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IEEE Transactions on Image Processing

Issue 6 • Date Jun 1999

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Displaying Results 1 - 12 of 12
  • Significance-linked connected component analysis for wavelet image coding

    Publication Year: 1999, Page(s):774 - 784
    Cited by:  Papers (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1036 KB)

    The success in wavelet image coding is mainly attributed to a recognition of the importance of data organization and representation. There have been several very competitive wavelet coders developed, namely, Shapiro's (1993) embedded zerotree wavelets (EZW), Servetto et al.'s (1995) morphological representation of wavelet data (MRWD), and Said and Pearlman's (see IEEE Trans. Circuits Syst. Video T... View full abstract»

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  • Theoretical analysis of multispectral image segmentation criteria

    Publication Year: 1999, Page(s):798 - 820
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1336 KB)

    Markov random field (MRF) image segmentation algorithms have been extensively studied, and have gained wide acceptance. However, almost all of the work on them has been experimental. This provides a good understanding of the performance of existing algorithms, but not a unified explanation of the significance of each component. To address this issue, we present a theoretical analysis of several MR... View full abstract»

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  • Stereoscopic ranging by matching image modulations

    Publication Year: 1999, Page(s):785 - 797
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    We apply an AM-FM surface albedo model to analyze the projection of surface patterns viewed through a binocular camera system. This is used to support the use of modulation-based stereo matching where local image phase is used to compute stereo disparities. The local image phase is an advantageous feature for image matching, since the problem of computing disparities reduces to identifying local p... View full abstract»

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  • Image compression with a hybrid wavelet-fractal coder

    Publication Year: 1999, Page(s):868 - 874
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    A hybrid wavelet-fractal coder (WFC) for image compression is proposed. The WFC uses the fractal contractive mapping to predict the wavelet coefficients of the higher resolution from those of the lower resolution and then encode the prediction residue with a bitplane wavelet coder. The fractal prediction is adaptively applied only to regions where the rate saving offered by fractal prediction just... View full abstract»

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  • Image sharpening in the JPEG domain

    Publication Year: 1999, Page(s):874 - 878
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    We present a new technique for sharpening compressed images in the discrete-cosine-transform domain. For images compressed using the JPEG standard, image sharpening is achieved by suitably scaling each element of the encoding quantization table to enhance the high-frequency characteristics of the image. The modified version of the encoding table is then transmitted in lieu of the original. Experim... View full abstract»

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  • Improved image decoding over noisy channels using minimum mean-squared estimation and a Markov mesh

    Publication Year: 1999, Page(s):863 - 867
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Joint source-channel (JSC) decoding based on residual source redundancy is a technique for providing channel robustness to quantized data. Previous work assumed a model equivalent to viewing the encoder/noisy channel tandem as a discrete hidden Markov model (HMM) with transmitted indices the hidden states. We generalize this HMM-based (1-D) approach for images, using the more powerful hidden Marko... View full abstract»

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  • Exact image deconvolution from multiple FIR blurs

    Publication Year: 1999, Page(s):846 - 862
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1124 KB)

    We address the problem of restoring an image from its noisy convolutions with two or more blur functions (channels). Deconvolution from multiple blurs is, in general, better conditioned than from a single blur, and can be performed without regularization for moderate noise levels. We characterize the problem of missing data at the image boundaries, and show that perfect reconstruction is impossibl... View full abstract»

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  • Statistical properties of coded interlaced and progressive image sequences

    Publication Year: 1999, Page(s):749 - 761
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    We investigate the statistical properties of interlaced and progressive image sequences in order to determine what is the most efficient format from a coding point of view. Intra- and inter-coding modes are both considered. The main result is that, for both intra- and inter-images, the coding of progressive images outperforms the coding of interlaced ones for low bit rates and large motion vectors... View full abstract»

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  • Three-dimensional video compression using subband/wavelet transform with lower buffering requirements

    Publication Year: 1999, Page(s):762 - 773
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Three-dimensional (3-D) video compression using wavelets decomposition along the temporal axis dictates that a number of video frames must be buffered to allow for the temporal decomposition. Buffering of frames allows for the temporal correlation to be made use of, and the larger the buffer the more effective the decomposition. One problem inherent in such a set up in interactive applications suc... View full abstract»

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  • Fast DCT domain filtering using the DCT and the DST

    Publication Year: 1999, Page(s):821 - 833
    Cited by:  Papers (13)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A method for efficient spatial domain filtering, directly in the discrete cosine transform (DCT) domain, is developed and proposed. It consists of using the discrete sine transform (DST) and the DCT for transform-domain processing on the in JPEG basis of the previously derived convolution-multiplication properties of discrete trigonometric transforms. The proposed scheme requires neither zero padd... View full abstract»

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  • Automatic facial feature extraction by genetic algorithms

    Publication Year: 1999, Page(s):834 - 845
    Cited by:  Papers (28)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    An automatic facial feature extraction algorithm is presented. The algorithm is composed of two main stages: the face region estimation stage and the feature extraction stage. In the face region estimation stage, a second-chance region growing method is adopted to estimate the face region of a target image. In the feature extraction stage, genetic search algorithms are applied to extract the facia... View full abstract»

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  • Resolution enhancement of color video sequences

    Publication Year: 1999, Page(s):879 - 885
    Cited by:  Papers (40)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    We propose a new multiframe algorithm to enhance the spatial resolution of frames in video sequences. Our technique specifically accounts for the possibility that motion estimation will be inaccurate and compensates for these inaccuracies. Experiments show that our multiframe enhancement algorithm yields perceptibly sharper enhanced images with significant signal-to-noise ratio (SNR) improvement o... 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