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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 4 • Date July 1985

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Displaying Results 1 - 20 of 20
  • [Front cover]

    Publication Year: 1985, Page(s): c1
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  • List of Contributors

    Publication Year: 1985, Page(s): nil1
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  • [Breaker page]

    Publication Year: 1985, Page(s): nil1
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  • In Memoriam: King-sun Fu

    Publication Year: 1985
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  • Dynamic Occlusion Analysis in Optical Flow Fields

    Publication Year: 1985, Page(s):374 - 383
    Cited by:  Papers (42)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4354 KB)

    Optical flow can be used to locate dynamic occlusion boundaries in an image sequence. We derive an edge detection algorithm sensitive to changes in flow fields likely to be associated with occlusion. The algorithm is patterned after the Marr-Hildreth zero-crossing detectors currently used to locate boundaries in scalar fields. Zero-crossing detectors are extended to identify changes in direction a... View full abstract»

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  • Determining Three-Dimensional Motion and Structure from Optical Flow Generated by Several Moving Objects

    Publication Year: 1985, Page(s):384 - 401
    Cited by:  Papers (299)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6120 KB)

    A new approach for the interpretation of optical flow fields is presented. The flow field, which can be produced by a sensor moving through an environment with several independently moving, rigid objects, is allowed to be sparse, noisy, and partially incorrect. The approach is based on two main stages. In the first stage, the flow field is partitioned into connected segments of flow vectors, where... View full abstract»

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  • Local Determination of a Moving Contrast Edge

    Publication Year: 1985, Page(s):402 - 409
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1911 KB)

    This paper proposes an intensity-based method for determining the spatial orientation and observed velocity of a continuously moving edge. Space-time relations arise from the translation of a straight edge across a fixed detector array; a tesselation unit comprised of three equidistant detectors is used to exploit these relationships. The time ordering of cells within this unit can estimate edge d... View full abstract»

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  • Recognizing Partially Occluded Parts

    Publication Year: 1985, Page(s):410 - 421
    Cited by:  Papers (79)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2916 KB)

    The problem of recognizing an object from a partially occluded boundary image is considered, and the concept of saliency of a boundary segment is introduced. Saliency measures the extent to which the boundary segment distinguishes the object to which it belongs from other objects which might be present. An algorithm is presented which optimally determines the saliency of boundary segments of one o... View full abstract»

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  • Connected Line Drawing Extraction from a Perspective View of a Polyhedron

    Publication Year: 1985, Page(s):422 - 430
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5967 KB)

    To extract line drawings with positional information from perspective veiws of three-dimensional objects is essential in image analysis and understanding. A new heuristic-search algorithm driven by a priori knowledge contained in a world model is presented which extracts a connected line drawing from a perspective view of a polyhedron. A main feature of our algorithm is that the search is concentr... View full abstract»

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  • Knowledge-Driven Ultrasonic Three-Dimensional Organ Modeling

    Publication Year: 1985, Page(s):431 - 441
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4037 KB)

    A representation is described for nonstructured biologic objects which are single-valued distortions of a sphere. The representation is implemented in a model-driven system for extracting three-dimensional (3-D) organ reconstructions from a series of arbitrarily oriented ultrasound slices. A training set of ultrasonic reconstructions of similarly shaped objects is used to give the computer generic... View full abstract»

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  • Parallel Game-Tree Search

    Publication Year: 1985, Page(s):442 - 452
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3357 KB)

    The design issues affecting a parallel implementation of the alpha-beta search algorithm are discussed with emphasis on a tree decomposition scheme that is intended for use on well ordered trees. In particular, the principal variation splitting method has been implemented, and experimental results are presented which show how such refinements as progressive deepening, narrow window searching, and ... View full abstract»

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  • Attributed String Matching with Merging for Shape Recognition

    Publication Year: 1985, Page(s):453 - 462
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2756 KB)

    A new structural approach to shape recognition using attributed string matching with merging is proposed. After illustrating the disadvantages of conventional symbolic string matching using changes, deletions, and insertions, attributed strings are suggested for matching. Each attributed string is an ordered sequence of shape boundary primitives, each representing a basic boundary structural unit,... View full abstract»

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  • A Width-Independent Fast Thinning Algorithm

    Publication Year: 1985, Page(s):463 - 474
    Cited by:  Papers (70)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3369 KB)

    The skeleton of a digital figure can often be regarded as a convenient alternative to the figure itself. It is useful both to diminish drastically the amount of data to be handled, and to simplify the computational procedures required for description and classification purposes. Thinning a digital figure down to its skeleton is a time-consuming process when conventional sequential computers are em... View full abstract»

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  • Restoration of Multichannel Microwave Radiometric Images

    Publication Year: 1985, Page(s):475 - 484
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3651 KB)

    A constrained iterative image restoration method is applied to multichannel diffraction-limited imagery. This method is based on the Gerchberg-Papoulis algorithm utilizing incomplete information and partial constraints. The procedure is described using the orthogonal projection operators which project onto two prescribed subspaces iteratively. Its properties and limitations are presented. The effe... View full abstract»

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  • Sensing Error for a Mobile Robot Using Line Navigation

    Publication Year: 1985, Page(s):485 - 490
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1141 KB)

    The use of a contrasting line for the visual navigation of autonomous mobile robots in a factory environment is developed. Minimum and maximum linewidths are determined analytically by considering sensor geometry, field of view, and error conditions present in the system. The effects of these error conditions on the width of the line, as seen in the image plane, determines the optimal linewidth. N... View full abstract»

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  • Reliability and Speed of Recall in an Associative Network

    Publication Year: 1985, Page(s):490 - 498
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2099 KB)

    Previous investigations of the storage capacity of associative nets have not explicitly considered quantitative aspects of the tradeoff between storage capacity and reconstructive power in these systems. Furthermore, few comparisons have been made between theoretical estimates and experimental results (simulations). In this correspondence, we describe some results recently obtained and relevant to... View full abstract»

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  • The AI Business: The Commercial Uses of Artificial Intelligence

    Publication Year: 1985, Page(s): 499
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  • List of Reviewers

    Publication Year: 1985, Page(s): 500
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  • List of Contributors

    Publication Year: 1985, Page(s): nil2
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  • [Front cover]

    Publication Year: 1985, Page(s): c2
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Aims & Scope

The IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI) is published monthly. Its editorial board strives to present most important research results in areas within TPAMI's scope.

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Meet Our Editors

Editor-in-Chief
David A. Forsyth
University of Illinois
e-mail: daf@illinois.edu