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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 1 • Date Jan 1993

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Displaying Results 1 - 7 of 7
  • Direct estimation of range flow on deformable shape from a video rate range camera

    Publication Year: 1993, Page(s):82 - 89
    Cited by:  Papers (27)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (796 KB)

    A method of estimating range flow (space displacement vector field) on nonrigid as well as rigid objects from a sequence of range images is described. This method can directly estimate the deformable motion parameters by solving a system of linear equations that are obtained from substituting a linear transformation of nonrigid objects expressed by the Jacobian matrix into motion constraints based... View full abstract»

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  • Perception of 3-D surfaces from 2-D contours

    Publication Year: 1993, Page(s):3 - 18
    Cited by:  Papers (25)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1480 KB)

    Inference of 3-D shape from 2-D contours in a single image is an important problem in machine vision. The authors survey classes of techniques proposed in the past and provide a critical analysis. They show that two kinds of symmetries in figures, which are known as parallel and skew symmetries, give significant information about surface shape for a variety of objects. They derive the constraints ... View full abstract»

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  • Efficient parallel processing of image contours

    Publication Year: 1993, Page(s):69 - 81
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1292 KB)

    Describes two parallel algorithms for ranking the pixels on a curve in O (log N) time using either an EREW or CREW PRAM model. The algorithms accomplish this with N processors for a √N×√N image. After applying such an algorithm to an image, it is possible to move the pixels from a curve into processors having consecutive addresses. Thi... View full abstract»

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  • View variation of point-set and line-segment features

    Publication Year: 1993, Page(s):51 - 68
    Cited by:  Papers (69)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1564 KB)

    The variation, with respect to view, of 2D features defined for projections of 3D point sets and line segments is studied. It is established that general-case view-invariants do not exist for any number of points, given true perspective, weak perspective, or orthographic projection models. Feature variation under the weak perspective approximation is then addressed. Though there are no general-cas... View full abstract»

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  • Threshold validity for mutual neighborhood clustering

    Publication Year: 1993, Page(s):89 - 92
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Clustering algorithms have the annoying characteristic of finding clusters in random data. A theoretical analysis of the threshold of the mutual neighborhood clustering algorithm (MNCA) under the hypothesis of random data is presented. This yields a theoretical minimum value of this threshold below which even unclustered data are broken into separate clusters. To derive the threshold, a theorem ab... View full abstract»

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  • Generic object recognition: building and matching coarse descriptions from line drawings

    Publication Year: 1993, Page(s):19 - 36
    Cited by:  Papers (75)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1772 KB)

    Primal access recognition of visual objects (PARVO), a computer vision system that addresses the problem of fast and generic recognition of unexpected 3D objects from single 2D views, is considered. Recently, recognition by components (RBC), which is a new human image understanding theory, based on some psychological results, has been proposed as an explanation of how PARVO works. However, no syst... View full abstract»

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  • Unbiased estimation and statistical analysis of 3-D rigid motion from two views

    Publication Year: 1993, Page(s):37 - 50
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The problem of estimating 3D rigid motion from point correspondences over two views is formulated as nonlinear least-squares (LS) optimization, and the statistical behaviors of the errors in the solution are analyzed by introducing a realistic model of noise described in terms of the covariance matrices of N-vectors. It is shown that the LS solution based on the epipolar constraint is statisticall... 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