IEEE Computer Graphics and Applications

Issue 4 • July 1991

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Displaying Results 1 - 10 of 10
  • Visualization blackboard-acoustic holography

    Publication Year: 1991, Page(s):12 - 13
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (122 KB)

    The technique of acoustic holography is explained, using the example of a submerged, radiating, cylindrical object. The generalized near-field acoustical holography, Genah technique is described, focusing on its use of scientific visualization techniques. Incrementing the frequency of the visualized portion of the data set allows the frequency dependence of the acoustic pressure radiating from the... View full abstract»

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  • Pixel-selected ray tracing

    Publication Year: 1991, Page(s):14 - 22
    Cited by:  Papers (9)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (809 KB)

    An acceleration method based on an idea that T. Whitted (Commun. ACM, vol.23, no.6 pp.343-349, June 1980) presented on ray tracing is discussed. He proposed making antialiased images by hierarchical adaptive oversampling. The present authors use hierarchical adaptive undersampling to reduce the number of pixels whose intensity must be calculated by ray tracing. To implement pixel-selected ray trac... View full abstract»

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  • Multimedia scouting

    Publication Year: 1991, Page(s):26 - 38
    Cited by:  Papers (4)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1854 KB)

    Experiments aimed at developing new media types through the serious consideration of existing media are described. Six areas (print, audiovisual, speech, computer-generated activities, materials, and expression of ideas) are examined, and it is shown how the multimedia approach can be used to extend them into new genres of information display. The benefits of multimedia are summarized.<> View full abstract»

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  • Numbers-a medium that counts (spreadsheet software)

    Publication Year: 1991, Page(s):39 - 44
    Cited by:  Papers (2)  |  Patents (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The use of spreadsheets to bring hypermedia to the office is proposed. It is argued that the numeric cell is a powerful generic object type, and its use is explored. The application of Hypercalc (a prototype hypermedia spreadsheet constructed by combining an authoring interface with a series of video device drivers written for Informix's Wingz, a graphical spreadsheet with a built-in scripting lan... View full abstract»

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  • Hypermedia and the study of ancient culture

    Publication Year: 1991, Page(s):45 - 51
    Cited by:  Papers (2)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The author discusses how hypermedia databases can facilitate the study of ancient cultures, where evidence ranges from literary texts to archaeological sites to individual objects, by allowing fluid movement among disparate data. The Perseus Project, which set out to collect as many kinds of data as possible from the earliest period of Greek civilization, is described. The Perseus Project is both ... View full abstract»

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  • Developing multimedia applications

    Publication Year: 1991, Page(s):52 - 57
    Cited by:  Papers (3)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The history of multimedia is reviewed, and a structured set of recommendations for those wishing to develop their own multimedia applications is provided. These pragmatic, operational recommendations, which are based on three video-disc-based multimedia projects successfully completed inexpensively at the author's institution, are embodied in a multiphased approach. Following a description of the ... View full abstract»

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  • Learning through multimedia

    Publication Year: 1991, Page(s):58 - 66
    Cited by:  Papers (20)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1026 KB)

    The creation of multimedia composition tools for young learners is addressed. The factors to consider in designing composing tools are discussed. Such a set of tools, called the Multimedia Works software environment, is described. It consists of three programs: Media Space, a multimedia database and research program; Multimedia Works Composer, a storyboarding and presentation program; and Video Li... View full abstract»

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  • Cinematic primitives for multimedia

    Publication Year: 1991, Page(s):67 - 74
    Cited by:  Papers (69)  |  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (691 KB)

    The development of robust frameworks in interactive multimedia for representing story elements to the machine so that they can be retrieved in multiple contexts is addressed. Interactive multimedia is discussed as a user-directed form of storytelling, and the nature of cinematic storytelling is examined. It is proposed that content can be represented in layers. This model for layered information w... View full abstract»

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  • The demise of multimedia

    Publication Year: 1991, Page(s):75 - 80
    Cited by:  Papers (1)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (515 KB)

    The author uses the term interactive electronic presentation (IEP) to describe a collusion of sounds and images elicited from a piece of electromechanical machinery by the user's persistent activity and urges that it replace multimedia. The differences between the creation and delivery of IEPs is discussed, and it is argued that they require different engines. The characteristics required of each ... View full abstract»

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  • A trip down the graphics pipeline: pixel coordinates

    Publication Year: 1991, Page(s):81 - 85
    Cited by:  Patents (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    A general overview of the classic rendering pipeline is given. An examination of some of the problems that come from the use of transformations in the graphics pipeline is initiated. Exemplary transformations to be used in succeeding articles are derived. It is shown that the obvious way to transform normalized device coordinates to pixel space is wrong. The nature of the pixel space is discussed.... 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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L. Miguel Encarnação
The QED Group