Proceedings Visualization '94

21-21 Oct. 1994

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Displaying Results 1 - 25 of 60
  • 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 reuse | Click to expandAbstract | PDF file iconPDF (459 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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  • Validation, verification and evaluation

    Publication Year: 1994, Page(s):414 - 418
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (481 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. A differen... View full abstract»

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  • Visualizing data: is virtual reality the key?

    Publication Year: 1994, Page(s):410 - 413
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A visualization goal is to simplify the analysis of large-quantity, numerical data by rendering the data as an image that can be intuitively manipulated. The question the article addresses is whether or not virtual reality techniques are the cure-all to the dilemma of visualizing increasing amounts of data. It determines the usefulness of techniques available today and in the near future that will... 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 reuse | Click to expandAbstract | PDF file iconPDF (409 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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  • Visualization in medicine: VIRTUAL reality or ACTUAL reality ?

    Publication Year: 1994, Page(s):396 - 399
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (389 KB)

    Discusses and debates the role played by 3D visualization in medicine as a set of methods and techniques for displaying 3D spatial information related to the anatomy and the physiology of the human body.<<ETX>> 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 reuse | Click to expandAbstract | PDF file iconPDF (378 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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  • Visualization of volcanic ash clouds

    Publication Year: 1994, Page(s):386 - 390
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (427 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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  • Volume rendering of pool fire data

    Publication Year: 1994, Page(s):382 - 385
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (387 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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  • Visualization of an electric power transmission system

    Publication Year: 1994, Page(s):379 - 381
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (312 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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  • New techniques in the design of healthcare facilities

    Publication Year: 1994, Page(s):374 - 377
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (331 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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  • Visualization of 3D ultrasonic data

    Publication Year: 1994, Page(s):369 - 373
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (539 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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  • Observing a volume rendered fetus within a pregnant patient

    Publication Year: 1994, Page(s):364 - 368
    Cited by:  Papers (28)  |  Patents (27)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (773 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," but "How we... View full abstract»

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  • Integrating spatial data display with virtual reconstruction

    Publication Year: 1994, Page(s):359 - 362
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (381 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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  • Visualization of mesoscale flow features in ocean basins

    Publication Year: 1994, Page(s):355 - 358
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (418 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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  • Severe rainfall events in Northwestern Peru (visualization of scattered meteorological data)

    Publication Year: 1994, Page(s):350 - 354
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The ordinarily arid climate of coastal Peru is disturbed every few years by a phenomenon called El Nino, characterized by a warming in the Pacific Ocean. Severe rainstorms are one of the consequences of El Nino, which cause great damage. An examination of daily data from 66 rainfall stations in the Chiura-Piura region of northwestern Peru from late 1982 through mid-1983 (associated with an El Nino... View full abstract»

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  • A case study on visualization for boundary value problems

    Publication Year: 1994, Page(s):345 - 348
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (427 KB)

    In this paper we present a method, and a software based on this method, making highly inter-active visualization possible for computational results on nonlinear BVPs associated with ODEs. The program PCR relies partly on computer graphics tools and partly on real-time computations, the combination of which not only helps the understanding of complex problems, it also permits the reduction of store... View full abstract»

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  • Visualization and data analysis in space and atmospheric science

    Publication Year: 1994, Page(s):341 - 344
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (370 KB)

    In this paper we show how SAVS, a tool for visualization and data analysis in space and atmospheric science, can be used to quickly and easily address problems that would previously have been far more laborious to solve. Based on the popular AVS package, SAVS presents the user with an environment tailored specifically for the physical scientist. Thus there is minimal "startup" time, and the scient... View full abstract»

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  • Tokamak plasma turbulence visualization

    Publication Year: 1994, Page(s):337 - 340
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    One of the most fundamental issues in magnetic fusion research is the understanding of turbulent transport observed in present-day tokamak experiments. Plasma turbulence is very challenging from a theoretical point of view due to the nonlinearity and high dimensionality of the governing equations. Recent developments in algorithms along with the astounding advances in high performance computing no... 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 (161)  |  Patents (11)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (661 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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  • An object oriented design for the visualization of multi-variable data objects

    Publication Year: 1994, Page(s):318 - 325
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (699 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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  • A lattice model for data display

    Publication Year: 1994, Page(s):310 - 317
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (699 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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  • Mix&Match: a construction kit for visualization

    Publication Year: 1994, Page(s):302 - 309
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (812 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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  • Nonpolygonal isosurface rendering for large volume datasets

    Publication Year: 1994, Page(s):293 - 300
    Cited by:  Papers (3)  |  Patents (14)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (916 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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  • Approximation of isosurface in the Marching Cube: ambiguity problem

    Publication Year: 1994, Page(s):288 - 292
    Cited by:  Papers (15)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (355 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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  • Discretized Marching Cubes

    Publication Year: 1994, Page(s):281 - 287
    Cited by:  Papers (51)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (698 KB)

    Since the introduction of standard techniques for isosurface extraction from volumetric datasets, one of the hardest problems has been to reduce the number of triangles (or polygons) generated. The paper presents an algorithm that considerably reduces the number of polygons generated by a Marching Cubes-like scheme (W. Lorensen and H. Cline, 1987) without excessively increasing the overall computa... View full abstract»

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