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Image Processing, IEEE Transactions on

Issue 4 • Date Oct 1992

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Displaying Results 1 - 11 of 11
  • Nonuniform image motion estimation using the maximum a posteriori principle

    Publication Year: 1992 , Page(s): 520 - 525
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1020 KB)  

    An iterative scheme for frame-to-frame motion estimation from a pair of noisy images is established. The algorithm is developed by assuming that the Karhunen-Loeve coefficients of the motion vector waveform are zero mean and Gaussian random variables. Following the derivation of the generalized maximum likelihood (GML) algorithm, and invoking the maximum a posteriori (MAP) criterion, an iterative ... View full abstract»

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  • A full-plane block Kalman filter for image restoration

    Publication Year: 1992 , Page(s): 488 - 495
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1044 KB)  

    A two-dimensional method which uses a full-plane image model to generate a more accurate filtered estimate of an image that has been corrupted by additive noise and full-plane blur is presented. Causality is maintained within the filtering process by using multiple concurrent block estimators. In addition, true state dynamics are preserved, resulting in an accurate Kalman gain matrix. Simulation r... View full abstract»

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  • Efficient multiframe Wiener restoration of blurred and noisy image sequences

    Publication Year: 1992 , Page(s): 453 - 476
    Cited by:  Papers (43)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2688 KB)  

    Computationally efficient multiframe Wiener filtering algorithms that account for both intraframe (spatial) and interframe (temporal) correlations are proposed for restoring image sequences that are degraded by both blur and noise. One is a general computationally efficient multiframe filter, the cross-correlated multiframe (CCMF) Wiener filter, which directly utilizes the power and cross power sp... View full abstract»

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  • Generalized block coding of black and white images

    Publication Year: 1992 , Page(s): 518 - 520
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (240 KB)  

    A generalized approach to block coding of two-tone images is introduced. Binary N-sequences (blocks) are described. Various conventional block coding techniques are shown to be particular cases of this approach. Numerical examples confirm that, based on the approach, the coding technique outperforms existing techniques. Generalized block coding is proved to be near optimum for encoding sp... View full abstract»

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  • Maximum likelihood parametric blur identification based on a continuous spatial domain model

    Publication Year: 1992 , Page(s): 496 - 504
    Cited by:  Papers (41)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (644 KB)  

    A formulation for maximum-likelihood (ML) blur identification based on parametric modeling of the blur in the continuous spatial coordinates is proposed. Unlike previous ML blur identification methods based on discrete spatial domain blur models, this formulation makes it possible to find the ML estimate of the extent, as well as other parameters, of arbitrary point spread functions that admit a c... View full abstract»

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  • Hidden Markov models for character recognition

    Publication Year: 1992 , Page(s): 539 - 543
    Cited by:  Papers (14)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (512 KB)  

    A hierarchical system for character recognition with hidden Markov model knowledge sources which solve both the context sensitivity problem and the character instantiation problem is presented. The system achieves 97-99% accuracy using a two-level architecture and has been implemented using a systolic array, thus permitting real-time (1 ms per character) multifont and multisize printed character r... View full abstract»

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  • Generalized multistage median filters

    Publication Year: 1992 , Page(s): 543 - 545
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (188 KB)  

    As an extension of the multistage median filters, a class of r -filters is presented. Some properties of these filters are discussed. It is shown that the filters can smooth noise and preserve details of images efficiently View full abstract»

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  • An adaptive morphological filter for image processing

    Publication Year: 1992 , Page(s): 533 - 539
    Cited by:  Papers (34)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1060 KB)  

    Novel types of opening operator (NOP) and closing operator (NCP) are proposed. An adaptive morphological filter is then constructed on the basis of the NOP and NCP. The filter can remove any details consisting of fewer pixels than a given number N, while preserving the other details. Efficient algorithms are also developed for the implementation of the NOP and NCP View full abstract»

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  • Convolution backprojection image reconstruction for spotlight mode synthetic aperture radar

    Publication Year: 1992 , Page(s): 505 - 517
    Cited by:  Papers (74)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1216 KB)  

    Convolution backprojection (CBP) image reconstruction has been proposed as a means of producing high-resolution synthetic-aperture radar (SAR) images by processing data directly in the polar recording format which is the conventional recording format for spotlight mode SAR. The CBP algorithm filters each projection as it is recorded and then backprojects the ensemble of filtered projections to cre... View full abstract»

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  • Vector quantization for entropy coding of image subbands

    Publication Year: 1992 , Page(s): 526 - 533
    Cited by:  Papers (45)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1132 KB)  

    Vector quantization for entropy coding of image subbands is investigated. Rate distortion curves are computed with mean square error as a distortion criterion. The authors show that full-search entropy-constrained vector quantization of image subbands results in the best performance, but is computationally expensive. Lattice quantizers yield a coding efficiency almost indistinguishable from optimu... View full abstract»

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  • Prioritized DCT for compression and progressive transmission of images

    Publication Year: 1992 , Page(s): 477 - 487
    Cited by:  Papers (28)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1256 KB)  

    An approach is based on the block discrete cosine transform (DCT). The novelty of this approach is that the transform coefficients of all image blocks are coded and transmitted in absolute magnitude order. The resulting ordered-by-magnitude transmission is accomplished without sacrificing coding efficiency by using partition priority coding. Coding and transmission are adaptive to the characterist... View full abstract»

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Aims & Scope

IEEE Transactions on Image Processing focuses on signal-processing aspects of image processing, imaging systems, and image scanning, display, and printing.

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Meet Our Editors

Editor-in-Chief
Scott Acton
University of Virginia
Charlottesville, VA, USA
E-mail: acton@virginia.edu 
Phone: +1 434-982-2003