By Topic

IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 10 • Oct 1989

Filter Results

Displaying Results 1 - 9 of 9
  • Line-drawing interpretation: bilateral symmetry

    Publication Year: 1989, Page(s):1117 - 1120
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    Results previously derived by the author are used to investigate the implication of bilateral symmetry in line drawings. It is shown that the line drawing of an orthographically protected surface of revolution exhibits bilateral symmetry about the projection of its axis of revolution irrespective of the viewing direction. Barring one exception, a bilaterally symmetric line drawing is necessarily t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Localization and noise in edge detection

    Publication Year: 1989, Page(s):1106 - 1117
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1236 KB)

    Two aspects of edge detection are analyzed, namely accuracy of localization and sensitivity to noise. The detection of corners and trihedral vertices is analyzed for gradient schemes and zero-crossing schemes. It is shown that neither scheme correctly detects corners of trihedral vertices, but that the gradient schemes are less sensitive to noise. A simple but important conclusion is that the nois... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Obstacle avoidance using flow field divergence

    Publication Year: 1989, Page(s):1102 - 1106
    Cited by:  Papers (131)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    The use of certain measures of flow field divergence is investigated as a qualitative cue for obstacle avoidance during visual navigation. It is shown that a quantity termed the directional divergence of the 2-D motion field can be used as a reliable indicator of the presence of obstacles in the visual field of an observer undergoing generalized rotational and translational motion. The necessary m... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimation of classifier performance

    Publication Year: 1989, Page(s):1087 - 1101
    Cited by:  Papers (42)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    An expression for expected classifier performance previously derived by the authors (ibid., vol.11, no.8, p.873-855, Aug. 1989) is applied to a variety of error estimation methods and a unified and comprehensive approach to the analysis of classifier performance is presented. After the error expression is introduced, it is applied to three cases: (1) a given classifier and a finite test set; (2) g... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Skeletonization via the realization of the fire front's propagation and extinction in digital binary shapes

    Publication Year: 1989, Page(s):1076 - 1086
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    A sequential method of skeletonization for digital binary images is proposed. The method realizes in a discrete plane prairie-fire propagation model. The techniques of contour following is adopted to simulate the simultaneous fire spreading off of the grass perimeter. The algorithm contains two steps: (1) find and mark all of the contours of the input image during a conventional scan. Then, after ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Image flow segmentation and estimation by constraint line clustering

    Publication Year: 1989, Page(s):1010 - 1027
    Cited by:  Papers (93)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2064 KB)

    Image flow is the velocity field in the image plane caused by the motion of the observer, objects in the scene, or apparent motion, and can contain discontinuities due to object occlusion in the scene. An algorithm that can estimate the image flow velocity field when there are discontinuities due to occlusions is described. The constraint line clustering algorithm uses a statistical test to estima... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Geometric precision in noise-free digital images

    Publication Year: 1989, Page(s):1065 - 1075
    Cited by:  Papers (30)  |  Patents (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    A basis for determining the best possible precision for the position of a given object in a digital image is developed. The approach is general, being independent of object-form and providing a performance bound on all position estimation schemes. The central concepts in the development are the locale and total variation of the image function. An easily computed bound for the smallest attainable R... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Toward a model-based Bayesian theory for estimating and recognizing parameterized 3-D objects using two or more images taken from different positions

    Publication Year: 1989, Page(s):1028 - 1052
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2396 KB)

    A parametric modeling and statistical estimation approach is proposed and simulation data are shown for estimating 3-D object surfaces from images taken by calibrated cameras in two positions. The parameter estimation suggested is gradient descent, though other search strategies are also possible. Processing image data in blocks (windows) is central to the approach. After objects are modeled as pa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 3-D moment forms: their construction and application to object identification and positioning

    Publication Year: 1989, Page(s):1053 - 1064
    Cited by:  Papers (138)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    The 3-D moment method is applied to object identification and positioning. A general theory of deriving 3-D moments invariants is proposed. The notion of complex moments is introduced. Complex moments are defined as linear combinations of moments with complex coefficients and are collected into multiplets such that each multiplet transforms irreducibly under 3-D rotations. The application of the 3... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Sven Dickinson
University of Toronto
e-mail: sven@cs.toronto.edu