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IBM Journal of Research and Development

Issue 1 • Date Jan. 1987

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Displaying Results 1 - 13 of 13
  • Digital halftoning on the IBM 4250 Printer

    Publication Year: 1987, Page(s):2 - 15
    Cited by:  Papers (5)  |  Patents (47)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1597 KB)

    A method of reproducing high-quality continuous-tone images via the IBM 4250 Printer is presented. The approach is modeled on the halftone process used in conventional lithography but is adapted to discrete bilevel printing and digital processing. We use a combination of standard and novel techniques. These include generation and calibration of a set of halftone dot patterns, randomized error prop... View full abstract»

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  • Binary-image-manipulation algorithms in the Image View Facility

    Publication Year: 1987, Page(s):16 - 31
    Cited by:  Patents (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1271 KB)

    Most current implementations of electronic mail deal primarily with coded information. A scanned-document-handling system that could scan a document, distribute it, display it on terminals, and print it on host-attached printers would offer a similar convenience for documents in hard-copy rather than coded form. For such a system to be practical, fast software is needed for a number of image-manip... View full abstract»

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  • PANDA: Processing Algorithm for Noncoded Document Acquisition

    Publication Year: 1987, Page(s):32 - 43
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1063 KB)

    With a scanned-document-handling system, documents can be scanned, stored, transmitted to remote locations, viewed on displays and terminals, edited, and printed. These systems hold much promise for office automation, since they facilitate the communication and storage of information that is not easily recoded into the traditional formats for text and graphics. However, most of the current systems... View full abstract»

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  • YODA: An advanced display for personal computers

    Publication Year: 1987, Page(s):44 - 57
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1148 KB)

    YODA (the YOrktown Display Adapter) is an experimental display designed to improve the quality and speed of users' interactions with personal computers. This paper describes the YODA hardware architecture and software design. Special attention is given to techniques used for antialiasing. The various trade-offs and decisions that were made are discussed. View full abstract»

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  • Document convergence in an interactive formatting system

    Publication Year: 1987, Page(s):58 - 72
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1091 KB)

    One of the most complex aspects of document formatting is the processing of references to remote objects such as headings and figures. In the case of a forward reference to an object that occurs later in the document, two formatting passes are usually needed before the document converges to a stable state. Some documents require more than two passes to converge, and cases are known of documents th... View full abstract»

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  • LEXX—A programmable structured editor

    Publication Year: 1987, Page(s):73 - 80
    Cited by:  Papers (1)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (736 KB)

    Many sophisticated and specialized editing programs have been developed in recent years. These editors help people manipulate data, but the diversity complicates rather than simplifies computer use. LEXX is an editing program that can work with the syntax and structure of the data it is presenting, yet is not restricted to just one kind of data. It is used for editing programs, documents, and othe... View full abstract»

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  • A method for efficient storage and rapid application of context-sensitive phonological rules for automatic speech recognition

    Publication Year: 1987, Page(s):81 - 90
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (689 KB)

    In an automatic speech-recognition system, the application of phonological rules to phonemic strings in order to create phonetic graphs is a computationally time- and storage-consuming process. A great many such graphs must be constructed during the decoding phase; thus it is important to be able to rapidly construct phonetic graphs for strings of words from graphs of individual words. However, be... View full abstract»

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  • Feature analysis for symbol recognition by elastic matching

    Publication Year: 1987, Page(s):91 - 95
    Cited by:  Papers (7)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (419 KB)

    A technique has been developed for the recognition of unconstrained handwritten discrete symbols based on elastic matching against a set of prototypes generated by individual writers. The incorporation of feature analysis with elastic matching to eliminate unlikely prototypes is presented in this paper and is shown to greatly reduce the required processing time without any deterioration in recogni... View full abstract»

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  • Drop formation by DOD ink-jet nozzles: A comparison of experiment and numerical simulation

    Publication Year: 1987, Page(s):96 - 110
    Cited by:  Papers (4)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1315 KB)

    This paper presents a comparison of a numerical simulation of drop formation and ejection from a drop-on-demand (DOD) ink-jet nozzle with experimental observations from a particular nozzle-transducer design. In the numerical simulation, first the pressure waves in the transducer chamber are calculated using inviscid compressible flow theory to obtain the pressure history at the inner face of the n... View full abstract»

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  • DNA vectorgrams: Representation of cancer genes as movements on a 2D cellular lattice

    Publication Year: 1987, Page(s):111 - 119
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (660 KB)

    A brief introduction introduction to a computer graphics characterization of cancer DNA sequences, as well as other biologically interesting sequences, is presented. The procedure described takes DNA sequences containing n bases and computes n two-dimensional real vectors. When displayed on a planar unit-cellular lattice, these characteristic patterns appear as a “DNA vectorgram,” C(... View full abstract»

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  • Path hierarchies in interconnection networks

    Publication Year: 1987, Page(s):120 - 131
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (987 KB)

    This paper treats the problem of latency minimization in an interconnection network for a system of N high-performance devices. The networks considered here have data transport separated from control, with the data subnetwork designed so that each network function requires only a single control message, and thus only one contention-resolution delay. For sufficiently large N it is shown that (for a... View full abstract»

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  • Recent papers by IBM authors

    Publication Year: 1987, Page(s):132 - 144
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1078 KB)

    The information listed here is supplied by the Institute for Scientific Information. Reprints of the papers may be obtained by writing directly to the first author cited. Papers are listed alphabetically by author. View full abstract»

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  • Recent IBM patents

    Publication Year: 1987, Page(s):145 - 148
    IEEE is not the copyright holder of this material | PDF file iconPDF (294 KB)
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Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center