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IEEE Transactions on Image Processing

Issue 7 • Date Jul 1995

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Displaying Results 1 - 17 of 17
  • Projection-based spatially adaptive reconstruction of block-transform compressed images

    Publication Year: 1995, Page(s):896 - 908
    Cited by:  Papers (157)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1416 KB)

    At the present time, block-transform coding is probably the most popular approach for image compression. For this approach, the compressed images are decoded using only the transmitted transform data. We formulate image decoding as an image recovery problem. According to this approach, the decoded image is reconstructed using not only the transmitted data but, in addition, the prior knowledge that... View full abstract»

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  • Real-time synthetic aperture sonar imaging using a parallel architecture

    Publication Year: 1995, Page(s):1010 - 1019
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    This paper describes a parallel architecture that has been developed to perform real-time synthetic aperture sonar imaging as part of the Acoustical Imaging Development (ACID) project. The project has successfully developed a synthetic aperture sonar system for producing high resolution images of the sea floor and that has been tested during a series of sea trials in May 1993 off the south coast o... View full abstract»

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  • A domain operator for binary morphological processing

    Publication Year: 1995, Page(s):1042 - 1046
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    A new class of morphological operators, the domain operator, is proposed for binary images. The operation is defined with a domain function based on the index function of fuzzy sets. With appropriate definition of the connection weights, the domain operator can implement conventional morphological operations such as dilation, erosion, opening, and closing, as well as other image processing functio... View full abstract»

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  • Comparison between adaptive search and bit allocation algorithms for image compression using vector quantization

    Publication Year: 1995, Page(s):1020 - 1023
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    This article discusses bit allocation and adaptive search algorithms for mean-residual vector quantization (MRVQ) and multistage vector quantization (MSVQ). The adaptive search algorithm uses a buffer and a distortion threshold function to control the bit rate that is assigned to each input vector. It achieves a constant rate for the entire image but variable bit rate for each vector in the image.... View full abstract»

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  • Transform coded image reconstruction exploiting interblock correlation

    Publication Year: 1995, Page(s):1023 - 1027
    Cited by:  Papers (73)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Transmission of still images and video over lossy packet networks presents a reconstruction problem at the decoder. Specifically, in the case of block-based transform coded images, loss of one or more packets due to network congestion or transmission errors can result in errant or entirely lost blocks in the decoded image. This article proposes a computationally efficient technique for reconstruct... View full abstract»

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  • Automatic target segmentation by locally adaptive image thresholding

    Publication Year: 1995, Page(s):1036 - 1041
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    A locally adaptive thresholding algorithm, concerning the extraction of targets from a given field of background, is proposed. Conventional histogram-based or global-type methods are deficient in detecting small targets of possibly low contrast as well. The present research is notable for solving the mentioned problems by introducing (1) shape connectivity measure based on co-occurrence statistics... View full abstract»

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  • On some Bayesian/regularization methods for image restoration

    Publication Year: 1995, Page(s):989 - 995
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Methods are reviewed for choosing regularized restorations in image processing. In particular, a method developed by Galatsanos and Katsaggelos (see ibid., vol.1, p.322-336, 1992) is given a Bayesian interpretation and is compared with other Bayesian and non-Bayesian alternatives. A small illustrative example is provided and a complement is provided for the discussion of noise variance estimation ... View full abstract»

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  • Recursive soft morphological filters

    Publication Year: 1995, Page(s):1027 - 1032
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    We present properties of recursive soft morphological filters that use previously filtered outputs as their inputs, cascade combinations of these filters, and the idempotent recursive soft morphological filters. The development allows problems in the implementation of cascaded recursive soft morphological filters to be reduced to the equivalent problems of a single recursive standard morphological... View full abstract»

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  • Adaptive postprocessing algorithms for low bit rate video signals

    Publication Year: 1995, Page(s):1032 - 1035
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A new adaptive postprocessing algorithm to enhance the quality of a noisy video sequence is presented. The algorithm recognizes that the visibility of noise depends on local signal characteristics. It therefore classifies the video signal into different classes and uses separate nonlinear filters matched to each class. The most general version of the algorithm employs motion-compensated frame aver... View full abstract»

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  • Nonlinear image recovery with half-quadratic regularization

    Publication Year: 1995, Page(s):932 - 946
    Cited by:  Papers (144)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    One popular method for the recovery of an ideal intensity image from corrupted or indirect measurements is regularization: minimize an objective function that enforces a roughness penalty in addition to coherence with the data. Linear estimates are relatively easy to compute but generally introduce systematic errors; for example, they are incapable of recovering discontinuities and other important... View full abstract»

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  • Recursive time-varying filter banks for subband image coding

    Publication Year: 1995, Page(s):885 - 895
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    Filter banks, subband/wavelets, and multiresolution decompositions that employ recursive filters have been considered previously and are recognized for their efficiency in partitioning the frequency spectrum. This paper presents an analysis of a new infinite impulse response (IIR) filter bank in which these computationally efficient filters may be changed adaptively in response to the input. The n... View full abstract»

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  • The generalized Gabor transform

    Publication Year: 1995, Page(s):978 - 988
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    The generalized Gabor transform (for image representation) is discussed. For a given function f(t), t∈R, the generalized Gabor transform finds a set of coefficients amr such that f(t)=Σm=-∞Σ r=-∞αmr g(t-mT)exp(i2πrt/T'). The original Gabor transform proposed by D. Gabor (1946) is t... View full abstract»

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  • Optimal median-type filtering under structural constraints

    Publication Year: 1995, Page(s):921 - 931
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (980 KB)

    This paper presents a method for the design of median-type filters that achieve the maximum noise attenuation under structural constraints imposed by the requirement of preserving certain signal or image features. As compared with the design of optimal weighted median (WM) filters that calls for solving a set of linear inequalities, this method is extremely simple yet general enough. The filter is... View full abstract»

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  • Bispectral analysis and model validation of texture images

    Publication Year: 1995, Page(s):996 - 1009
    Cited by:  Papers (29)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2208 KB)

    Statistical approaches to texture analysis and synthesis have largely relied upon random models that characterize the 2-D process in terms of its first- and second-order statistics, and therefore cannot completely capture phase properties of random fields that are non-Gaussian and/or asymmetric. In this paper, higher than second-order statistics are used to derive and implement 2-D Gaussianity, li... View full abstract»

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  • Image coding by block prediction of multiresolution subimages

    Publication Year: 1995, Page(s):909 - 920
    Cited by:  Papers (34)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1964 KB)

    The redundancy of the multiresolution representation has been clearly demonstrated in the case of fractal images, but it has not been fully recognized and exploited for general images. Fractal block coders have exploited the self-similarity among blocks in images. We devise an image coder in which the causal similarity among blocks of different subbands in a multiresolution decomposition of the im... View full abstract»

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  • Morphological pyramids with alternating sequential filters

    Publication Year: 1995, Page(s):965 - 977
    Cited by:  Papers (18)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1084 KB)

    The aim of this paper is to find a relationship between alternating sequential filters (ASF) and the morphological sampling theorem (MST) developed by Haralick et al. (1987). The motivation behind this approach is to take advantage of the computational efficiency offered by the MST to implement morphological operations. First, we show alternative proofs for opening and closing in the sampled and u... View full abstract»

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  • Optimal Gabor filters for texture segmentation

    Publication Year: 1995, Page(s):947 - 964
    Cited by:  Papers (138)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1920 KB)

    Texture segmentation involves subdividing an image into differently textured regions. Many texture segmentation schemes are based on a filter-bank model, where the filters, called Gabor filters, are derived from Gabor elementary functions. The goal is to transform texture differences into detectable filter-output discontinuities at texture boundaries. By locating these discontinuities, one can seg... 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