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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 3 • Date Mar 1996

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Displaying Results 1 - 13 of 13
  • Object matching using deformable templates

    Publication Year: 1996, Page(s):267 - 278
    Cited by:  Papers (209)  |  Patents (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2004 KB)

    We propose a general object localization and retrieval scheme based on object shape using deformable templates. Prior knowledge of an object shape is described by a prototype template which consists of the representative contour/edges, and a set of probabilistic deformation transformations on the template. A Bayesian scheme, which is based on this prior knowledge and the edge information in the in... View full abstract»

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  • Iterative smoothed residuals: a low-pass filter for smoothing with controlled shrinkage

    Publication Year: 1996, Page(s):334 - 337
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    We present a linear smoothing operator which has low-pass characteristics similar to a Butterworth filter and limited spatial extent similar to a Gaussian. The smoothing operator also has closed forms in the spatial and frequency domains which facilitate analysis and implementation. A formula is derived that allows us to explicitly control shrinkage View full abstract»

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  • A new image motion estimation algorithm based on the EM technique

    Publication Year: 1996, Page(s):348 - 352
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    This paper focuses on the presentation and implementation of a new iterative algorithm for image motion coefficient estimation from noisy measurements based on the expectation-maximization (EM) technique. We also compare this algorithm with two other robust iterative algorithms. We represent the motion field by a (unitary) series expansion to obtain the motion coefficients, and show this character... View full abstract»

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  • Three-dimensional descriptions based on the analysis of the invariant and quasi-invariant properties of some curved-axis generalized cylinders

    Publication Year: 1996, Page(s):237 - 253
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1836 KB)

    We address the recovery of object-level 3D descriptions of some classes of curved-axis generalized cylinders. For this, the first part of the paper analyzes the projective properties of two common generic shapes, planar right constant generalized cylinders (PRCGCs) and circular planar right generalized cylinders (circular PRGCs). The properties we analyze include new geometric invariant and quasi-... View full abstract»

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  • Graphical templates for model registration

    Publication Year: 1996, Page(s):225 - 236
    Cited by:  Papers (55)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2480 KB)

    A new method of model registration is proposed using graphical templates. A graph of landmarks is chosen in the template image. All possible candidates for these landmarks are found in the data image using local operators. A dynamic programming algorithm on decomposable subgraphs of the template graph finds the optimal match to a subset of the candidate points in polynomial time. This combination ... View full abstract»

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  • An improved power cepstrum based stereo correspondence method for textured scenes

    Publication Year: 1996, Page(s):338 - 348
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    This paper analyses the performance of cepstral approaches for solving the stereo correspondence problem. A quantitative analysis of the effects of noise, foreshortening differences, and photometric variations on existing cepstral correspondence techniques is presented. A modified approach that is less sensitive to these effects is developed for textured scenes, and analytical arguments for its ro... View full abstract»

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  • Implicit simplicial models for adaptive curve reconstruction

    Publication Year: 1996, Page(s):321 - 325
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Parametric deformable models have been extensively and very successfully used for reconstructing free-form curves and surfaces, and for tracking nonrigid deformations, but they require previous knowledge of the topological type of the data, and good initial curve or surface estimates. With deformable models, it is also computationally expensive to check for and to prevent self-intersections while ... View full abstract»

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  • On image analysis by moments

    Publication Year: 1996, Page(s):254 - 266
    Cited by:  Papers (183)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1108 KB)

    Research has been performed investigating the use of moments for pattern recognition in recent years. The basic problem of the influence of discretization and noise on moment accuracy as object descriptors, has been barely investigated. In this paper, the detailed error analysis involved in the moment method is discussed. Several new techniques to increase the accuracy and efficiency of moment des... View full abstract»

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  • The space requirements of indexing under perspective projections

    Publication Year: 1996, Page(s):330 - 333
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Object recognition systems can be made more efficient through the use of table lookup to match features. The cost of this indexing process depends on the space required to represent groups of model features in such a lookup table. We determine the space required to perform indexing of arbitrary sets of 3D model points for lookup from a single 2D image formed under perspective projection. We show t... View full abstract»

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  • Scaling theorems for zero crossings of bandlimited signals

    Publication Year: 1996, Page(s):309 - 320
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    Scale-space filtering is the only known method which provides a hierarchic signal description method by extracting features across a continuum of scales. One of its important characteristics is that it demands the filtering involved does not create generic features as the scale increases. It has been shown that the Gaussian filter is unique in holding this remarkable property. This is in essence t... View full abstract»

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  • Parameter estimation in Markov random field contextual models using geometric models of objects

    Publication Year: 1996, Page(s):326 - 329
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    We present a new scheme for the estimation of Markov random field line process parameters which uses geometric CAD models of the objects in the scene. The models are used to generate synthetic images of the objects from random view points. The edge maps computed from the synthesized images are used as training samples to estimate the line process parameters using a least squares method. We show th... View full abstract»

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  • Vehicle segmentation and classification using deformable templates

    Publication Year: 1996, Page(s):293 - 308
    Cited by:  Papers (86)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4580 KB)

    This paper proposes a segmentation algorithm using deformable template models to segment a vehicle of interest both from the stationary complex background and other moving vehicles in an image sequence. We define a polygonal template to characterize a general model of a vehicle and derive a prior probability density function to constrain the template to be deformed within a set of allowed shapes. ... View full abstract»

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  • Computing occlusion-free viewpoints

    Publication Year: 1996, Page(s):279 - 292
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1788 KB)

    This paper presents methods to compute the locus of all viewpoints from which features on known polyhedral objects can be viewed in their entirety without being occluded by anything in the environment. Convex and concave polyhedra with or without holes and the viewing model of perspective projection are employed in this work. Initially, properties of the occlusion-free and occluded loci of viewpoi... 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