By Topic

IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 8 • Date Aug 1993

Filter Results

Displaying Results 1 - 11 of 11
  • The intensity axis of symmetry and its application to image segmentation

    Publication Year: 1993, Page(s):753 - 770
    Cited by:  Papers (25)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1880 KB)

    The authors present the intensity axis of symmetry (IAS) method for describing the shape of structures in grey-scale images. They describe the spatial and intensity variations of the image simultaneously rather than by the usual two-step process of using intensity properties of the image to segment an image into regions and describing the spatial shape of these regions. The result is an image shap... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive split-and-merge segmentation based on piecewise least-square approximation

    Publication Year: 1993, Page(s):808 - 815
    Cited by:  Papers (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    The performance of the classic split-and-merge segmentation algorithm is severely hampered by its rigid split-and-merge processes, which are insensitive to the image semantics. The author proposes efficient algorithms and data structures to optimize the split-and-merge processes by piecewise least-square approximation of image intensity functions. This optimization aims at the unification of segme... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pattern recognition properties of various feature spaces for higher order neural networks

    Publication Year: 1993, Page(s):795 - 801
    Cited by:  Papers (18)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    The authors explore alternatives that reduce the number of network weights while maintaining geometric invariant properties for recognizing patterns in real-time processing applications. This study is limited to translation and rotation invariance. The primary interest is in examining the properties of various feature spaces for higher-order neural networks (HONNs), in correlated and uncorrelated ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Darboux frames, snakes, and super-quadrics: geometry from the bottom up

    Publication Year: 1993, Page(s):771 - 784
    Cited by:  Papers (75)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1196 KB)

    A representational and a computational model for deriving 3-D articulated volumetric descriptions of objects from laser rangefinder data is described. This method is purely bottom up: it relies on general assumptions cast in terms of differential geometry. Darboux frames, snakes, and superquadrics form the basis of this representation, and curvature consistency provides the computational framework... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shape from shading with a linear triangular element surface model

    Publication Year: 1993, Page(s):815 - 822
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    The authors propose to combine a triangular element surface model with a linearized reflectance map to formulate the shape-from-shading problem. The main idea is to approximate a smooth surface by the union of triangular surface patches called triangular elements and express the approximating surface as a linear combination of a set of nodal basis functions. Since the surface normal of a triangula... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On learning to recognize 3-D objects from examples

    Publication Year: 1993, Page(s):833 - 837
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Previous results on nonlearnability of visual concepts relied on the assumption that such concepts are represented as sets of pixels. The author uses an approach developed by Haussler (1989) to show that under an alternative, feature-based representation, recognition is probably approximately correct (PAC) learnable from a feasible number of examples in a distribution-free manner View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Vehicle-type motion estimation from multi-frame images

    Publication Year: 1993, Page(s):802 - 808
    Cited by:  Papers (10)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    A model for vehicle-type motion, which assumes that the motion is a rotation around an axis through the vehicle center followed by a forward translation along the main axis of the vehicle, is proposed. When the rotation and the amplitude of translation are constant, this type of motion is shown to be equivalent to a constant camera-centered motion. This indicates that a constant motion in the conv... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Constrained clustering as an optimization method

    Publication Year: 1993, Page(s):785 - 794
    Cited by:  Papers (103)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    A deterministic annealing approach to clustering is derived on the basis of the principle of maximum entropy. This approach is independent of the initial state and produces natural hierarchical clustering solutions by going through a sequence of phase transitions. It is modified for a larger class of optimization problems by adding constraints to the free energy. The concept of constrained cluster... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimally small operator supports for fully parallel thinning algorithms

    Publication Year: 1993, Page(s):828 - 833
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    Requirements for the support size and shape are investigated for the class of all adequate fully parallel thinning operators. Eleven pixel supports are shown to be the smallest possible supports, and the possible positions of the support pixels are shown to be well constrained. Constraints on support positions are demonstrated for operators with supports that are larger than optimal, and a suffici... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Early jump-out corner detectors

    Publication Year: 1993, Page(s):823 - 828
    Cited by:  Papers (34)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The authors present two new corner detectors. One works by using dissimilarity, along the contour direction to detect curves in the image contour, and the other estimates image curvature along the contour direction. These operators are fast, robust to noise, and require no subjective thresholding View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A constrained approach to multifont Chinese character recognition

    Publication Year: 1993, Page(s):838 - 843
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The constraint graph is introduced as a general character representation framework for recognizing multifont, multiple-size Chinese characters. Each character class is described by a constraint graph model. Sampling points on a character skeleton are taken as nodes in the graph. Connection constraints and position constraints are taken as arcs in the graph. For patterns of the same character class... 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
David A. Forsyth
University of Illinois
e-mail: daf@illinois.edu