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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 10 • Date Oct 1993

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Displaying Results 1 - 12 of 12
  • Hierarchical decomposition and axial shape description

    Publication Year: 1993, Page(s):973 - 981
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    A method for producing a segmented axial description of a given shape together with a hierarchical decomposition of the shape into its parts is presented. The novelty of this approach lies in the combination of several competing approaches and tools into a unified scheme and an efficient implementation producing natural descriptions. Smooth local symmetries are used for the axial description of pa... View full abstract»

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  • Direct gray-scale extraction of features for character recognition

    Publication Year: 1993, Page(s):1053 - 1067
    Cited by:  Papers (77)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1452 KB)

    A method for feature extraction directly from gray-scale images of scanned documents without the usual step of binarization is presented. This approach eliminates binarization by extracting features directly from gray-scale images. In this method, a digitized gray-scale image is treated as a noisy sampling of the underlying continuous surface and desired features are obtained by extracting and ass... View full abstract»

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  • Determining the axis of a surface of revolution using tactile sensing

    Publication Year: 1993, Page(s):1079 - 1087
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    Dextrous robot hands need to be able to determine the pose of objects to reliably grasp and manipulate them. The first contacts with an object can be used to provide an initial estimate of this information if the object is constrained to be of a particular class. The authors consider a simple example of exploiting class constraints: finding the axis of an unknown surface of revolution. Three tacti... View full abstract»

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  • Effective scale: a natural unit for measuring scale-space lifetime

    Publication Year: 1993, Page(s):1068 - 1074
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A manner in which a notion of effective scale can be introduced in a formal way is developed. For continuous signals, a scaling argument directly gives a natural unit for measuring scale-space lifetime in terms of the logarithm of the ordinary scale parameter. That approach is, however, not appropriate for discrete signals since an infinite lifetime would be assigned to structures existing in the ... View full abstract»

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  • On the calculation of fractal features from images

    Publication Year: 1993, Page(s):1087 - 1090
    Cited by:  Papers (35)  |  Patents (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Fractal geometry is becoming increasingly more important in the study of image characteristics. There are numerous methods available to estimate parameters from images of fractal surfaces. A very general technique to calculate numerous fractal features involves the estimation of the mass density function by box counting. The authors analyze the box-counting method, establish a lower bound for the ... View full abstract»

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  • Probabilistic analysis of regularization

    Publication Year: 1993, Page(s):982 - 995
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    In order to use interpolated data wisely, it is important to have reliability and confidence measures associated with it. A method for computing the reliability at each point of any linear functional of a surface reconstructed using regularization is presented. The proposed method is to define a probability structure on the class of possible objects and compute the variance of the corresponding ra... View full abstract»

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  • Local surface shape estimation of 3-D textured surfaces using Gaussian Markov random fields and stereo windows

    Publication Year: 1993, Page(s):1091 - 1098
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The problem of extracting the local shape information of a 3-D texture surface from a single 2-D image by tracking the perceived systematic deformations the texture undergoes by virtue of being present on a 3-D surface and by virtue of being imaged is examined. The surfaces of interest are planar and developable surfaces. The textured objects are viewed as originating by laying a rubber planar she... View full abstract»

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  • Face recognition: features versus templates

    Publication Year: 1993, Page(s):1042 - 1052
    Cited by:  Papers (664)  |  Patents (45)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1236 KB)

    Two new algorithms for computer recognition of human faces, one based on the computation of a set of geometrical features, such as nose width and length, mouth position, and chin shape, and the second based on almost-gray-level template matching, are presented. The results obtained for the testing sets show about 90% correct recognition using geometrical features and perfect recognition using temp... View full abstract»

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  • On functionals with greyvalue-controlled smoothness terms for determining optical flow

    Publication Year: 1993, Page(s):1074 - 1079
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The modification by H.H. Nagel (1987) of the approach developed by B.K.P. Horn and B.G. Schunck (1981) for determining optical flow is generalized to the case where local motion information is given by more than one constraint equation. Applying this scheme to three constraint equations reported in the literature, as a special case, a generalization of Nagel's approach is obtained. An existence an... View full abstract»

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  • Inferring correlation between database queries: analysis of protein sequence patterns

    Publication Year: 1993, Page(s):1030 - 1041
    Cited by:  Papers (1)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1036 KB)

    Given a subset P of a database, the problem of finding the query φ in a given database attribute having the closest extension to P is addressed. In the particular case that is outlined, P is the set of protein sequences in a protein sequence database matching a given protein sequence pattern, whereas φ is a query in the annotation of the database. Ideally, φ ... View full abstract»

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  • Active stereo: integrating disparity, vergence, focus, aperture and calibration for surface estimation

    Publication Year: 1993, Page(s):1007 - 1029
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2568 KB)

    An approach to integrating stereo disparity, camera vergence, and lens focus to exploit their complementary strengths and weaknesses through active control of camera focus and orientations is presented. In addition, the aperture and zoom settings of the cameras are controlled. The result is an active vision system that dynamically and cooperatively interleaves image acquisition with surface estima... View full abstract»

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  • Image representation via a finite Radon transform

    Publication Year: 1993, Page(s):996 - 1006
    Cited by:  Papers (40)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    A model of finite Radon transforms composed of Radon projections is presented. The model generalizes to finite group projections in the classical Radon transform theory. The Radon projector averages a function on a group over cosets of a subgroup. Reconstruction formulae that were formally similar to the convolved backprojection ones are derived, and an iterative reconstruction technique is found ... 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