascular structure: the topological relationships between vessels and the labeling of ...
    • HyperMoVal: Interactive Visual Validation of Regression Models for Real-Time Simulation 

      Piringer, Harald; Berger, Wolfgang; Krasser, Jürgen (The Eurographics Association and Blackwell Publishing Ltd., 2010)
      Abstract During the development of car engines, regression models that are based on machine learning techniques are increasingly important for tasks which require a prediction of results in real-time. While the validation ...
    • The i-Disc - A Tool To Visualize and Explore Topic Maps 

      Hofmann, Tobias; Wendler, Hendrik; Froehlich, Bernd (The Eurographics Association, 2005)
      We present the i-Disc, a tool to interactively visualize and explore medium sized topic maps. Topic maps contain two basic structures: the topic hierarchy and the associations between topics. Our system presents the topic ...