By Topic

IEE Proceedings - Vision, Image and Signal Processing

Issue 1 • Date Feb 1996

Filter Results

Displaying Results 1 - 9 of 9
  • Bound for Minkowski metric or quadratic metric applied to VQ codeword search

    Publication Year: 1996, Page(s):67 - 71
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (440 KB)

    A bound for a Minkowski metric based on Lp distortion measure is proposed and evaluated as a means to reduce the computation in vector quantisation. This bound provides a better criterion than the absolute error inequality (AEI) elimination rule on the Euclidean distortion measure. For the Minkowski metric of order n, this bound contributes the elimination criterion from the L... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modified neocognitron for improved 2-D pattern recognition

    Publication Year: 1996, Page(s):31 - 40
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1108 KB)

    Some modifications to an existing neural network, the neocognitron, are proposed in order to overcome some of its limitations and to achieve an improved recognition of patterns (for instance, characters). Motivation for the present work arose from the results of extensive simulation experiments on the neocognitron. Inhibition during training is dispensed with, including it only during the testing ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Variable statistical wordlength in digital filters

    Publication Year: 1996, Page(s):62 - 66
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    Statistical wordlength calculations estimate the wordlength to which a digital filter's coefficients can be rounded and still be likely to meet the specification. The value of this wordlength has generally been dominated by the sensitivity of the magnitude response to a small subset of filter coefficients. If variable wordlengths are used, more bits can be assigned to sensitive coefficients and fe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Statistical syntactic methods for high-performance OCR

    Publication Year: 1996, Page(s):23 - 30
    Cited by:  Papers (15)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (916 KB)

    The paper describes a new method for language modelling and reports its application to handwritten OCR. Images of characters are first chain-coded to convert them to strings. A novel language modelling method is then applied to build a statistical model for strings of each class. The language modelling method is based on a probabilistic version of an n-tuple classifier which is scanned along the e... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive step edge model for self-consistent training of neural network for probabilistic edge labelling

    Publication Year: 1996, Page(s):41 - 50
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1056 KB)

    The authors present a robust neural network edge labelling strategy in which a network is trained with data from an imaging model of an ideal step edge. They employ the Sobel operator and other preprocessing steps on image data to exploit the known invariances due to lighting and rotation and so reduce the complexity of the mapping which the network has to learn. The composition of the training se... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Source coding of wavelet-transformed digital HDTV for recording applications

    Publication Year: 1996, Page(s):1 - 9
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2692 KB)

    A novel intraframe source-coding algorithm suitable for the recording of digital high-definition television signals is presented. A multilayered, hierarchical description of the source signal is obtained by means of a quad-tree, halfband wavelet transform. This transform decomposes the input signal into a collection of spectrally nonoverlapping sub-bands. These are used to influence the allocation... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of nonseparable 3-D filter banks/wavelet bases using transformations of variables

    Publication Year: 1996, Page(s):51 - 61
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1072 KB)

    The authors present a technique to design two-channel filter banks in three dimensions where the sampling is on the FCO (face centred orthorhombic) lattice, The ideal 3-D sub-band is of the truncated octahedron shape. The design technique is based transformation of variable method equivalent to the generalised McClellan transformation. The filters are FIR, have linear phase and achieve perfect rec... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal quantisation strategy for DCT image compression

    Publication Year: 1996, Page(s):10 - 14
    Cited by:  Papers (9)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1104 KB)

    The authors present a strategy for generating optimal quantisation tables for use in JPEG image compression and its extension to general block sizes. Directly optimised quantisation tables were obtained by simulated annealing. A composite cost function minimised the RMS error between original and recovered images while keeping the compression ratio close to some desired value. Examination of these... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Region-based image coding using polynomial intensity functions

    Publication Year: 1996, Page(s):15 - 22
    Cited by:  Papers (4)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1636 KB)

    The vast majority of coded images are real-world images. These images consist of distinct objects within a scene, where each object has its own reflective, textural and lighting characteristics. Region-based image coding encodes these images by partitioning the scene into objects, and then describing each object's characteristics using a set of parameters. The paper uses orthonormal polynomial fun... View full abstract»

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