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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 4 • Date Apr 1994

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Displaying Results 1 - 13 of 13
  • Modeling edges at subpixel accuracy using the local energy approach

    Publication Year: 1994, Page(s):405 - 410
    Cited by:  Papers (16)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    In this paper we describe a new technique for ID and 2D edge feature extraction to subpixel accuracy using edge models and the local energy approach. A candidate edge is modeled as one of a number of parametric edge models, and the fit is refined by a least-squared error fitting technique View full abstract»

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  • Multidimensional indexing for recognizing visual shapes

    Publication Year: 1994, Page(s):373 - 392
    Cited by:  Papers (80)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1776 KB)

    This paper introduces an analytical framework for studying some properties of model acquisition and recognition techniques based on indexing. The goal is to demonstrate that several problems previously associated with the approach can be attributed to the low dimensionality of invariants used. These include limited index selectivity. Excessive accumulation of votes in the look-up table buckets, an... View full abstract»

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  • Morphological filtering as template matching

    Publication Year: 1994, Page(s):438 - 443
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    Binary morphological operations with single and multiple structuring elements are implemented using look-up table (LUT) driven templates. Many complex operations can be implemented in one pipeline processing cycle for 3*3 regions of support and in four or five cycles for 5*5 regions of support. The basis representation of the operations is used to specify the required templates View full abstract»

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  • Hypothesis testing: a framework for analyzing and optimizing Hough transform performance

    Publication Year: 1994, Page(s):329 - 341
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    In this paper a formal, quantitative approach to designing optimum Hough transform (HT) algorithms is proposed. This approach takes the view that a HT is a hypothesis testing method. Each sample in the HT array implements a test to determine whether a curve with the given parameters fits the edge point data. This view allows the performance of HT algorithms to be quantified. The power function, wh... View full abstract»

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  • Interpolation using wavelet bases

    Publication Year: 1994, Page(s):410 - 414
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    Efficient solutions to regularization problems can be obtained using orthogonal wavelet bases for preconditioning. Good approximate solutions can be obtained in only two or three iterations, with each iteration requiring only O(n) operations and O(n) storage locations. Two- and three-dimensional examples are shown using both synthetic and real range data View full abstract»

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  • A shape analysis model with applications to a character recognition system

    Publication Year: 1994, Page(s):393 - 404
    Cited by:  Papers (81)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    A method for the recognition of multifont printed characters is proposed, giving emphasis to the identification of structural descriptions of character shapes using prototypes. Noise and shape variations are modeled as series of transformations from groups of features in the data to features in each prototype. Thus, the method manages systematically the relative distortion between a candidate shap... View full abstract»

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  • A Euclidean distance transform using grayscale morphology decomposition

    Publication Year: 1994, Page(s):443 - 448
    Cited by:  Papers (47)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    A fast and exact Euclidean distance transformation using decomposed grayscale morphological operators is presented. Applied on a binary image, a distance transformation assigns each object pixel a value that corresponds to the shortest distance between the object pixel and the background pixels. It is shown that the large structuring element required for the Euclidean distance transformation can b... View full abstract»

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  • Modeling, analysis, and visualization of left ventricle shape and motion by hierarchical decomposition

    Publication Year: 1994, Page(s):342 - 356
    Cited by:  Papers (42)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1560 KB)

    This paper presents an approach to the modeling, analysis, and visualization of left ventricle motion and deformation. The authors' modeling of left ventricle shape and motion as a hierarchical representation enables them to develop a promising noninvasive technique for monitoring heart dynamics where both image analysis and image synthesis are involved. The proposed hierarchical motion model of l... View full abstract»

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  • Advanced in-plane rotation-invariant correlation filters

    Publication Year: 1994, Page(s):415 - 420
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Advanced correlation filter synthesis algorithms to achieve rotation invariance are described. We use a specified form for the filter as the rotation invariance constraint and derive a general closed-form solution for a multiclass rotation-invariant filter that can recognize a number of different objects. By requiring the filter to minimize the average correlation plane energy, we produce a multic... View full abstract»

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  • Integrated 3-D analysis and analysis-guided synthesis of flight image sequences

    Publication Year: 1994, Page(s):357 - 372
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1444 KB)

    This paper is concerned with three-dimensional (3D) analysis, and analysis-guided syntheses, of images showing 3-D motion of an observer relative to a scene. There are two objectives of the paper. First, it presents an approach to recovering 3D motion and structure parameters from multiple cues present in a monocular image sequence, such as point features, optical flow, regions, lines, texture gra... View full abstract»

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  • Toward Bayes-optimal linear dimension reduction

    Publication Year: 1994, Page(s):420 - 424
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (532 KB)

    Dimension reduction is the process of transforming multidimensional vectors into a low-dimensional space. In pattern recognition, it is often desired that this task be performed without significant loss of classification information. The Bayes error is an ideal criterion for this purpose; however, it is known to be notoriously difficult for mathematical treatment. Consequently, suboptimal criteria... View full abstract»

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  • On a parameter estimation method for Gibbs-Markov random fields

    Publication Year: 1994, Page(s):424 - 430
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB)

    This correspondence is about a Gibbs-Markov random field (GMRF) parameter estimation technique proposed by Derin and Elliott (1987). We will refer to this technique as the histogramming (H) method. First, the relation of the H method to the (conditional) maximum likelihood method is considered. Second, a bias-reduction based modification of the H method is proposed to improve its performance, espe... View full abstract»

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  • Contribution to the determination of vanishing points using Hough transform

    Publication Year: 1994, Page(s):430 - 438
    Cited by:  Papers (39)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    We propose a method to locate three vanishing points on an image, corresponding to three orthogonal directions of the scene. This method is based on two cascaded Hough transforms. We show that, even in the case of synthetic images of high quality, a naive approach may fail, essentially because of the errors due to the limitation of the image size. We take into account these errors as well as error... 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
David A. Forsyth
University of Illinois
e-mail: daf@illinois.edu