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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 11 • Date Nov. 1993

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Displaying Results 1 - 11 of 11
  • The scale space aspect graph

    Publication Year: 1993, Page(s):1114 - 1130
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1935 KB)

    Currently the aspect graph is computed from the theoretical standpoint of perfect resolution in object shape, the viewpoint and the projected image. This means that the aspect graph may include details that an observer could never see in practice. Introducing the notion of scale into the aspect graph framework provides a mechanism for selecting a level of detail that is "large enough" to merit exp... View full abstract»

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  • Isolated word recognition by neural network models with cross-correlation coefficients for speech dynamics

    Publication Year: 1993, Page(s):1174 - 1185
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    This paper presents an artificial neural network (ANN) for speaker-independent isolated word speech recognition. The network consists of three subnets in concatenation. The static information within one frame of speech signal is processed in the probabilistic mapping subnet that converts an input vector of acoustic features into a probability vector whose components are estimated probabilities of ... View full abstract»

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  • The document spectrum for page layout analysis

    Publication Year: 1993, Page(s):1162 - 1173
    Cited by:  Papers (191)  |  Patents (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1108 KB)

    Page layout analysis is a document processing technique used to determine the format of a page. This paper describes the document spectrum (or docstrum), which is a method for structural page layout analysis based on bottom-up, nearest-neighbor clustering of page components. The method yields an accurate measure of skew, within-line, and between-line spacings and locates text lines and text blocks... View full abstract»

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  • High confidence visual recognition of persons by a test of statistical independence

    Publication Year: 1993, Page(s):1148 - 1161
    Cited by:  Papers (1217)  |  Patents (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1324 KB)

    A method for rapid visual recognition of personal identity is described, based on the failure of a statistical test of independence. The most unique phenotypic feature visible in a person's face is the detailed texture of each eye's iris. The visible texture of a person's iris in a real-time video image is encoded into a compact sequence of multi-scale quadrature 2-D Gabor wavelet coefficients, wh... View full abstract»

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  • Finite-element methods for active contour models and balloons for 2-D and 3-D images

    Publication Year: 1993, Page(s):1131 - 1147
    Cited by:  Papers (735)  |  Patents (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2448 KB)

    The use of energy-minimizing curves, known as “snakes” to extract features of interest in images has been introduced by Kass, Witkin and Terzopoulos (1987). A balloon model was introduced by Cohen (1991) as a way to generalize and solve some of the problems encountered with the original method. A 3-D generalization of the balloon model as a 3-D deformable surface, which evolves in 3-D ... View full abstract»

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  • A Fourier approach to camera orientation

    Publication Year: 1993, Page(s):1197 - 1202
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Recovering camera orientation with respect to a known coordinate system is of great significance to photogrammetry and binocular stereo. In binocular stereo, the relative orientation between a camera pair may be obtained from the orientation of each camera with respect to a common frame. In this paper a Fourier technique is presented to determine the orientation of a camera with respect to a calib... View full abstract»

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  • B-spline contour representation and symmetry detection

    Publication Year: 1993, Page(s):1191 - 1197
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The detection of edges is only one of many steps in the understanding of images. Further processing necessarily involves grouping operations between contours. We present a representation of edge contours by approximating B-splines and show that such a representation facilitates the extraction of symmetries between contours. Our representation is rich, compact, stable, and does not critically depen... View full abstract»

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  • An optimal graph theoretic approach to data clustering: theory and its application to image segmentation

    Publication Year: 1993, Page(s):1101 - 1113
    Cited by:  Papers (393)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    A novel graph theoretic approach for data clustering is presented and its application to the image segmentation problem is demonstrated. The data to be clustered are represented by an undirected adjacency graph 𝒢 with arc capacities assigned to reflect the similarity between the linked vertices. Clustering is achieved by removing arcs of 𝒢 to form mutually exclusive subgraphs such that t... View full abstract»

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  • Texture classification by wavelet packet signatures

    Publication Year: 1993, Page(s):1186 - 1191
    Cited by:  Papers (452)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    This correspondence introduces a new approach to characterize textures at multiple scales. The performance of wavelet packet spaces are measured in terms of sensitivity and selectivity for the classification of twenty-five natural textures. Both energy and entropy metrics were computed for each wavelet packet and incorporated into distinct scale space representations, where each wavelet packet (ch... View full abstract»

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  • Direct estimation of shape from texture

    Publication Year: 1993, Page(s):1202 - 1208
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Witkin (1981) has proposed a maximum likelihood (ML) estimator of surface orientation based on the observed directional bias of projected texture elements. However, a drawback of this procedure is that the estimate is only defined indirectly in terms of a set of nonlinear equations. An alternative method is proposed, which allows an estimate of the surface orientation to be computed directly in a ... View full abstract»

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  • Partial smoothing splines for noisy +boundaries with corners

    Publication Year: 1993, Page(s):1208 - 1216
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    Investigates the estimation of 2-D boundary functions from sampled data sets where both noise and corners are present. The approach is based on the partial smoothing spline in which the estimated boundary function consists of an ordinary smoothing spline and a parametric function that describes the discontinuities (i.e., corners of the boundary). Prior knowledge about the boundary, such as the num... 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