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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  • 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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  • Vortex tubes in turbulent flows: identification, representation, reconstruction

    Publication Year: 1994, Page(s):132 - 139, CP14
    Cited by:  Papers (33)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A new algorithm for identifying vortices in complex flows is presented. The scheme uses both the vorticity and pressure fields. A skeleton line along the center of a vortex is produced by a two-step predictor-corrector scheme. The technique uses the vector field to move in the direction of the skeleton line and the scalar field to correct the location in the plane perpendicular to the skeleton lin... 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Visualization of mesoscale flow features in ocean basins

    Publication Year: 1994, Page(s):355 - 358, CP39
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    Environmental issues such as global warming are an active area of international research and concern today. This case study describes various visualization paradigms that have been developed and applied in an attempt to elucidate the information provided by environmental models and observations. The ultimate goal is to accurately measure the existence of any long term climatological change. The gl... 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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  • Spiders: a new user interface for rotation and visualization of n-dimensional point sets

    Publication Year: 1994, Page(s):205 - 211, CP22
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    We present a new method for creating n-dimensional rotation matrices from manipulating the projections of n-dimensional data coordinate axes onto a viewing plane. A user interface for n-dimensional rotation is implemented. The interface is shown to have no rotational hysteresis 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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  • 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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  • Visualization of 3D ultrasonic data

    Publication Year: 1994, Page(s):369 - 373, CP42
    Cited by:  Papers (3)
    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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  • 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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  • 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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  • 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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  • 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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  • 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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  • Integrating spatial data display with virtual reconstruction

    Publication Year: 1994, Page(s):359 - 362, CP40
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In the process of archaeological excavation, a vast amount of data, much of it three-dimensional in nature, is recorded. In recent years, computer graphics techniques have been applied to the task of visualizing such data. In particular, data visualization has been used to accomplish the virtual reconstruction of site architecture and to enable the display of spatial data distributions using three... View full abstract»

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  • Visualizing multidimensional (multivariate) data and relations

    Publication Year: 1994, Page(s):404 - 409
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The paper provides a review of the field of multidimensional data visualisation and discusses some promising methodologies. It considers some crucial problems and directions. The emphasis is more on concepts and foundations rather than ad hoc methods. Visualization is considered as a collection of transformations from problem domains to a perceptual domain, usually visual. The paper discusses the ... View full abstract»

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  • Challenges and opportunities in visualization for NASA's EOS Mission to Planet Earth

    Publication Year: 1994, Page(s):392 - 395
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Visualization will be vital to the success of the NASA EOS Mission to Planet Earth (MTPE), which will gather, generate, and distribute an unprecedented volume of data for the purpose of global change research and environmental policy decisions. The paper focuses on the challenges and opportunities for visualization with regard to the Mission to Planet Earth. Directions presently being taken within... View full abstract»

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  • VolVis: a diversified volume visualization system

    Publication Year: 1994, Page(s):31 - 38, CP3
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    VolVis is a diversified, easy to use, extensible, high performance, and portable volume visualization system for scientists and engineers as well as for visualization developers and researchers. VolVis accepts as input 3D scalar volumetric data as well as 3D volume-sampled and classical geometric models. Interaction with the data is controlled by a variety of 3D input devices in an input device-in... View full abstract»

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  • Triangulation and display of rational parametric surfaces

    Publication Year: 1994, Page(s):69 - 76, CP6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    We present a comprehensive algorithm to construct a topologically correct triangulation of the real affine part of a rational parametric surface with few restrictions on the defining rational functions. The rational functions are allowed to be undefined on domain curves (pole curves) and at certain special points (base points), and the surface is allowed to have nodal or cuspidal self-intersection... View full abstract»

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