By Topic

IEE Proceedings - Vision, Image and Signal Processing

Issue 3 • Date Jun 2002

Filter Results

Displaying Results 1 - 8 of 8
  • New fuzzy model for morphological colour image processing

    Publication Year: 2002, Page(s):129 - 139
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (704 KB)

    Mathematical morphology is a powerful tool for image processing and analysis of binary, greyscale and colour images. An efficient new fuzzy model for morphological colour image processing is introduced. A new vector-ordering scheme that uses fuzzy if-then rules is proposed, and then the basic morphological operations of erosion and dilation are defined. The morphological operators presented, which... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modelling and segmentation of lip area in face images

    Publication Year: 2002, Page(s):179 - 184
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (514 KB)

    The problem of automatic segmentation of face images to extract the lip area is considered in the context of lip tracking. A novel segmentation method is proposed for lip tracker initialisation which is based on a Gaussian mixture model of the pixel RGB values. The model is built using the predictive validation technique advocated by Kittler (1997) which has been modified to allow modelling with f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Index assignment in vector quantisation for channels with memory

    Publication Year: 2002, Page(s):162 - 167
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (421 KB)

    The study presents a formulation of a Hadamard framework for analysing the vector quantisation over channels with memory. In seeking faster response, classes of index assignments are defined in terms of the Hadamard transform of channel transition probabilities. An index assignment algorithm is developed that achieves high robustness against channel errors, and its performance in vector quantisati... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Neighbourhood-blocks motion vector estimation technique using pyramidal data structure

    Publication Year: 2002, Page(s):140 - 151
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (704 KB)

    A pyramidal motion estimation technique that makes use of the motion correlation within a pyramidal level is proposed. In the proposed technique, motion vectors from neighbouring motion blocks are taken into consideration as possible candidates. This is done in lieu of scaling the motion vectors from the corresponding positions at the adjacent lower pyramidal level as the prediction motion vectors... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Steady-state analysis of computational load in correlation-based image tracking

    Publication Year: 2002, Page(s):168 - 172
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (415 KB)

    The computational load in correlation-based image tracking is analysed in terms of the image frame rate. The computational load is defined as the number of arithmetic and data management operations per unit time required for correlation-based image tracking. The optimal frame rate is presented for minimising the computational load. The optimal rate is derived based on steady-state analysis under t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Audio decoding with frequency and complexity scalability

    Publication Year: 2002, Page(s):152 - 158
    Cited by:  Papers (2)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (498 KB)

    The paper describes a technique to design a complexity-scalable audio codec based on the partial reconstruction of the spectrum of a signal. The technique can be applied to any subband coding system based on cosine-modulated filterbanks. In the decoder, only a part of the subband is reconstructed, achieving an output signal with a lower sampling rate. The new synthesis filterbank, with a reduced n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fast method for face location and tracking by distributed behaviour-based agents

    Publication Year: 2002, Page(s):173 - 178
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (441 KB)

    The authors present a novel approach for fast human face location and tracking in colour image sequences. First, a number of colour-sensitive behaviour-based agents are uniformly distributed in the 2-D image environment to search the skin-like pixels and mark the face-like regions by activating their evolutionary behaviour. Then the shape information of each face candidate region is examined and t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Polynomials for narrowband signal processing

    Publication Year: 2002, Page(s):159 - 161
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (277 KB)

    A novel window function series in the form of two-term polynomials suitable for narrow mainlobe width applications is described. The mainlobe width of the polynomial series can assume values between ±1/T to ±1.5/T, where T is the window duration and the asymptotic decay can be either 6dB/octave or 12dB/octave depending on the criterion imposed. The polynomial series has the narrowest... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.