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IEEE Computer Graphics and Applications

Issue 6 • Nov. 1994

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Displaying Results 1 - 10 of 10
  • Graphic voyages through the universe

    Publication Year: 1994, Page(s):7 - 11
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Part of our romance with the universe is its sheer enormity. This fascination with our place and our origin transcends professional, cultural, and historical boundaries. Images are a particularly valuable currency of exchange across these boundaries. The paper considers how computer graphics makes the universe accessible, giving substance to voyages of the scientific imagination. It discusses the ... View full abstract»

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  • Comet explodes on Jupiter-and the Web

    Publication Year: 1994, Page(s):12 - 13
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB)

    Between the 16th and 22nd of July 1994, the periodic comet designated P/Shoemaker-Levy 9 crashed into Jupiter. Scientists hoped to learn about the makeup and behavior of both comets and Jupiter's atmosphere from the size, appearance, and composition of the impact plumes. The scientific community did not go into the event unprepared. Teams at several supercomputing centers ran simulations that pred... View full abstract»

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  • Four decades of computer graphics

    Publication Year: 1994, Page(s):14 - 19
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (738 KB)

    Starting from a single display giving test-data feedback on MIT's Whirlwind system, computer graphics grew to a multibillion-dollar industry that revolutionized human-computer communication. Cutting across all application areas-whether engineering and scientific, or business and arts/entertainment-are the fundamental technologies and business issues of computer graphics. The increasing power of th... View full abstract»

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  • Fast polygon scan conversion with medical applications

    Publication Year: 1994, Page(s):20 - 27
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (846 KB)

    The algorithm presented for polygon scan conversion is very fast and can replace the standard version in any application. Special requirements from medical data sets illustrate its practicality and versatility. The polygon scan conversion problem refers to filling the interior of a region represented by one or more polygons. The polygons are represented by the coordinates of their vertices in cycl... View full abstract»

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  • Surface reconstruction by multiaxial triangulation

    Publication Year: 1994, Page(s):28 - 35
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB)

    Outlines for reconstructing object surfaces are traditionally drawn from sequential images in parallel planes. The method presented here instead supports complex object topologies by drawing contours from multiaxial image planes. Multiaxial triangulation of an object in a given data volume involves four steps. First, the user generates contours interactively by selecting sample planes inside the d... View full abstract»

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  • A knowledge-based system for visualization design

    Publication Year: 1994, Page(s):36 - 47
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1294 KB)

    Vista is a knowledge-based system that helps scientists design visualization techniques. It generates a technique for a given data set and lets users modify the design interactively using a compositional design methodology. To ensure the effectiveness of its designs, Vista uses many rules, mostly heuristic in nature, that were acquired through literature surveys and discussions with visualization ... View full abstract»

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  • Radiosity and relaxation methods

    Publication Year: 1994, Page(s):48 - 58
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    To date, there has been some confusion in the computer graphics community about how the progressive radiosity (PR) method relates to standard numerical methods for solving linear systems of equations. We show that PR is actually equivalent to the combination of two numerical analysis techniques known as Southwell relaxation and Jacobi iteration. A new overshooting method similar to over relaxation... View full abstract»

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  • NURBS-based free-form deformations

    Publication Year: 1994, Page(s):59 - 65
    Cited by:  Papers (76)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (787 KB)

    Since the advent of computer-based geometric modeling, designers have tried to develop modeling and deformation tools that allow users to emulate the ease with which sculptors work with clay. T.W. Sederberg and S.R. Parry (1986) demonstrated the application of free-form deformations. FFDs let the user conceptually embed an object in a clear pliable solid and apply deformations to the solid, which ... View full abstract»

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  • Performance evaluation of boundary data structures

    Publication Year: 1994, Page(s):66 - 77
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1115 KB)

    Boundary representations, or B-reps, are a solid modeling technique with widespread applications in computer-aided design, computer-aided manufacturing, and robotics. B-reps have evolved considerably in recent years, and advances in theoretic studies-particularly in topological models and associated operators-make it possible now to model nonorientable, nonmanifold objects, as well as orientable, ... View full abstract»

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  • Composting, part 2: practice

    Publication Year: 1994, Page(s):78 - 82
    Cited by:  Papers (1)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB)

    For pt. 1 see ibid., 1994. The author discusses the practice of image composting and in particular the Porter-Duff "over" operator. In part 1 we derived the operator for compositing a foreground pixel F "over" a background pixel B as: B(1-F/spl alpha/)+F, where each pixel is a vector with four components: red, green, blue, and alpha (the coverage or opacity amount), and standard vector algebra app... View full abstract»

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Aims & Scope

IEEE CG&A bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a unique combination of peer-reviewed feature articles and informal departments, including product announcements.

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Meet Our Editors

Editor-in-Chief
L. Miguel Encarnação
University of Iowa