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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 7 • July 1999

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Displaying Results 1 - 11 of 11
  • Structure recovery with multiple cameras from scaled orthographic and perspective views

    Publication Year: 1999, Page(s):628 - 633
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) |  Multimedia Media

    This paper presents a novel framework for Euclidean structure recovery utilizing a scaled orthographic view and perspective views simultaneously. A scaled orthographic view is introduced in order to automatically obtain camera parameters such as camera positions, orientation, and focal length. Scaled orthographic properties enable all camera parameters to be calculated implicitly and perspective p... View full abstract»

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  • Image thresholding by indicator kriging

    Publication Year: 1999, Page(s):590 - 602
    Cited by:  Papers (158)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2432 KB)

    We consider the problem of segmenting a digitized image consisting of two univariate populations. Assume a priori knowledge allows incomplete assignment of voxels in the image, in the sense that a fraction of the voxels can be identified as belonging to population II 0, a second fraction to II1, and the remaining fraction have no a priori identification. Based upon estimates ... View full abstract»

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  • An experimental study of projective structure from motion

    Publication Year: 1999, Page(s):665 - 671
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    We describe an essentially algorithm-independent experimental comparison of projective versus Euclidean reconstruction. The Euclidean approach is as accurate as the projective one, even with significant calibration error and for the pure projective structure. Projective optimization has less of a local-minima problem than its Euclidean equivalent. We describe techniques that enhance the convergenc... View full abstract»

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  • Lower bounds for Bayes error estimation

    Publication Year: 1999, Page(s):643 - 645
    Cited by:  Papers (22)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    We give a short proof of the following result. Let (X,Y) be any distribution on N×{0,1}, and let (X1,Y1),...,(Xn,Yn) be an i.i.d. sample drawn from this distribution. In discrimination, the Bayes error L*=infgP{g(X)≠Y} is of crucial importance. Here we show that without further conditions on the distribution of (X,Y), no rate-of-conve... View full abstract»

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  • An MRF model-based approach to simultaneous recovery of depth and restoration from defocused images

    Publication Year: 1999, Page(s):577 - 589
    Cited by:  Papers (51)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    In this paper, we propose a MAP-Markov random field (MRF) based scheme for recovering the depth and the focused image of a scene from two defocused images. The space-variant blur parameter and the focused image of the scene are both modeled as MRFs and their MAP estimates are obtained using simulated annealing. The scheme is amenable to the incorporation of smoothness constraints on the spatial va... View full abstract»

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  • Fuzzy relative position between objects in image processing: a morphological approach

    Publication Year: 1999, Page(s):657 - 664
    Cited by:  Papers (76)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    In order to cope with the ambiguity of spatial relative position concepts, we propose a new definition of the relative position between two objects in a fuzzy set framework. This definition is based on a morphological and fuzzy pattern-matching approach, and consists of comparing an object to a fuzzy landscape representing the degree of satisfaction of a directional relationship to a reference obj... View full abstract»

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  • A new way to represent the relative position between areal objects

    Publication Year: 1999, Page(s):634 - 643
    Cited by:  Papers (102)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    The fuzzy qualitative evaluation of directional spatial relationships (such as “to the right of”, “to the south of...”) between areal objects often relies on the computation of a histogram of angles, which is considered to provide a good representation of the relative position of an object with regard to another. In this paper, the notion of the histogram of forces is intro... View full abstract»

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  • Recognition of articulated and occluded objects

    Publication Year: 1999, Page(s):603 - 613
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    A model-based automatic target recognition system is developed to recognize articulated and occluded objects in synthetic aperture radar (SAR) images, based on invariant features of the objects. Characteristics of SAR target image scattering centers, azimuth variation, and articulation invariants are presented. The basic elements of the new recognition system are described and performance results ... View full abstract»

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  • A new one-parametric fitting method for planar objects

    Publication Year: 1999, Page(s):646 - 651
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper is an extension of the already published paper by Voss and Suesse (1997). We developed a new region-based fitting method using the method of normalization. There we demonstrated the zero-parametric fitting of lines, triangles, parallelograms, circles, and ellipses. We discuss this normalization idea for fitting of closed regions using circular segments, elliptical segments, and super-el... View full abstract»

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  • Pattern matching image compression: algorithmic and empirical results

    Publication Year: 1999, Page(s):614 - 627
    Cited by:  Papers (23)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    We propose a non-transform image compression scheme based on approximate 1D pattern matching, called pattern matching image compression (PMIC). The main idea behind it is a lossy extension of the Lempel-Ziv data compression scheme in which one searches for the longest prefix of an uncompressed image that approximately occurs in the already processed image. This main algorithm is enhanced with seve... View full abstract»

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  • A method to detect and characterize ellipses using the Hough transform

    Publication Year: 1999, Page(s):652 - 657
    Cited by:  Papers (35)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    We describe a new technique for detecting and characterizing ellipsoidal shapes automatically from any type of image. This technique is a single pass algorithm which can extract any group of ellipse parameters or characteristics which can be computed from those parameters without having to detect all five parameters for each ellipsoidal shape. Moreover, the method can explicitly incorporate any a ... 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.

Full Aims & Scope

Meet Our Editors

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