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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 12 • Date Dec 1992

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Displaying Results 1 - 10 of 10
  • Separability of spatiotemporal spectra of image sequences

    Publication Year: 1992, Page(s):1210 - 1213
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    The authors calculate the spatiotemporal power spectrum of 14 image sequences in order to determine the degree to which the spectra are separable in space and time and to assess the validity of the commonly used exponential correlation model. They expand the spectrum by a singular value decomposition into a sum of separable terms and define an index of spatiotemporal separability. as the fraction ... View full abstract»

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  • The canonical coordinates method for pattern deformation: theoretical and computational considerations

    Publication Year: 1992, Page(s):1171 - 1183
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1492 KB)

    A method for the analysis of deformed patterns is presented and analyzed. The image is transformed into a new set of coordinates in which the deformation has a particular simple form. A number of deformations are considered. The practical implementation of the method is discussed. Similar aspects of biological vision are also considered View full abstract»

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  • Interpretation of motion trajectories using focus of expansion

    Publication Year: 1992, Page(s):1205 - 1210
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The focus of expansion (FOE) of a group of motion trajectories is defined to be a point in the image plane at which the trajectories intersect when they are extended. The FOE observed over a time sequence defines the locus of the FOE. The authors present an analytical approach for the study of dynamic events as they project on the image plane by analyzing the locus of the FOE. They find that the l... View full abstract»

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  • Serial and parallel algorithms for the medial axis transform

    Publication Year: 1992, Page(s):1218 - 1224
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    An O(n2) time serial algorithm is developed for obtaining the medial axis transform (MAT) of an n×n image. An O(log n) time CREW PRAM algorithm and an O(log2 n) time SIMD hypercube parallel algorithm for the MAT are also developed. Both of these use O(n2) processors. Two... View full abstract»

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  • The multiple window parameter transform

    Publication Year: 1992, Page(s):1157 - 1170
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    The multiwindow transform, an extension of parameter transform techniques that increase performance and scope by exploiting the long-range correlated information contained in multiple portions of an image, is presented. Multiple-window transforms allow the extraction of high-dimensional features with improvement in accuracy over conventional techniques while keeping linear to low-order-polynomial ... View full abstract»

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  • Structural indexing: efficient 2D object recognition

    Publication Year: 1992, Page(s):1198 - 1204
    Cited by:  Papers (30)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    The problem of recognition of multiple flat objects in a cluttered environment from an arbitrary viewpoint is addressed. The models are acquired automatically and approximated by polygons with multiple line tolerances for robustness. Groups of consecutive segments (super segments) are then encoded and entered into a table. This provides the essential mechanism for indexing and fast retrieval. Once... View full abstract»

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  • Encoded moire inspection based on a computer solid model

    Publication Year: 1992, Page(s):1214 - 1218
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    An investigation into a system linking a computer solid modeler to an active stereo imaging inspection station is presented. Given the computer solid model of a surface, a projected pattern can be encoded so that the reflections from the object's surface exhibit a uniformly simple pattern when the object's surface and the modeled surface are identical. Research concerning the method of generating ... View full abstract»

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  • Dynamic stereo with self-calibration

    Publication Year: 1992, Page(s):1184 - 1189
    Cited by:  Papers (14)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    An approach for incremental refinement of disparity maps obtained from a dynamic stereo sequence of a static scene is presented. The approach has been implemented using a binocular stereo vision system mounted on a mobile robot. A robust least median of squares based algorithm is given for recovering the camera motion between successive viewpoints, which provides a self-calibration mechanism. The ... View full abstract»

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  • Estimation of displacements from two 3D frames obtained from stereo

    Publication Year: 1992, Page(s):1141 - 1156
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    A method for estimating 3D displacements from two stereo frames is presented. It is based on the hypothesize-and-verify paradigm used to match 3D line segments between the two frames. In order to reduce the complexity of the method, an assumption is made that objects are rigid. The formulate a set of complete rigidity constraints for 3D line segments and integrate the uncertainty of measurements i... View full abstract»

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  • Optimal generating kernels for image pyramids by piecewise fitting

    Publication Year: 1992, Page(s):1190 - 1198
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A novel class of generating kernels for image pyramids is introduced. When these kernels are convolved with intensity functions of images, continuous piecewise surfaces composed of polynomial tensor products are fitted to the intensity functions. The fittings are optimal in the sense that the mean square error between them and the original intensity functions is minimized. Two members of the class... 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