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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 8 • Date Aug 1992

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Displaying Results 1 - 8 of 8
  • A theory of multiscale, curvature-based shape representation for planar curves

    Publication Year: 1992, Page(s):789 - 805
    Cited by:  Papers (459)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1228 KB)

    A shape representation technique suitable for tasks that call for recognition of a noisy curve of arbitrary shape at an arbitrary scale or orientation is presented. The method rests on the describing a curve at varying levels of detail using features that are invariant with respect to transformations that do not change the shape of the curve. Three different ways of computing the representation ar... View full abstract»

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  • Recognition of Arabic characters

    Publication Year: 1992, Page(s):853 - 857
    Cited by:  Papers (65)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A statistical approach for the recognition of Arabic characters is introduced. As a first step, the character is segmented into primary and secondary parts (dots and zigzags). The secondary parts of the character are then isolated and identified separately, thereby reducing the number of classes from 28 to 18. The moments of the horizontal and vertical projections of the remaining primary characte... View full abstract»

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  • A novel discrete relaxation architecture

    Publication Year: 1992, Page(s):857 - 865
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (908 KB)

    The discrete relaxation algorithm (DRA) is a computational technique that enforces arc consistency (AC) in a constraint satisfaction problem (CSP). The original sequential AC-1 algorithm suffers from O(n3m3) time complexity, and even the optimal sequential AC-4 algorithm is O (n2m2) for an n-... View full abstract»

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  • Direct recovery of motion and shape in the general case by fixation

    Publication Year: 1992, Page(s):847 - 853
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    A direct method called fixation is introduced for solving the general motion vision problem: arbitrary motion relative to an arbitrary environment. This method results in a linear constraint equation that explicitly expresses the rotational velocity in terms of the translational velocity. The combination of this constraint equation with the brightness-change constraint equation solves the general ... View full abstract»

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  • Matching two perspective views

    Publication Year: 1992, Page(s):806 - 825
    Cited by:  Papers (91)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2048 KB)

    A computational approach to image matching is described. It uses multiple attributes associated with each image point to yield a generally overdetermined system of constraints, taking into account possible structural discontinuities and occlusions. In the algorithm implemented, intensity, edgeness, and cornerness attributes are used in conjunction with the constraints arising from intraregional sm... View full abstract»

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  • Nonlinear image filtering with edge and corner enhancement

    Publication Year: 1992, Page(s):826 - 833
    Cited by:  Papers (156)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    The authors describe a model of nonlinear image filtering for noise reduction and edge enhancement using anisotropic diffusion. The method is designed to enhance not only edges, but corners and T junctions as well. The method roughly corresponds to a nonlinear diffusion process with backward heat flow across the strong edges. Such a process is ill posed, making the results depend strongly on how t... View full abstract»

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  • Surface parametrization and curvature measurement of arbitrary 3-D objects: five practical methods

    Publication Year: 1992, Page(s):833 - 840
    Cited by:  Papers (66)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    Curvature sampling of arbitrary, fully described 3-D objects (e.g. tomographic medical images) is difficult because of surface patch parameterization problems. Five practical solutions are presented and characterized-the Sander-Zucker approach, two novel methods based on direct surface mapping, a piecewise linear manifold technique, and a turtle geometry method. One of the new methods, called the ... View full abstract»

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  • Image interpretation using multiple sensing modalities

    Publication Year: 1992, Page(s):840 - 847
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The AIMS (automatic interpretation using multiple sensors) system, which uses registered laser radar and thermal imagers, is discussed. Its objective is to detect and recognize man-made objects at kilometer range in outdoor scenes. The multisensor fusion approach is applied to four sensing modalities (range, intensity, velocity, and thermal) to improve both image segmentation and interpretation. L... View full abstract»

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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