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Proceedings. Fourteenth International Conference on Pattern Recognition (Cat. No.98EX170)

20-20 Aug. 1998

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  • Proceedings Fourteenth International Conference On Pattern Recognition [front matter]

    Publication Year: 1998, Page(s):i - xxxvi
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    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s):xxxvii - xlvii
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    Freely Available from IEEE
  • Colour based object tracking

    Publication Year: 1998, Page(s):1442 - 1444 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    A method of detecting and tracking objects using colour is presented. We track objects using a simple colour histogram based technique, which is fast and more robust to occlusion and camera motion than simple "blob" based techniques. View full abstract»

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  • An effective entropic thresholding for ultrasonic images

    Publication Year: 1998, Page(s):1552 - 1554 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    A new entropy-based thresholding is presented. As a result, a gray level minimizing the difference between the entropy of the object and that of the background will be the desired threshold. Performance of the proposed method has been tested on some ultrasonic images. The results obtained from the method proposed by Kapur et al. (1985) are also given for comparison. View full abstract»

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  • Personal identification based on handwriting

    Publication Year: 1998, Page(s):1761 - 1764 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (63 KB)

    Many techniques have been reported for handwriting-based writer identification. Most techniques assume that the written text is fixed (e.g., in signature verification). In this paper we attempt to eliminate this assumption by presenting a novel algorithm for automatic text-independent writer identification. Given that the handwriting of different people can often be visually distinctive, we take a... View full abstract»

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  • Joint segmentation and image interpretation using hidden Markov models

    Publication Year: 1998, Page(s):1840 - 1842 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Image interpretation consists of interleaving the low-level task of image segmentation and the high-level task of interpretation. The idea being that the interpretation block guides the segmentation block which in turn helps the interpretation block in better interpretation. In this paper we develop a joint segmentation and image interpretation scheme using the notion of joint hidden Markov model ... View full abstract»

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  • Uncertainty in pose estimation: a Bayesian approach

    Publication Year: 1998, Page(s):972 - 976 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    We propose a the use of a consistent Bayesian methodology for the analysis of the uncertainty associated with a pose estimation procedure. A novel model-based technique to estimate the pose of rigid 3D objects from laser range finder images is studied, and various sources of uncertainty are carried through the process using a Bayesian MAP treatment, yielding local, point-by-point estimates of posi... View full abstract»

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  • Effect of controlled image acquisition on fingerprint matching

    Publication Year: 1998, Page(s):1659 - 1661 vol.2
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    In an automatic fingerprint identification or authentication system, the matcher subsystem handles the most complex task of compensating for scaling, translation, rotation and structural distortions of the fingerprint minutiae features due to skin elasticity. We analyze the effect of controlled image acquisition on matcher performance. We show that simple steps in image acquisition can enhance the... View full abstract»

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  • Fingerprint card classification with statistical feature integration

    Publication Year: 1998, Page(s):1833 - 1839 vol.2
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    This paper describes a fingerprint classification algorithm for an automated fingerprint identification system with a large-size ten-print card database. The classification algorithm determines a fingerprint's pattern category based on a ridge structure analysis and a direction-based neural network, and computes additional feature characteristics such as core-delta distance, along with confidence ... View full abstract»

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  • Robust range segmentation

    Publication Year: 1998, Page(s):969 - 971 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    This paper proposes a robust estimator which is capable of segmenting multi-structural data. The proposed estimation technique is used to segment range data into linear (planar) and quadratic surfaces. The performance of the proposed range segmentation algorithm is tested on a number of real data sets View full abstract»

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  • Neural network based minutiae filtering in fingerprints

    Publication Year: 1998, Page(s):1654 - 1658 vol.2
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    Minutiae correspond essentially to the terminations and bifurcations of fingerprint patterns. Since the quality of fingerprint images is often low, automatic minutiae detection is a very difficult task and the extraction algorithms produce a large number of false alarms. We present an approach to minutiae filtering based on a neural network. The minutiae neighborhoods extracted by the algorithm pr... View full abstract»

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  • Relative performance of correlation-based and feature-based classifiers of aircraft using radar range profiles

    Publication Year: 1998, Page(s):1828 - 1832 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    A surveillance system which automatically classifies aircraft can be very useful, especially with the problem of congestion at large airports. This paper evaluates the performance of correlation- and feature-based classifiers on a set of four simulated radar targets over a wide range of target orientations. Experiments are performed for a range of radar bandwidths in order to determine the effect ... View full abstract»

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  • Regularization-based 3D object modeling from multiple range images

    Publication Year: 1998, Page(s):964 - 968 vol.2
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    Several methods have been proposed for building 3D object models from multiple range images mainly on the basis of the deformable models and pseudo-dynamics. However, the patches are usually placed crossing over the edge regions, and the surface orientation discontinuities cannot be properly preserved as a result. This paper proposes a new 3D object modeling method that generates refined triangula... View full abstract»

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  • Semi-automated Maltese front position determination

    Publication Year: 1998, Page(s):1382 - 1386 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    The authors investigate the reliability of a semi-automated system designed to locate the Maltese front from satellite AVHRR and SAR imagery. The opening and closing operations of mathematical morphology afford a means of image segmentation that provides smooth, strong, continuous edges except where the edges are obscured by clouds or similar phenomena. The authors evaluate the results by comparin... View full abstract»

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  • Image mosaicing for rolled fingerprint construction

    Publication Year: 1998, Page(s):1651 - 1653 vol.2
    Cited by:  Papers (10)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    With the use of inkless scanners as input devices for acquiring fingerprints of a person, the digital image of the finger is restricted to the area in contact with the sensor The conventional method of fingerprint image acquisition involves obtaining a nail-to-nail image of the finger known as the rolled fingerprint impression. We present a method of constructing a rolled fingerprint from an image... View full abstract»

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  • Combining NL processing and video data to query American Football

    Publication Year: 1998, Page(s):1238 - 1240 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (24 KB)

    We explore the use of natural language understanding and image processing to index and query American Football tapes. We present a model for representing spatio-temporal characteristics of multiple objects in dynamic scenes in this domain, and a recognition system which uses the model to recognise American Football plays View full abstract»

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  • Some general grouping principles: line perception from points as an example

    Publication Year: 1998, Page(s):1825 - 1827 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    This paper first suggests some general principles for computing perceptual organization and then presents a model to group points into line contours. The grouping factors arise at two levels. At the first level, grouping factors are identified as direct point-point interaction and orientation interaction. Point-point interaction is short-ranged and homogeneous. Orientation interaction is locally o... View full abstract»

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  • A factorization method using 3D linear combination for shape and motion recovery

    Publication Year: 1998, Page(s):959 - 963 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    This study proposes a new factorization method for shape and motion recovery. In the past, the fourth greatest singular value of the measurement matrix was ignored. But when noise is large enough so that the fourth greatest singular value can not be ignored, it would be difficult to get reliable results by using the traditional factorization method. In order to acquire reliable results, We start w... View full abstract»

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  • Recognition of facial expressions using muscle-based feature models

    Publication Year: 1998, Page(s):1379 - 1381 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    We present a technique for recognizing facial expressions from image sequences. The technique uses muscle-based feature models for tracking facial features. Since the feature models are constructed with a small number of parameters and are deformable in the limited range and directions, each search space for a feature can be limited. The technique estimates muscular contractile degrees for classif... View full abstract»

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  • Low cost architecture for structure measure distance computation

    Publication Year: 1998, Page(s):1592 - 1594 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (48 KB)

    Huge and expensive computation resources are usually required to perform graph labelling at high speed. This fact restricts an extensive use of this methodology in industrial applications such as visual inspection. A new systolic architecture is presented which computes structural distances between cliques of different graphs based on a modified incremental Levenshtein distance algorithm. The dist... View full abstract»

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  • Detection of foreign substances mixed in a plastic bottle of medicinal solution using real-time video image processing

    Publication Year: 1998, Page(s):1646 - 1650 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    This paper presents a new method for detecting foreign substances mixed in a plastic bottle of medicinal solution using real-time video image processing. Obstructions to detection of foreign substances due to unevenness such as corners, embossed symbols and graduations on the bottle surface are removed by looking through a clear part of the surface using an optics obliquely imaging a vertical sect... View full abstract»

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  • Face recognition using multiple image view line segments

    Publication Year: 1998, Page(s):1198 - 1200 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (52 KB)

    Describes an image-based face recognition technique using line segments of 2D image views that achieves high generalisation recognition rates for rotations both in and out of the plane, is invariant to scaling, and has reduced execution times. Results show that the algorithm is superior compared with benchmark algorithms and is able to recognise test views in quasi real-time View full abstract»

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  • Depth from defocus vs. stereo: how different really are they?

    Publication Year: 1998, Page(s):1784 - 1786 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (48 KB)

    Depth from focus (DFF) and depth from defocus (DFD) methods are shown to be realizations of the geometric triangulation principle. Fundamentally, the depth sensitivities of DFF and DFD are not different than those of stereo (or motion) based systems having the same physical dimensions. Contrary to common belief DFD does not inherently avoid the matching (correspondence) problem. Basically DFD and ... View full abstract»

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  • Fast searching of digital face libraries using binary image metrics

    Publication Year: 1998, Page(s):1235 - 1237 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    We describe a shape comparison method applicable to fast screening of large facial databases. The proposed technique derives holistic similarity measures without the explicit need of point-to-point correspondence thus delivering speed and tolerance to local non-rigid distortions. Specifically, we developed a face similarity measure derived as a variant of the Hausdorff distance by introducing the ... View full abstract»

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  • Locating bookbacks in a bookrack image

    Publication Year: 1998, Page(s):1822 - 1824 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    There is a substantial interest in locating bookbacks in a bookrack image using the edge information contained in the image. The effective edge information considered here is defined between two adjacent bookbacks, called a “bookback edge”. The main steps of the proposed approach are as follows: the edge points of the input image are first detected by a simple thresholding method, a me... View full abstract»

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