Scientific Visualization Conference (dagstuhl '97)

9-13 June 1997

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Displaying Results 1 - 25 of 38
  • Preface

    Publication Year: 1997, Page(s): viii
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    Freely Available from IEEE
  • An Edge-Preserving, Data-Dependent Triangulation Scheme for Hierarchical Rendering

    Publication Year: 1997, Page(s): 1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (199 KB)

    In many applications one is concerned with the approximation of functions from a finite set of given data sites with associated function values. We describe a construction of a hierarchy of triangulations which approximate the given data at varying levels of detail. Intermediate triangulations can be associated with a particular level of the hierarchy by considering their approximation errors. Thi... View full abstract»

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  • A Hybrid Web-Based Toolkit for Human Modeling

    Publication Year: 1997, Page(s): 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (61 KB)

    Modern web-based Scientific Visualization applications try to overcome common limitations imposed by limited internet bandwidth, server bottlenecks or network latency. A further aspect is the desire to gain platform independence by solely using instruments which are platform independent by conception: the programming language Java, the Virtual Reality Modeling Language (VRML), or the 3D API Java3D... View full abstract»

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  • An Introduction to Wavelets for Scientific Visualization

    Publication Year: 1997, Page(s): 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (399 KB)

    This paper gives an introduction to wavelet techniques in the context of Scientific Visualization. Wavelets are a powerful tool for the representation of large and complex data sets. Some restrictions apply on the type of data sets which can be represented by wavelets. These restrictions are described in a first part. Thereafter, the basic concepts of wavelet representations are explained: level o... View full abstract»

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  • Visualization over the World Wide Web

    Publication Year: 1997, Page(s): 23
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (114 KB)

    The Web has grown from being a global information repository into a worldwide distributed computing environment. This offers the opportunity to carry out data visualization as a Web-based application. In this paper we look at the different players involved in the creation of a Web-based visualization service, and hence build a reference model for Web-based visualization. we then use this model to ... View full abstract»

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  • Simple, Fast, and Robust Ray Casting of Irregular Grids

    Publication Year: 1997, Page(s): 30
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    In this paper we describe a simple and efficient ray casting engine that is suitable for the rapid exploration of irregular grids composed of tetrahedra cells, or other cell complexes where cells have been broken up into faces. In our method, in a preprocessing phase, all the cells are broken into their corresponding faces. Visibility determination is performed after all the faces have been transf... View full abstract»

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  • An Integrated VR- and Simulation-Environment for Supporting the Complete Product Life Cycle of Space-Related Systems

    Publication Year: 1997, Page(s): 37
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    System development life cycles have been shortened within the last years using enhanced computer-based tools. Each life cycle of a system has been separated from later cycles of other systems except for the common knowledge of developers involved in different phases. To enhance the process of developing and bringing a product to the market from scratch we integrate available tools and information ... View full abstract»

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  • Spotting Structure in Complex Time Dependent Flow

    Publication Year: 1997, Page(s): 47
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (205 KB)

    Analyzing structure in complex time dependent flow fields is a challenging problem. This paper describes the use of spot noise for the visualization of this type of fields. Spot noise is a technique which utilizes texture for the visualization of flow fields. In this paper, two extensions of spot noise are discussed. These extensions allow spot noise to be used for detailed analysis of time depend... View full abstract»

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  • Multiresolutional Visualization of Evolving Distributed Simulations Using Wavelets and MPI

    Publication Year: 1997, Page(s): 54
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (102 KB)

    This paper presents a technique to losslessly compress and progressively transmit floating point data using wavelets. MPI (Message Passing Interface) is employed in the implementation of this technique so that the parallelized solver which runs in a remote computing environment and the visualization tool which runs on a local graphics workstation can communicate. View full abstract»

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  • Solid Fitting: Field Interval Analysis for Effective Volume Exploration

    Publication Year: 1997, Page(s): 65
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1275 KB)

    In previous reports, the concept of solid fitting has been presented as a new indirect approach to volume visualization. Solid fitting relies on a simple, but powerful geometric data model, termed interval volume, that allows one to represent a three-dimensional subvolume for which the associated scalar values lie within a specified closed interval. This paper combines the latest results obtained ... View full abstract»

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  • Visualization of Analytically Defined Dynamical Systems

    Publication Year: 1997, Page(s): 71
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (229 KB)

    The visualization of analytically defined dynamical systems is important for a thorough understanding of the underlying system behavior. An overview of theoretical concepts concerning analytically defined dynamical systems is given. Various visualization techniques for dynamical systems are discussed. Three current research directions concerning the visualization of dynamical systems are treated i... View full abstract»

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  • Wiener Splines

    Publication Year: 1997, Page(s): 83
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB)

    We describe an alternative way of constructing interpolating B-spline curves, surfaces or volumes in Fourier space which can be used for visualization. In our approach the interpolation problem is considered from a signal processing point of view and is reduced to finding an inverse B-spline filter sequence. The Fourier approach encompasses some advantageous features, such as successive approximat... View full abstract»

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  • Constrained Navigation Environments

    Publication Year: 1997, Page(s): 95
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (145 KB)

    Finding one's way through a complex virtual environment is a standard task in 3D graphics and virtual reality applications. Constrained navigation is a method that appropriately restricts the user's degrees of freedom when there is a poor match between the goal of an exploration activity, the control device, and the user's familiarity with the exploration domain. The fundamental prerequisite for t... View full abstract»

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  • Cluster-Based Generation of Hierarchical Surface Models

    Publication Year: 1997, Page(s): 105
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB)

    We present a highly efficient, automatic method for the generation of hierarchical surface triangulations. Given a set of scattered points in three-dimensional space, without known connectivity information, our method reconstructs a valid triangulated surface model in a two-step procedure. First, we apply clustering to the set of given points and identify point subsets in locally nearly planar reg... View full abstract»

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  • The VisAD Java Class Library for Scientific Data and Visualization

    Publication Year: 1997, Page(s): 115
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (30 KB)

    VisAD is a Java class library for interactive and collaborative visualization and analysis of numerical data. It is designed to support distributed computing and data sharing on the Internet through the use of distributed objects and a very general numerical data model. The data model integrates metadata for data organization, units, coordinate systems, sampling geometries and topoligies, missing ... View full abstract»

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  • Notes on Computational-Space-Based Ray-Casting for Curvilinear Volumes

    Publication Year: 1997, Page(s): 124
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (70 KB)

    In this paper we study the computational-space-based (C-space-based) ray-casting algorithm for rendering curvilinear volumes. With a simple counter example, we demonstrate that a proposed C-space-based method may not generate rendering results as accurately as ray-casting in the physical space. We also analyze what needs to be improved and discuss several other issues related to the C-space-based ... View full abstract»

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  • LIC For Surface Flow Feature Detection

    Publication Year: 1997, Page(s): 130
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (634 KB)

    The Line Integral Convolution (LIC) algorithm has received a lot of attention and interest. Yet, only a few of the current LIC related algorithms deal specifically with color textures for automatic detection of flow features. In this paper, I give a brief review of current work in this area. View full abstract»

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  • Ray-Based Data Level Comparisons of Direct Volume Rendering Algorithms

    Publication Year: 1997, Page(s): 137
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (225 KB)

    We present a new method for comparing direct volume rendering (DVR) algorithms. The motivations for this work are: the prevalence of DVR algorithms that produce slightly different images from the same data set and viewing parameters, and the limitations of existing image level comparison methods. In this paper, we describe and demonstrate the effectiveness of several ray-based metrics for data lev... View full abstract»

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  • Visualization of Complex Physical Phenomena and Mathematical Objects in Virtual Environment

    Publication Year: 1997, Page(s): 151
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3477 KB)

    In this paper we present a several topics in visualization and animation of topologically non-trivial objects: the open strings in 3D space; a process of un-coupling of 2 coupled handles on a sphere in 3D space by means of a homotopy in the class of embedding; the projective plane and the projective 3D space. Various properties of these objects are visualized: their non-orientability and non-trivi... View full abstract»

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  • Using Virtual Reality to Visualize Scientific, Engineering, and Medical Data

    Publication Year: 1997, Page(s): 161
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (146 KB)

    In this paper we briefly discuss the state of the art of Virtual Reality as applied to visualization of scientific and technical data sets. We describe the technologies and software for the creation of Virtual Environments. We also give an overview of some of the more significant and successful Virtual Reality applications in the fields of medicine, engineering, chemistry and computational fluid d... View full abstract»

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  • Fast and Accurate Collision Detection for Virtual Environments

    Publication Year: 1997, Page(s): 171
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (169 KB)

    A realistic simulation system, which couples geometry and physics, can provide a useful toolkit for virtual environments. Interactions among moving objects in the virtual worlds are modeled by dynamic constraints and contact analysis. In order to portray the geometric interaction in a dynamical system or to simulate physical behaviors of entities in the virtual environments, it is essential to per... View full abstract»

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  • Scattered Data Techniques for Surfaces

    Publication Year: 1997, Page(s): 181
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1615 KB)

    This survey presents several techniques for solving variants of the following scattered data interpolation problem: given a finite set of N points in R3, find a surface that interpolates the given set of points. Problems of this variety arise in numerous areas of applications such as geometric modeling and scientific visualization. A large class of solutions exists for these problems and many exce... View full abstract»

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  • Interpolation and Approximation of Surfaces from Three-Dimensional Scattered Data Points

    Publication Year: 1997, Page(s): 223
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (617 KB)

    There is a wide range of applications for which surface interpolation or approximation from scattered data points in space is important. Dependent on the field of application and the related properties of the data, many algorithms were developed in the past. This contribution gives a survey of existing algorithms, and identifies basic methods common to independently developed solutions. We disting... View full abstract»

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  • InVIS - Interactive Visualization of Medical Data Sets

    Publication Year: 1997, Page(s): 233
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (91 KB)

    Interactive rendering of large data sets requires efficient algorithms and accelerated graphics hardware. Both efficiency and speed can be improved, but none of these alone guarantees interactive response time. If a scene is too complex, performance decreases, and neither faster algorithms nor speeding up hardware can ensure interactive performance. This means that certain timing characteristics n... View full abstract»

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  • Surface Reconstruction - An Introduction

    Publication Year: 1997, Page(s): 239
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (42 KB)

    The goal of surface reconstruction is to find a surface from a given finite set of geometric sample values. In many applications, the sample values are points. But other types of samples, like curves occurring e.g. in tactile sampling by an adapted milling machine, or volume densities occurring for instance in X-ray based computer tomography, are also possible. We illuminate different aspects of t... View full abstract»

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