Visualization, 1994., Visualization '94, Proceedings., IEEE Conference on

21-21 Oct. 1994

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  • Proceedings Visualization '94

    Publication Year: 1994
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  • Validation, verification and evaluation

    Publication Year: 1994, Page(s):414 - 418
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (420 KB)

    A discussion is given on the validation, verification and evaluation of scientific visualization software. A “bug” usually refers to software doing something different than the programmer intended. Comprehensive testing, especially for software intended for use in innovative environments, is hard. Descriptions and summaries of the tests we have done are often not available to the users... View full abstract»

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  • A library for visualizing combinatorial structures

    Publication Year: 1994, Page(s):164 - 171, CP18
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (628 KB)

    Describes ANIM3D, a 3D animation library targeted at visualizing combinatorial structures. In particular, we are interested in algorithm animation. Constructing a new view for an algorithm typically takes dozens of design iterations, and can be very time-consuming. Our library eases the programmer's burden by providing high-level constructs for performing animations, and by offering an interpretiv... View full abstract»

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  • Approximation of isosurface in the Marching Cube: ambiguity problem

    Publication Year: 1994, Page(s):288 - 292
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (300 KB)

    The purpose of the article is the consideration of the problem of ambiguity over the faces arising in the Marching Cube algorithm. The article shows that for unambiguous choice of the sequence of the points of intersection of the isosurface with edges confining the face it is sufficient to sort them along one of the coordinates. It also presents the solution of this problem inside the cube. Graph ... View full abstract»

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  • Visualizing flow over curvilinear grid surfaces using line integral convolution

    Publication Year: 1994, Page(s):240 - 247, CP27
    Cited by:  Papers (28)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (756 KB)

    Line integral convolution (LIC), introduced by B. Cabral and C. Leedom (1993), is a powerful technique for imaging and animating vector fields. We extend the LIC paradigm in three ways: the existing technique is limited to vector fields over a regular Cartesian grid and we extend it to vector fields over parametric surfaces, specifically those found in curvilinear grids, used in computational flui... View full abstract»

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  • Visualization and geographic information system integration: what are the needs and the requirements, if any?

    Publication Year: 1994, Page(s):400 - 403
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (396 KB)

    Addresses the needs and requirements of integrating visualization and geographic information system technologies. There are three levels of integration methods: rudimentary, operational and functional. The rudimentary approach uses the minimum amount of data sharing and exchange between these two technologies. The operational level attempts to provide consistency of the data while removing redunda... View full abstract»

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  • The topology of symmetric, second-order tensor fields

    Publication Year: 1994, Page(s):140 - 147, CP15
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (752 KB)

    We study the topology of symmetric, second-order tensor fields. The goal is to represent their complex structure by a simple set of carefully chosen points and lines analogous to vector field topology. We extract topological skeletons of the eigenvector fields, and we track their evolution over time. We study tensor topological transitions and correlate tensor and vector data. The basic constituen... View full abstract»

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  • Strata-various: multi-layer visualization of dynamics in software system behavior

    Publication Year: 1994, Page(s):172 - 178, CP19
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (572 KB)

    Current software visualization tools are inadequate for understanding, debugging, and tuning realistically complex applications. These tools often present only static structure, or they present dynamics from only a few of the many layers of a program and its underlying system. This paper introduces “PV”, a prototype program visualization system which provides concurrent visual presenta... View full abstract»

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  • Visualizing polycrystalline orientation microstructures with spherical color maps

    Publication Year: 1994, Page(s):46 - 51, CP5
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (704 KB)

    Spherical color maps can be an effective tool in the microstructure visualization of polycrystals. Electron backscatter diffraction pattern analysis provides large arrays of the orientation data that can be visualized easily using the technique described in this paper. A combination of this technique with the traditional black and white scanning electron microscopy imaging will enable scientists t... View full abstract»

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  • Isosurface generation by using extrema graphs

    Publication Year: 1994, Page(s):77 - 83, CP7
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (464 KB)

    A high-performance algorithm for generating isosurfaces is presented. In this algorithm, extrema points in a scalar field are first extracted. A graph is then generated in which the extrema points are taken as nodes. Each arc of the graph has a list of IDs of the cells that are intersected by the arc. A boundary cell list ordered according to cells' values is also generated. The graph and the list... View full abstract»

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  • Nonpolygonal isosurface rendering for large volume datasets

    Publication Year: 1994, Page(s):293 - 300, CP33
    Cited by:  Papers (2)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (800 KB)

    Surface-based rendering techniques, particularly those that extract a polygonal approximation of an isosurface, are widely used in volume visualization. As dataset size increases though, the computational demands of these methods can overwhelm typically available computing resources. Recent work on accelerating such techniques has focused on preprocessing the volume data or postprocessing the extr... View full abstract»

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  • Visualizing 3D velocity fields near contour surfaces

    Publication Year: 1994, Page(s):248 - 255, CP28
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (900 KB)

    Vector field rendering is difficult in 3D because the vector icons overlap and hide each other. We propose four different techniques for visualizing vector fields only near surfaces. The first uses motion blurred particles in a thickened region around the surface. The second uses a voxel grid to contain integral curves of the vector field. The third uses many antialiased lines through the surface,... View full abstract»

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  • GASP-a system for visualizing geometric algorithms

    Publication Year: 1994, Page(s):149 - 155, CP16
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (640 KB)

    This paper describes a system, GASP, that facilitates the visualization of geometric algorithms. The user need not have any knowledge of computer graphics in order to quickly generate a visualization. The system is also intended to facilitate the task of implementing and debugging geometric algorithms. The viewer is provided with a comfortable user interface enhancing the exploration of an algorit... View full abstract»

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  • Streamball techniques for flow visualization

    Publication Year: 1994, Page(s):225 - 231, CP25
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (456 KB)

    We introduce the concept of streamballs for flow visualization. Streamballs are based upon implicit surface generation techniques adopted from the well-known metaballs. Their property to split or merge automatically in areas of significant divergence or convergence makes them an ideal tool for the visualization of arbitrary complex fields. Using convolution surfaces generated by continuous skeleto... View full abstract»

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  • Restorer: a visualization technique for handling missing data

    Publication Year: 1994, Page(s):212 - 216, CP23
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (360 KB)

    Pseudocoloring is a frequently used technique in scientific visualization for mapping a color to a data value. When using pseudocolor and animation to visualize data that contain missing regions displayed as black or transparent, the missing regions popping in and out can distract the viewer from the more relevant information. Filling these gaps with interpolated data could lead to a misinterpreta... View full abstract»

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  • Parallel performance measures for volume ray casting

    Publication Year: 1994, Page(s):196 - 203
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (620 KB)

    Describes a technique for achieving fast volume ray-casting on parallel machines, using a load-balancing scheme and an efficient pipelined approach to compositing. We propose a new model for measuring the amount of work one needs to perform in order to render a given volume, and we use this model to obtain a better load-balancing scheme for distributed memory machines. We also discuss in detail th... View full abstract»

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  • Differential volume rendering: a fast volume visualization technique for flow animation

    Publication Year: 1994, Page(s):180 - 187, CP20
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (640 KB)

    We present a direct volume rendering algorithm to speed up volume animation for flow visualizations. Data coherency between consecutive simulation time steps is used to avoid casting rays from those pixels retaining color values assigned to the previous image. The algorithm calculates the differential information among a sequence of 3D volumetric simulation data. At each time step the differential... View full abstract»

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  • A distributed, parallel, interactive volume rendering package

    Publication Year: 1994, Page(s):21 - 30, CP2
    Cited by:  Papers (9)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (632 KB)

    This paper presents a parallel ray-casting volume rendering algorithm and its implementation on the massively parallel IBM SP-1 computer using the Chameleon message passing library. Though this algorithm takes advantage of many of the unique features of the SP-1 (e.g. high-speed switch, large memory per node, high-speed disk array, HIPPI display, et al.), the use of Chameleon allows the code to be... View full abstract»

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  • Introducing alpha shapes for the analysis of path integral Monte Carlo results

    Publication Year: 1994, Page(s):52 - 59
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (692 KB)

    We present a new technique for the visualization and analysis of the results from Monte Carlo simulations based on α-complexes and α-shapes. The specific application presented is the analysis of the quantum-mechanical behavior of hydrogen molecules and helium atoms on a surface at very low temperatures. The technique is an improvement over existing techniques in two respects. First, th... View full abstract»

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  • Wavelet-based volume morphing

    Publication Year: 1994, Page(s):85 - 92, CP8
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (552 KB)

    This paper presents a technique for performing volume morphing between two volumetric datasets in the wavelet domain. The idea is to decompose the volumetric datasets into a set of frequency bands, apply smooth interpolation to each band, and reconstruct to form the morphed model. In addition, a technique for establishing a suitable correspondence among object voxels is presented. The combination ... View full abstract»

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  • Mix&Match: a construction kit for visualization

    Publication Year: 1994, Page(s):302 - 309, CP34
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (712 KB)

    We present an environment in which users can interactively create different visualization methods. This modular and extensible environment encapsulates most of the existing visualization algorithms. Users can easily construct new visualization methods by combining simple, fine grain building blocks. These components operate on a local subset of the data and generally either look for target feature... View full abstract»

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  • UFAT-a particle tracer for time-dependent flow fields

    Publication Year: 1994, Page(s):257 - 264, CP29
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (628 KB)

    Time-dependent (unsteady) flow fields are commonly generated in computational fluid dynamics (CFD) simulations; however, there are very few flow visualization systems that generate particle traces in unsteady flow fields. Most existing systems generate particle traces in time-independent flow fields. A particle tracing system has been developed to generate particle traces in unsteady flow fields. ... View full abstract»

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  • Visualizing flow with quaternion frames

    Publication Year: 1994, Page(s):108 - 115, CP11
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (496 KB)

    Flow fields, geodesics, and deformed volumes are natural sources of families of space curves that can be characterized by intrinsic geometric properties such as curvature, torsion, and Frenet frames. By expressing a curve's moving Frenet coordinate frame as an equivalent unit quaternion, we reduce the number of components that must be displayed from nine with six constraints to four with one const... View full abstract»

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  • XmdvTool: integrating multiple methods for visualizing multivariate data

    Publication Year: 1994, Page(s):326 - 333
    Cited by:  Papers (134)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (572 KB)

    Much of the attention in visualization research has focussed on data rooted in physical phenomena, which is generally limited to three or four dimensions. However, many sources of data do not share this dimensional restriction. A critical problem in the analysis of such data is providing researchers with tools to gain insights into characteristics of the data, such as anomalies and patterns. Sever... View full abstract»

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  • Observing a volume rendered fetus within a pregnant patient

    Publication Year: 1994, Page(s):364 - 368, CP41
    Cited by:  Papers (20)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (716 KB)

    Augmented reality systems with see-through headmounted displays have been used primarily for applications that are possible with today's computational capabilities. We explore possibilities for a particular application-in-place, real-time 3D ultrasound visualization-without concern for such limitations. The question is not “How well could we currently visualize the fetus in real time,”... View full abstract»

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