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IEE Proceedings - Vision, Image and Signal Processing

Issue 4 • Date 22 Aug. 2003

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Displaying Results 1 - 9 of 9
  • Vector area morphology for motion field smoothing and interpretation

    Publication Year: 2003, Page(s):219 - 226
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (733 KB)

    A new nonlinear technique for filtering motion fields and other multivariate data is introduced. The method is developed from mathematical morphological area openings and uses a vector-to-scalar transform, in which each vector is replaced by the sum of the distances to its connected neighbours, to control the growth of extrema regions. As the filter either perfectly preserves or completely removes... View full abstract»

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  • Region-growing approach to colour segmentation using 3D clustering and relaxation labelling

    Publication Year: 2003, Page(s):270 - 276
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1763 KB)

    The paper presents a new segmentation algorithm for colour images based on a series of region growing and merging processes. This algorithm starts with the region growing process, which groups pixels into homogeneous regions by combining 3D clustering and relaxation labelling techniques. Each resulting small region is then merged to the region which is the nearest to it in terms of colour similari... View full abstract»

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  • Neural minor component analysis approach to robust constrained beamforming

    Publication Year: 2003, Page(s):205 - 218
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    Since the pioneering work of S.-I. Amari (1977) and E. Oja (1982; 1989; 1992), principal component neural networks and their extensions have become an active adaptive signal processing research field. One of such extensions is minor component analysis (MCA), that proves to be effective in tasks such as robust curve/surface fitting and noise reduction. The aims of the paper are to give a detailed a... View full abstract»

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  • Area-time efficient between-class variance module for adaptive segmentation process

    Publication Year: 2003, Page(s):263 - 269
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (503 KB)

    Adaptive progressive thresholding (APT) has been shown to be an efficient method to segment the lumen region of endoscopic images. A pipelined architecture was previously proposed in an attempt to accelerate the conventional APT in hardware. A novel architecture for the between-class variance computations of APT is presented to minimise the severe bottleneck of the iterative loop in the APT proces... View full abstract»

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  • Compression of image block means for non-equal block partition schemes using Delaunay triangulation and prediction

    Publication Year: 2003, Page(s):239 - 243
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (925 KB)

    An approach based on applying Delaunay triangulation to the compression of mean values of image blocks that have non-identical shape and size is proposed. It can be useful for image compression methods that require the use of image partition schemes with non-equal block sizes, such as fractal and DCT-based image coding. Some aspects of practical realisation of the proposed method are discussed. Ev... View full abstract»

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  • Low-power data-dependent 8×8 DCT/IDCT for video compression

    Publication Year: 2003, Page(s):245 - 255
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (691 KB)

    Traditional fast discrete cosine transform (DCT)/inverse DCT (IDCT) algorithms have focused on reducing arithmetic complexity and have fixed run-time complexities regardless of the input. Recently, data-dependent signal processing has been applied to the DCT/IDCT. These algorithms have variable run-time complexities. A two-dimensional 8×8 low-power DCT/IDCT design is implemented using VHDL b... View full abstract»

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  • Popular biorthogonal wavelet filters via a lifting scheme and its application in image compression

    Publication Year: 2003, Page(s):227 - 232
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (242 KB)

    A technique using a lifting scheme is presented for constructing compactly supported wavelets whose coefficients are composed of free variables locating in an interval. An efficient approach-based wavelet for image compression is developed by selecting the coefficients of the 9-7 wavelet filter and associated lifting scheme. Furthermore, the rationalised coefficients wavelet filter that can be imp... View full abstract»

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  • Hybrid Golomb codes for a group of quantised GG sources

    Publication Year: 2003, Page(s):256 - 260
    Cited by:  Papers (3)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    The authors develop a class of codes for quantised generalised Gaussian (GG) sources. This new class of codes, that are called hybrid Golomb (HG) codes, are hybrids of Golomb-Rice (GR) codes and exp-Golomb (EG) codes. They integrate the properties of both GR and EG codes, which makes their performance more robust under variable source parameters. The efficiencies of the three classes of codes are ... View full abstract»

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  • Adaptive data hiding based on VQ compressed images

    Publication Year: 2003, Page(s):233 - 238
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (700 KB)

    Data hiding involves embedding secret data into various forms of digital media such as text, image, audio, and video. With the rapid growth of network communication, data-hiding techniques are widely used in protecting copyright, embedding captions and communicating secretly. The authors propose an adaptive algorithm to embed data into VQ compressed images. This method adaptively varies the embedd... View full abstract»

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