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IEE Proceedings - Vision, Image and Signal Processing

Issue 1 • Feb 2003

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Displaying Results 1 - 9 of 9
  • Side-match tree-structured vector quantiser for image progressive coding

    Publication Year: 2003, Page(s):6 - 13
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB)

    The balanced tree-structured vector quantiser is the traditional method of achieving image progressive coding. During image progressive coding, an image is decoded step-by-step in a decoder. The author proposes an unbalanced tree-structured vector quantiser to perform image progressive coding for a given series of rate thresholds. Side-match vector quantisation and its variants have been proposed ... View full abstract»

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  • Extension of proposal of standards for intelligibility tests of Chinese speech: CDRT-tone

    Publication Year: 2003, Page(s):1 - 5
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (419 KB)

    The published Chinese diagnostic rhyme test (CDRT) has been proposed as a standard method for evaluating the intelligibility of coded, synthesised or distorted Chinese speech over wired or wireless voice channels in a communication system. Inheriting the philosophy of the English context DRT test, the CDRT only assessed six groups of phonetic attribute distortion. However, pitch distortion is a hi... View full abstract»

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  • New irregular sampling coding method for transmitting images progressively

    Publication Year: 2003, Page(s):44 - 50
    Cited by:  Papers (4)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (606 KB)

    Transmitting images over channels of low capacity is an important issue relating to networks. The authors propose a new progressive image transmission (PIT) method based on the irregular sampling coding scheme. In the proposed method, the original image is first sampled using the irregular sampling scheme and the resulting samples are divided into several segments for the purpose of progressive im... View full abstract»

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  • Image extraction in DCT domain

    Publication Year: 2003, Page(s):20 - 27
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (579 KB)

    More and more digital images are being stored in compressed formats, among which the format using discrete cosine transform (DCT) coefficients is widely adopted (JPEG, MPEG, H.263 etc). To exploit those successful image processing techniques developed in the pixel domain, the authors propose a fast image extraction algorithm to allow images to be extracted directly from compressed DCT coefficients... View full abstract»

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  • Shape based leaf image retrieval

    Publication Year: 2003, Page(s):34 - 43
    Cited by:  Papers (38)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (623 KB)

    The authors present an efficient two-stage approach for leaf image retrieval by using simple shape features including centroid-contour distance (CCD) curve, eccentricity and angle code histogram (ACH). In the first stage, the images that are dissimilar with the query image are first filtered out by using eccentricity to reduce the search space, and fine retrieval follows by using all three sets of... View full abstract»

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  • Enhancement algorithm for nonlinear context-based predictors

    Publication Year: 2003, Page(s):15 - 19
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (377 KB)

    The authors propose a bicandidate algorithm (BCA) to enhance the prediction accuracy of nonlinear context-based predictors, such as the MED predictor (used by LOCO-I/JPEG-LS) and the GAP predictor (used by CALIC). The BCA provides two predictive values to be selected (i.e. there are two candidates), and only part of the selection should be indexed. To test the performance of the BCA, it is applied... View full abstract»

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  • DWT-based high-capacity blind video watermarking, invariant to geometrical attacks

    Publication Year: 2003, Page(s):51 - 58
    Cited by:  Papers (14)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (565 KB)

    The paper describes a high-capacity blind video watermarking system invariant to geometrical attacks such as shift, rotation, scaling and cropping. A spatial domain reference watermark is used to obtain invariance to geometric attacks by employing image registration techniques to determine and invert the attacks. A second, high-capacity watermark, which carries the data payload, is embedded in the... View full abstract»

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  • Experimental 3-D digital TV studio

    Publication Year: 2003, Page(s):28 - 33
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (431 KB)

    The Michelangelo Project at the University of Glasgow has developed an experimental three-dimensional television studio. This uses 24 video cameras and parallel computers to capture moving three-dimensional models of human actors. This allows the capture in real time of the appearance and three-dimensional positions of a human actor. It does this using stereo imaging techniques that have been unde... View full abstract»

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  • Symmetric prefilters for multiwavelets

    Publication Year: 2003, Page(s):59 - 68
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (457 KB)

    When applying discrete multiwavelets, prefiltering is necessary because the initial multiscaling coefficients cannot be trivially derived from the samples of scalar signals. There have been many studies on the design of prefilters, and one main approach is to use a superfunction. The idea is to construct a low-pass function from the multiscaling functions that inherits their approximation power fo... View full abstract»

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