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Image Processing And Its Applications, 1999. Seventh International Conference on (Conf. Publ. No. 465)

1999

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  • Wavelet based filtering in nuclear medicine

    Publication Year: 1999, Page(s):851 - 855 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    Nuclear medicine imaging utilises the nuclear properties of radioactive nuclides to make diagnostic evaluation of the anatomic and physiologic condition of the body. In contrast to other imaging techniques which are based upon anatomy, it permits one to gather medical information that may be otherwise unavailable, require surgery or necessitate more expensive diagnosis tests. One of the major sour... View full abstract»

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  • Automated shape metamorphosis for 3D objects

    Publication Year: 1999, Page(s):846 - 850 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    An automated three-dimensional shape metamorphosis system is presented. Based on spherical harmonic (SH) object representation, intermediate transition models are obtained from the interpolation of spherical harmonic parameters of the two objects. During each intermediate step uniform compensation for size and shape changes is accomplished View full abstract»

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  • An implementation of a real-time digital watermarking process for broadcast monitoring on a Trimedia VLIW processor

    Publication Year: 1999, Page(s):775 - 779 vol.2
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (268 KB)

    The implementation of a real-time digital watermark embedder and detector for television broadcast monitoring is addressed. A Trimedia processor with 4 BOPS (billion operations per second) is used for a software implementation. The performance of the system is tested in a laboratory environment under real-time conditions. The results prove the feasibility of a professional broadcast surveillance s... View full abstract»

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  • Automatic identification of cracks in road surfaces

    Publication Year: 1999, Page(s):671 - 675 vol.2
    Cited by:  Papers (4)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    The Highways Agency required a high speed automatic crack monitoring system capable of identifying and locating surface cracks of widths of approximately 2 mm and greater, over at least 80% of the width of a traffic lane (the width of traffic lanes on motorways and all-purpose trunk roads ranges approximately between 3 m and 3.65 m). Transport Research Laboratory Ltd., assisted by Softronic System... View full abstract»

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  • Image comparison methods for perimeter surveillance

    Publication Year: 1999, Page(s):799 - 802 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    An early step in any image sequence analysis algorithm is the comparison of successive images. Several alternative frame comparison measures are examined and assessed against the conventional image differencing technique. The use of illumination compensation techniques improves the performance of perimeter surveillance systems. We compare two such methods, previously reported by Bischel (1994) and... View full abstract»

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  • A one pass parallel hexagonal thinning algorithm

    Publication Year: 1999, Page(s):841 - 845 vol.2
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    The development of a fully parallel hexagonal thinning algorithm is reported and compared with a similar algorithm for use with rectangularly sampled images. Both algorithms produced good skeletons, but the hexagonal could be implemented with only 50% of the logical operations required by the rectangular View full abstract»

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  • Mosaic image segmentation with bias field correction

    Publication Year: 1999, Page(s):861 - 864 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    This paper presents an automatic method of correcting nonuniform RF coil response for the classification of body composition using MR imaging. By linear mosaic modelling, the smoothly but nonlinearly varying bias field which modulates tissue intensities within the image was corrected. The overlapping between adjacent mosaics ensured consistent segmentation of body fat content and the effectiveness... View full abstract»

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  • List of authors

    Publication Year: 1999, Page(s):xxviii - xxxii
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    First Page of the Article
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  • Using 3D structure and anisotropic diffusion for object segmentation

    Publication Year: 1999, Page(s):532 - 536 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    We describe an advanced technique that can be employed to carry out the segmentation task. The goal is the development of a system capable of solving the segmentation problem in most situations encountered in video sequences taken from real world scenes. For this aim the presented segmentation scheme comprises different processing steps implemented as independent modules. The core of the system is... View full abstract»

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  • Handwritten digits parameterisation for HMM based recognition

    Publication Year: 1999, Page(s):770 - 774 vol.2
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (224 KB)

    Handwriting classification or recognition methods based on neural networks (NN) have been extensively studied and they are now well known. This process, which parameterises the geometric structure of the digits as a previous stage to their recognition by the neural network, has the inconvenience of ignoring the sequential character of handwriting. The method proposed explores the improvement intro... View full abstract»

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  • Estimation of pebble size distributions for geophysical applications

    Publication Year: 1999, Page(s):666 - 670 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    We consider the problem of generating size-frequency distributions of pebbles for mining support applications. Based on simple image processing operations and some geometrical constraints, we develop a scheme which is simple, robust and readily parallisable. We apply this system to some illustrative test data, which shows that the algorithm works under reasonable conditions. We then consider its p... View full abstract»

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  • Video surveillance tracking using colour region adjacency graphs

    Publication Year: 1999, Page(s):794 - 798 vol.2
    Cited by:  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    An automatic tracking system is presented which uses the matching of attributed region adjacency graphs to track moving objects. The problem of object recognition with complex colour images is always made difficult by the changing shape and illumination of objects moving relative to complex light sources. Moreover, a moving camera causes additional complications in distinguishing an object. Howeve... View full abstract»

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  • Page similarity and the Hausdorff distance

    Publication Year: 1999, Page(s):755 - 759 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (276 KB)

    The VideoWriter is a real-time system that uses digitized images from a computer-controlled video camera to find the location of pages on a desktop. Once an image of a page is extracted, the system must determine if the page has been previously stored. We investigate the use of the Hausdorff distance metric to compare two-level versions of page images. The Hausdorff distance metric does not requir... View full abstract»

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  • An algorithm for face and facial-feature location based on grey-scale information and facial geometry

    Publication Year: 1999, Page(s):625 - 629 vol.2
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    We describe a two-stage algorithm for detecting human faces based on the grey-scale information of the input image and facial geometry. The first stage involves locating approximately the head boundaries and the facial features, the exact locations of which are determined in the second stage. The algorithm is evaluated on data sets and some characteristics of its performance are identified. As wel... View full abstract»

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  • Image model behaviour in multiresolution

    Publication Year: 1999, Page(s):836 - 840 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (192 KB)

    Multiresolution analysis is being extensively used in the signal processing literature. In this paper, we show the behaviour of a general degradation model (Y=B ⊗ X+W) over different resolutions and derive an expression for the degradation model at all coarse resolutions given the degradation model at the finest resolution. Knowledge of the behaviour of the degradation model over resolution... View full abstract»

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  • Handwriting recognition using HMMs and a conservative level building algorithm

    Publication Year: 1999, Page(s):736 - 739 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    We describe a method for the recognition of cursively handwritten words using hidden Markov models (HMMs). The modelling methodology used has previously been successfully applied to the recognition of both degraded machine-printed text and hand-printed numerals. This paper addresses the additional problems that result from the greater degree of variability present in cursive script. The impact of ... View full abstract»

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  • Low level switched model-based coder for low bit-rate applications

    Publication Year: 1999, Page(s):605 - 609 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    Switching a model-based coder to a standard transform coder during times of poor modelling can exploit the favourable attributes of an MBC whilst maintaining the image integrity. Previous investigations have employed switching where the entire frame is interchanged between a modelled image and an H.261 coded image according to a bit-rate/quality metric. This contribution explores the use of switch... View full abstract»

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  • Fast Euclidean morphological operators using local distance transformation by propagation, and applications

    Publication Year: 1999, Page(s):856 - 860 vol.2
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    We propose a new method to compute the morphological dilation of a binary image with a circular structuring element of any given size, on a discrete lattice. The algorithm is equivalent to applying a threshold on an exact Euclidean distance map, but computations are restricted to a minimum number of pixels. The complexity of this dilation algorithm is compared to the complexity of the commonly use... View full abstract»

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  • Seventh International Conference An Image Processing And Its Applications

    Publication Year: 1999, Page(s):i - xxvii
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (552 KB)

    First Page of the Article
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  • Region-based image coding for remote sensing

    Publication Year: 1999, Page(s):808 - 812 vol.2
    Cited by:  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    This paper argues that texture regions in remotely sensed images of the Earth are often of no interest to projects for example, concerned with agricultural applications. These regions require a large number of bits to be encoded. It is proposed that they can be identified using a generic algorithm that identifies the boundaries of textured regions irrespective of their class, and removed from the ... View full abstract»

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  • Loop and leaning detection in a text using profile approximation

    Publication Year: 1999, Page(s):765 - 769 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    This paper deals with the analysis of off line handwritten text from which some characteristics of the style are extracted. By use of a fractal approach, applied to the profiles of a text line, we have defined new parameters that gives the degree of loop on stroke for any writing. In the same way, the average leaning of a hand-written sentence has been reached View full abstract»

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  • Online extraction of lumen region and boundary from endoscopic images using a quad structure

    Publication Year: 1999, Page(s):818 - 822 vol.2
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    A new approach for the automatic extraction of the lumen region and its boundary for the gastrointestinal (GI) endoscopic images is presented. At first, a quasi region of interest representing the darker regions of the image is segmented by using a region splitting scheme named progressive thresholding. Then the lumen region is obtained by using a region growing technique called integrated neighbo... View full abstract»

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  • Multiscale edge detection: a discussion on feature visibility

    Publication Year: 1999, Page(s):547 - 551 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    Centroid attraction is a multiscale approach to edge detection, which has been developed by the authors. It has been designed particularly for the analysis of synthetic aperture radar (SAR) data. We describe the method and explore one performance issue-that of feature size visibility. It is shown that in the simplest noise-free case, the feature must occupy at least half the filter window in order... View full abstract»

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  • Automatic fusion of multiple non-destructive testing images and CAD models for industrial inspection

    Publication Year: 1999, Page(s):661 - 665 vol.2
    Cited by:  Papers (3)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    Currently, three complementary non-destructive testing (NDT) methods are available for the examination of the structural integrity of aircraft components. These are ultrasonic, radiographic and shearographic inspection techniques. As the image features generated by each type of inspection technique are very different from one another, each NDT method requires its own highly trained operators to ac... View full abstract»

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  • Algorithms for ultra-fast location of ellipses in digital images

    Publication Year: 1999, Page(s):542 - 546 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (488 KB)

    This paper shows how an earlier sampling approach can be extended by a range of techniques related to our triple bisection algorithm. These techniques are characterised by very high speed of operation coupled with accurate location: a suitable technique can be chosen and tuned for any of a number of scenarios where a specific level of robustness is required. While we have tested these techniques o... View full abstract»

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