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IEEE Computer Graphics and Applications

Issue 5 • Date Sep 1995

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Displaying Results 1 - 12 of 12
  • Exploiting reality with multicast groups

    Publication Year: 1995, Page(s):38 - 45
    Cited by:  Papers (85)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    This article describes our investigation into developing large distributed simulations. The architecture we describe logically partitions virtual environments by associating spatial, temporal, and functional classes with network multicast groups. We exploit the actual characteristics of the real-world large scale environments being simulated by focusing or restricting an entity's processing and ne... View full abstract»

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  • Training the Hubble space telescope flight team

    Publication Year: 1995, Page(s):31 - 37
    Cited by:  Papers (44)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    As the results demonstrate, members of the flight team judged, on average, that the use of a virtual environment for training had a positive effect on their job performance during the HST repair and maintenance mission. Moreover, audio and visual cues provided a positive aid in using the virtual environment. The discomfort experienced by some of the participants did not pose a serious problem with... View full abstract»

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  • Providing force feedback in virtual environments

    Publication Year: 1995, Page(s):22 - 30
    Cited by:  Papers (12)  |  Patents (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    An integral part of successfully manipulating objects is the sensation of touch or force. Experiments with telerobots (robots controlled at a distance) show that the sensation of force and contact improves the efficiency and accuracy of such tasks. Many believe that the same can be said of tasks in a virtual environment. Unfortunately, it is not possible to actually grasp a virtual object in the s... View full abstract»

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  • Undersea and in the air: VR offers a thrill a minute

    Publication Year: 1995, Page(s):15 - 18
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Virtual reality in public entertainment has been called a zero-billion dollar industry. For three or four years, we've read and heard a lot of hype about the potential profits in taking VR technology developed for the military and using it to make people smile. But as yet only a handful of companies have attempted to create systems that can generate profits as well as graphics View full abstract»

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  • Mission visualization for planning and training

    Publication Year: 1995, Page(s):12 - 14
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The question often arises whether virtual reality serves any purpose other than for games and entertainment. We believe VR can provide unique benefits to one problem domain: training for operations where classroom instruction is insufficient but “hands-on” practice is dangerous, expensive, logistically complex, or limited in the possible range of experience. Examples of such applicatio... View full abstract»

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  • How to draw a sphere. 3. The hyperbolic horizon

    Publication Year: 1995, Page(s):87 - 93
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    We want to draw a sphere. Actually, we want to draw an arbitrarily scaled and oriented ellipsoid. In part one I showed some matrix algebra for describing, transforming, and intersecting points, planes, and quadric surfaces (which include spheres). In part two I defined some useful coordinate systems and transformations. With the proper handling of hyperbolic silhouette curves the program works for... View full abstract»

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  • Visualization of solid reaction-diffusion systems

    Publication Year: 1995, Page(s):7 - 11
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    In 1952, mathematician Alan Turing introduced reaction diffusion. This mechanism permits large-scale features to emerge in the concentrations of chemicals that react and diffuse within an array of reaction sites, or cells. Recently, we used a cellular automaton-based reaction-diffusion system to generate textures for computer graphics applications. We extended the original binary nature of cellula... View full abstract»

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  • Trade-off between resolution and interactivity in spatial task performance

    Publication Year: 1995, Page(s):46 - 51
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Virtual reality displays usually lag far behind classical computer graphics displays in static image quality parameters, such as resolution. Both the popular press and scientific papers often stress that resolution will have to increase greatly before users can experience virtual environments as “the real thing”. Nevertheless, it is already possible to do some useful work in VR environ... View full abstract»

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  • Dynamic registration correction in video-based augmented reality systems

    Publication Year: 1995, Page(s):52 - 60
    Cited by:  Papers (61)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    Augmented reality systems allow users to interact with real and computer-generated objects by displaying 3D virtual objects registered in a user's natural environment. Applications of this powerful visualization tool include previewing proposed buildings in their natural settings, interacting with complex machinery for purposes of construction or maintenance training, and visualizing in-patient me... View full abstract»

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  • Delaunay triangulation in three dimensions

    Publication Year: 1995, Page(s):62 - 69
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Triangulation in two and higher dimensions began with Dirichlet, Voronoi, Thiessen, and Delaunay. A number of textbooks and papers have extensively covered the properties of triangulations and algorithms for their construction. Most dealt with theoretical aspects of the algorithms and gave upper bounds on their complexity. Here we present a new algorithm and its implementation. Instead of providin... View full abstract»

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  • Manipulating facial appearance through shape and color

    Publication Year: 1995, Page(s):70 - 76
    Cited by:  Papers (128)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A technique for defining facial prototypes is described which supports transformations along quantifiable dimensions in “face space”. Examples illustrate the use of shape and color information to perform predictive gender and age transformations. The processes we describe begin with the creation of a facial prototype. Generally, a prototype can be defined as a representation containing... View full abstract»

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  • Model-based analysis of hand posture

    Publication Year: 1995, Page(s):77 - 86
    Cited by:  Papers (131)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    Researchers have successfully recognized specific fingers of the hand by silhouette images and distinguished a small set of hand signs by contour features of images. However, the silhouette or contour features recovered from the images do not provide sufficient information to generate a 3D hand posture with the fingers positioned properly. This failure led to our study, which developed a new metho... 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