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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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    Freely Available from IEEE
  • Visualization of 3D ultrasonic data

    Publication Year: 1994, Page(s):369 - 373, CP42
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    3D ultrasound is one of the most interesting non-invasive, non-radiative tomographic techniques. Rendering 3D models from such data is not straightforward due to the noisy, fuzzy nature of ultrasound imaging containing a lot of artefacts. We first apply speckle, median and gaussian prefiltering to improve the image quality. Using several semi-automatic segmentation tools we isolate interesting fea... View full abstract»

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  • Progressive transmission of scientific data using biorthogonal wavelet transform

    Publication Year: 1994, Page(s):93 - 99, CP9
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    An important issue in scientific visualization systems is the management of data sets. Most data sets in scientific visualization, whether created by measurement or simulation, are usually voluminous. The goal of data management is to reduce the storage space and the access time of these data sets to speed up the visualization process. A new progressive transmission scheme using spline biorthogona... View full abstract»

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  • New techniques in the design of healthcare facilities

    Publication Year: 1994, Page(s):374 - 377, CP43
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The recent advent of computer graphics techniques has helped to bridge the gap between architectural concepts and actual buildings. Closing this gap is especially critical in healthcare facilities. We present new techniques to support the design decision process and apply them to the design of a neonatal intensive care unit. Two issues are addressed: ergonometric accessibility and visual supervisi... View full abstract»

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  • An evaluation of reconstruction filters for volume rendering

    Publication Year: 1994, Page(s):100 - 107, CP10
    Cited by:  Papers (99)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    To render images from a three-dimensional array of sample values, it is necessary to interpolate between the samples. This paper is concerned with interpolation methods that are equivalent to convolving the samples with a reconstruction filter; this covers all commonly used schemes, including trilinear and cubic interpolation. We first outline the formal basis of interpolation in three-dimensional... 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 (39)
    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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  • Visualization of an electric power transmission system

    Publication Year: 1994, Page(s):379 - 381, CP44
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    Visualization techniques are applied to an electric power system transmission network to create a graphical picture of network power flows and voltages. A geographic data map is used. Apparent power flow is encoded as the width of an arrow, with direction from real power flow. Flows are superposed on flow limits. Contour plots and color coding failed for representing bus voltages. A two-color ther... 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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  • 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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  • Volume rendering of pool fire data

    Publication Year: 1994, Page(s):382 - 385, CP45
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    We describe how techniques from computer graphics are used to visualize pool fire data and compute radiative effects from pool fires. The basic tools are ray casting and accurate line integration using the RADCAL program. Example images in the visible and infrared band are shown which are given of irradiation calculations and novel methods to visualize the results of irradiation calculations View full abstract»

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  • A lattice model for data display

    Publication Year: 1994, Page(s):310 - 317
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    In order to develop a foundation for visualization, we develop lattice models for data objects and displays that focus on the fact that data objects are approximations to mathematical objects and real displays are approximations to ideal displays. These lattice models give us a way to quantize the information content of data and displays and to define conditions on the visualization mappings from ... View full abstract»

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  • Feature detection from vector quantities in a numerically simulated hypersonic flow field in combination with experimental flow visualization

    Publication Year: 1994, Page(s):117 - 123, CP12
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    In computational fluid dynamics visualization is a frequently used tool for data evaluation, understanding of flow characteristics, and qualitative comparison to flow visualizations originating from experiments. Building on an existing visualization software system, that allows for a careful selection of state-of-the-art visualization techniques and some extensions, it became possible to present v... 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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  • Virtual reality performance for virtual geometry

    Publication Year: 1994, Page(s):156 - 163, CP17
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    We describe the theoretical and practical visualization issues solved in the implementation of an interactive real-time four-dimensional geometry interface for the CAVE, an immersive virtual reality environment. While our specific task is to produce a “virtual geometry” experience by approximating physically correct rendering of manifolds embedded in four dimensions, the general princi... View full abstract»

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  • An annotation system for 3D fluid flow visualization

    Publication Year: 1994, Page(s):273 - 279, CP31
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Annotation is a key activity of data analysis. However, current data analysis systems focus almost exclusively on visualization. We propose a system which integrates annotations into a visualization system. Annotations are embedded in 3D data space, using the Post-it metaphor. This embedding allows contextual-based information storage and retrieval, and facilitates information sharing in collabora... View full abstract»

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  • Visualization of volcanic ash clouds

    Publication Year: 1994, Page(s):386 - 390, CP46
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Ash clouds resulting from volcanic eruptions are a serious hazard to aviation safety. In Alaska alone, there are over 40 active volcanoes whose eruptions may affect more than 40,000 flights using the great circle polar routes each year. The clouds are especially problematic because they are invisible to radar and nearly impossible to distinguish from weather clouds. The Arctic Region Supercomputin... View full abstract»

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  • Implicit modeling of swept surfaces and volumes

    Publication Year: 1994, Page(s):40 - 45, CP4
    Cited by:  Papers (21)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Swept surfaces and volumes are generated by moving a geometric model through space. Swept surfaces and volumes are important in many computer-aided design applications including geometric modeling, numerical cutter path generation, and spatial path planning. In this paper we describe a numerical algorithm to generate swept surfaces and volumes using implicit modeling techniques. The algorithm is a... 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 (28)  |  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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  • An object oriented design for the visualization of multi-variable data objects

    Publication Year: 1994, Page(s):318 - 325, CP35
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper presents an object-oriented system design supporting the composition of scientific data visualization techniques based on the definition of hierarchies of typed data objects and tools. Traditional visualization systems focus on creating graphical objects which often cannot be re-used for further processing. Our approach provides objects of different topological dimension to offer a natu... 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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  • 3D visualization of unsteady 2D airplane wake vortices

    Publication Year: 1994, Page(s):124 - 131, CP13
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    Air flowing around the wing tips of an airplane forms horizontal tornado-like vortices that can be dangerous to following aircraft. The dynamics of such vortices, including ground and atmospheric effects, can be predicted by numerical simulation, allowing the safety and capacity of airports to be improved. We introduce three-dimensional techniques for visualizing time-dependent, two-dimensional wa... 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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  • Volume rendering methods for computational fluid dynamics visualization

    Publication Year: 1994, Page(s):232 - 239, CP26
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The paper describes three alternative volume rendering approaches to visualizing computational fluid dynamics (CFD) data. One new approach uses realistic volumetric gas rendering techniques to produce photo-realistic images and animations from scalar CFD data. The second uses ray casting that is based an a sampler illumination model and is mainly centered around a versatile new tool for the design... 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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  • 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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