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IEEE Transactions on Pattern Analysis and Machine Intelligence

Issue 6 • Date Jun 1990

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Displaying Results 1 - 10 of 10
  • Character scaling by contour method

    Publication Year: 1990, Page(s):600 - 606
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Advancement in digital-image processing hardware has given the printing industry novel facilities for capturing fonts and has provided new grounds for character scaling, which is an important issue in typesetting and graphical text. An algorithm for digital character scaling by a contour method is developed and implemented. The algorithm is based on scaling the contour of the character through a t... View full abstract»

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  • Modified matched filter for cloud clutter suppression

    Publication Year: 1990, Page(s):594 - 600
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The least-mean-square (LMS) filter has been developed as an alternative to the classical matched filter (MF) to address the clutter-spectrum issue. However, the output of the MF and the LMS processes is dependent on the scene energy and marginally dependent on the filter signal shape. An approach referred to as the modified matched filter (MMF) is presented. The MMF is a product of the LMS filter ... View full abstract»

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  • Analysis of thinning algorithms using mathematical morphology

    Publication Year: 1990, Page(s):541 - 551
    Cited by:  Papers (32)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A precise definition of digital skeletons and a mathematical framework for the analysis of a class of thinning algorithms, based on morphological set transformation, are presented. A particular thinning algorithm (algorithm A) is used as an example in the analysis. Precise definitions and analyses associated with the thinning process are presented, including the proof of convergence, the condition... View full abstract»

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  • Surface orientation from projective foreshortening of isotropic texture autocorrelation

    Publication Year: 1990, Page(s):584 - 588
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    A method for determining local surface orientation from the autocorrelation function of statistically isotropic textures is introduced. It relies on the foreshortening that occurs in the image of an oriented surface, and the analogous foreshortening produced in the texture-autocorrelation function. This method assumes textural isotropy, but does not require the texture to be composed of texels or ... View full abstract»

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  • Fast surface interpolation using hierarchical basis functions

    Publication Year: 1990, Page(s):513 - 528
    Cited by:  Papers (95)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1324 KB)

    An alternative to multigrid relaxation that is much easier to implement and more generally applicable is presented. Conjugate gradient descent is used in conjunction with a hierarchical (multiresolution) set of basis functions. The resultant algorithm uses a pyramid to smooth the residual vector before the direction is computed. Simulation results showing the speed of convergence and its dependenc... View full abstract»

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  • Reading chess

    Publication Year: 1990, Page(s):552 - 559
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    By applying semantic analysis to images of extended passages of text, several volumes of a chess encyclopedia have been read with high accuracy. Although carefully proofread, the books were poorly printed and posed a severe challenge to conventional page-layout analysis and character-recognition methods. An experimental page-reader system performed strictly top-down layout analysis for identificat... View full abstract»

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  • Image seaming for segmentation on parallel architecture

    Publication Year: 1990, Page(s):588 - 594
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    Some basic problems encountered when assembling the results of image analysis on architectures with coarse parallelism are discussed. The emphasis is on strategies that minimize the distortion in the final result caused by processing image tiles independently. Methods are presented that can be used to reduce the disparity between the results of processing each title independently and processing ea... View full abstract»

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  • A multiresolution hierarchical approach to image segmentation based on intensity extrema

    Publication Year: 1990, Page(s):529 - 540
    Cited by:  Papers (94)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    A computer algorithm which segments gray-scale images into regions of interest (objects) has been developed. These regions can provide the basis for scene analysis (including shape-parameter calculation) or surface-based, shaded-graphics display. The algorithm creates a tree structure for image description by defining a linking relationship between pixels in successively blurred versions of the in... View full abstract»

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  • Differentiating sonar reflections from corners and planes by employing an intelligent sensor

    Publication Year: 1990, Page(s):560 - 569
    Cited by:  Papers (113)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    A multitransducer, pulse/echo-ranging system is described that differentiates corner and plane reflectors by exploiting the physical properties of sound propagation. The amplitudes and ranges of reflected signals for the different transmitter and receiver pairs are processed to determine whether the reflecting object is a plane or a right-angle corner. In addition, the angle of inclination of the ... View full abstract»

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  • A cache-based natural language model for speech recognition

    Publication Year: 1990, Page(s):570 - 583
    Cited by:  Papers (131)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1284 KB)

    Speech-recognition systems must often decide between competing ways of breaking up the acoustic input into strings of words. Since the possible strings may be acoustically similar, a language model is required; given a word string, the model returns its linguistic probability. Several Markov language models are discussed. A novel kind of language model which reflects short-term patterns of word us... 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