IEEE Computer Graphics and Applications

Issue 3 • May 1994

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Displaying Results 1 - 10 of 10
  • The Responsive Workbench [virtual work environment]

    Publication Year: 1994, Page(s):12 - 15
    Cited by:  Papers (44)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2531 KB)

    The Responsive Workbench concept was developed as an alternative to the multimedia and virtual reality systems of the past decade. It was recognized that almost nobody wants simulations of their working worlds in a desktop environment. Generally. users want to focus on their tasks rather than on operating the computer. The Responsive Workbench is a virtual working environment that locates virtual ... View full abstract»

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  • GIS feels the Earth move in Los Angeles

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    The 6.6 earthquake that jolted Los Angeles on January 17 caused structural damage estimated at up to $20 billion. The Northridge quake killed 61 people, left thousands homeless, and disrupted the infrastructure supporting a metropolitan population of about 10 million. A state of emergency was declared and the California governor's Office of Emergency Services (OES) moved in to coordinate disaster ... View full abstract»

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  • Ray tracing interference color: visualizing Newton's rings

    Publication Year: 1994, Page(s):17 - 20
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (351 KB)

    Generalized Fresnel's reflectance formulas provide the basis for this ray tracing method, which simulates the natural phenomenon of interference color. A visualization of Newton's rings demonstrates its accuracy.<> View full abstract»

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  • More powerful solid modeling through ray representations

    Publication Year: 1994, Page(s):22 - 35
    Cited by:  Papers (33)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1263 KB)

    Ray-representations simplify geometrical calculations and effectively decouple application design from the particulars of modeling systems. They extend the geometric coverage of solid modelers, while increasing the range of supported applications. The authors list some of the problems with solid modelling and explain how the use of ray representations for solids provides effective solutions to the... View full abstract»

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  • Solving the collision detection problem

    Publication Year: 1994, Page(s):36 - 43
    Cited by:  Papers (65)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    Considers how a happy convergence of factors in the mid 195Os led CEIT and the University of Navarre to team up for an ambitious project. First, we accumulated expertise in the fields of computer graphics, mechanism analysis and solid modeling. Second, the appearance of 3D graphics workstations on the market allowed us to put our experience to work to develop CompAMM (Computer Analysis of Machines... View full abstract»

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  • Color image quantization by agglomerative clustering

    Publication Year: 1994, Page(s):44 - 48
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (529 KB)

    We present a simple and "well-behaved" agglomerative clustering approach to color image quantization, along with results of tests using synthesized and real-life images.<> View full abstract»

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  • Double- and triple-step incremental linear interpolation

    Publication Year: 1994, Page(s):49 - 53
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    Incremental linear interpolation determines the set of n+1 equidistant points on an interval [a,b] where all variables involved (n, a, b, and the set of equidistant points) are integers and n>0. Our method of linear interpolation generalizes the findings of a variable-step line-drawing algorithm. The resulting interpolation algorithm has as many loops as the line-drawing algorithm, but fewer restr... View full abstract»

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  • CCAD: A paradigm for human-computer cooperation in design

    Publication Year: 1994, Page(s):54 - 65
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1283 KB)

    Cooperative computer-aided design (CCAD) is a paradigm for combining the strengths of manual and automated design activity. The goal of CCAD is to support exploratory design, while keeping the user central to the design activity. In the CCAD paradigm, the user expresses initial design decisions in the form of a partial design and a set of properties that the final design must have. The system then... View full abstract»

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  • N-step incremental straight-line algorithms

    Publication Year: 1994, Page(s):66 - 72
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (574 KB)

    This class of algorithms extends Bresenham's (1965) integer straight-line algorithm to generate more than one pixel per inner loop, thus reducing inner loop overhead. The quad-step algorithm is too large to justify its use in older hardware with limited memory space, but it can be viable in the context of modern memory and software sizes. Because the algorithm reduces both calculation overhead and... View full abstract»

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  • Self-similar fractal sets: theory and procedure

    Publication Year: 1994, Page(s):73 - 82
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (882 KB)

    The presented algorithm generates approximations of self-similar fractal sets. The algorithm is based on a pattern rewriting system that draws a geometric pattern repeatedly after suitable mappings. A program developed from the algorithm reproduces Mandelbrot's self-similar fractals. We begin by discussing fractals and dimension theory, then present the algorithm, and conclude by using fractal set... View full abstract»

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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
The QED Group