Now showing items 1-20 of 33

    • Virtual Colon Flattening 

      Bartroli, A. Vilanova; R.Wegenkittl,; König, A.; Gröller, E.; Sorantin, E. (The Eurographics Association, 2001)
      We present a new method to visualize virtual endoscopic views. We propose to flatten the organ by the direct projection of the surface onto a set of cylinders. Two sampling strategies are presented and the introduced ...
    • Multiresolution Maximum Intensity Volume Rendering by Morphological Pyramids 

      Roerdink, Jos B.T.M. (The Eurographics Association, 2001)
      We propose a multiresolution representation for maximum intensity projection (MIP) volume rendering, based on morphological pyramids which allow progressive refinement and have the property of perfect reconstruction. The ...
    • Vector and Tensor Field Topology Simplification on Irregular Grids 

      Tricoche, Xavier; Scheuermann, Gerik; Hagen, Hans; Clauss, Stefan (The Eurographics Association, 2001)
      Topology-based visualization of planar turbulent flows results in visual clutter due to the presence of numerous features of very small scale. In this paper, we attack this problem with a topology simplification method for ...
    • Subdivision Surfaces for Scattered-data Approximation 

      Bertram, Martin; Hagen, Hans (The Eurographics Association, 2001)
      We propose a modified Loop subdivision surface scheme for the approximation of scattered data in the plane. Starting with a triangulated set of scattered data with associated function values, our scheme applies linear, ...
    • The Rendering of Unstructured Grids Revisited 

      Westermann, Rüdiger (The Eurographics Association, 2001)
      In this paper we propose a technique for resampling scalar fields given on unstructured tetrahedral grids. This technique takes advantage of hardware accelerated polygon rendering and 2D texture mapping and thus avoids any ...
    • Preserving the Mental Map using Foresighted Layout 

      Diel, Stepahn; Görg, Carsten; Kerren, Andreas (The Eurographics Association, 2001)
      First we introduce the concept of graph animations as a sequence of evolving graphs and a generic algorithm which computes a Foresighted Layout for dynamically drawing these graphs while preserving the mental map. The ...
    • Progressive View-Dependent Isosurface Propagation 

      Liu, Zhiyan; Finkelstein, Adam; Li, Kai (The Eurographics Association, 2001)
      This paper proposes a new isosurface extraction algorithm that extracts portions of the isosurface in a view-dependent manner by ray casting and propagation. The algorithm casts rays through a volume to find visible active ...
    • A Case Study in Multi-Sensory Investigation of Geoscientific Data 

      Harding, Chris; Kakadiaris, Ioannis A.; Casey, John F.; Loftin, R. Bowen (The Eurographics Association, 2001)
      In this paper, we report our ongoing research into multi-sensory investigation of geoscientific data. Our Geoscientific Data Investigation System (GDIS) integrates three-dimensional, interactive computer graphics, touch ...
    • Visualization of Generalized Voronoi Diagrams 

      Telea, Alexandru; Wijk, Jarke J. van (The Eurographics Association, 2001)
      Voronoi diagrams are an important data structure in computer science. However well studied mathematically, understanding such diagrams for different metrics, orders, and site shapes is a complex task. We propose a new ...
    • Comparative Visualization of Instabilities in Crash-Worthiness Simulations 

      Sommer, Ove; Ertl, Thomas (The Eurographics Association, 2001)
      Since crash-worthiness simulations get more and more important as part of the car development process in order to reduce the cost of development, enhance the product quality, and minimize the time-to-market, the reliability ...
    • I/O-Conscious Volume Rendering 

      Yang, Chuan-Kai; Chiueh, Tzi-cker (The Eurographics Association, 2001)
      Most existing volume rendering algorithms assume that data sets are memory-resident and thus ignore the performance overhead of disk I/O. While this assumption may be true for high-performance graphics machines, it does ...
    • Extraction of Crack-free Isosurfaces from Adaptive Mesh Refinement Data 

      Weber, Gunther H.; Kreylos, Oliver; Ligocki, Terry J.; Shalf, John M.; Hagen, Hans; Hamann, Bernd; Joy, Kenneth I. (The Eurographics Association, 2001)
      Adaptive mesh refinement (AMR) is a numerical simulation technique used in computational fluid dynamics (CFD). It permits the efficient simulation of phenomena characterized by substantially varying scales in complexity ...
    • Improved visualization in virtual colonoscopy using image-based rendering 

      Serlie, Iwo; Vos, Frans; Gelder, Rogier van; Stoker, Jaap; Truyen, Roel; Gerritsen, Frans; Nio, Yung; Post, Frits (The Eurographics Association, 2001)
      Virtual colonoscopy (VC) is a patient-friendly alternative for colorectal endoscopic examination. We explore visualization aspects of VC such as surface in view, navigation and communication of a diagnosis. A series of ...
    • Three-dimensional Reconstruction and Visualization of the Cerebral Cortex in Primates 

      Demelio, Sergio; Bettio, Fabio; Gobbetti, Enrico; Luppino, Giuseppe (The Eurographics Association, 2001)
      We present a prototype interactive application for the direct analysis in three dimensions of the cerebral cortex in primates. The paper provides an overview of the current prototype system and presents the techniques used ...
    • Case Study: Visualization and Information Retrieval Techniques for Network Intrusion Detection 

      Atkison, Travis; Pensy, Kathleen; Nicholas, Charles; Ebert, David; Atkison, Rebekah; Morris, Chris (The Eurographics Association, 2001)
      We describe our efforts to analyze network intrusion detection data using information retrieval and visualization tools. By regarding Telnet sessions as documents, which may or may not include attacks, a session that ...
    • Visualization of directed associations in e-commerce transaction data 

      Hao, Ming C.; Dayal, Umeshwar; Hsu, Meichun; Sprenger, Thomas; Gross, Markus H. (The Eurographics Association, 2001)
      Many real-world e-commerce applications require the mining of large volumes of transaction data to extract marketing and sales information. This paper describes the Directed Association Visualization (DAV) system that ...
    • 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, ...
    • Volume Rendering Data with Uncertainty Information 

      Djurcilov, Suzana; Kim, Kwansik; Lermusiaux, Pierre F. J.; Pang, Alex (The Eurographics Association, 2001)
      This paper explores two general methods for incorporating volumetric uncertainty information in direct volume rendering. The goal is to produce volume rendered images that depict regions of high (or low) uncertainty in the ...
    • Interactive and Multi-modal Visualization for Neuroendoscopic Interventions 

      Bartz, Dirk; Straßer, Wolfgang; Gürvit, Özlem; Freudenstein, Dirk; Skalej, Martin (The Eurographics Association, 2001)
      Based on the VIVENDI-framework for virtual endoscopy, we present a system for the interactive and multi-modal representation of important anatomical structures for neuroendoscopic interventions. A serious problem of ...
    • Salient Representation of Volume Data 

      Hladuvka, Jiri; König, Andreas; Gröller, Eduard (The Eurographics Association, 2001)
      We introduce a novel method for identification of objects of interest in volume data. Our approach conveys the information contained in two essentially different concepts, the object s boundaries and the narrow solid ...