Browsing by Author "Zwiggelaar, Reyer"

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Browsing by Author "Zwiggelaar, Reyer"

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  • Hoon Yap, Moi; Ugail, Hassan; Zwiggelaar, Reyer (2014-04-01)
    Aims: To establish a rich Facial Action Coding System (FACS) coded database and to investigate the use of the facial visual cues for deception detection. Study Design: A within-participants design experiment was conducted, ...
  • MacParthaláin, Neil Seosamh; Jensen, Richard; Shen, Qiang; Zwiggelaar, Reyer (2010-03-15)
    The accuracy of methods for the assessment of mammographic risk analysis is heavily related to breast tissue characteristics. Previous work has demonstrated considerable success in developing an automatic breast tissue ...
  • Crocker, Matthew; Saadoun, Samira; Jury, Alexa; Jones, Chris; Zacharoulis, Stergios; Zwiggelaar, Reyer; Bridges, Leslie R.; Bell, B. Anthony; Papadopoulos, Marios C. (2012-05-05)
    Tumor vasculature is a promising therapeutic target in glioblastoma. Imaging tumor blood flow may help assess the efficacy of anti-angiogenic treatments. We determined the clinical usefulness of stable xenon CT performed ...
  • Zhu, Yanong; Williams, Stuart; Zwiggelaar, Reyer (2007)
    Three-Dimensional (3D) Active Shape Modeling (ASM) is a straightforward extension of 2D ASM. 3D ASM is robust when true volumetric data is considered. However, when the information in one dimension is sparse, pure 3D ASM ...
  • Zwiggelaar, Reyer; Strange, Harry George; He, Wenda; Chen, Zhili; Kshirasagar, Ashwini; Denton, Erika R.E. (2014-03-01)
  • Stafford, J. V.; Zwiggelaar, Reyer; Bull, C. R. (1995)
    This paper discusses the potential of using vision systems to monitor and control arable farming operations. Several examples, predominately concerned with the detection of weeds in crops, that have been or are being ...
  • Bull, C. R.; McFarlane, N. J. B.; Zwiggelaar, Reyer; Allen, C. J.; Mottram, T. T. (1996-05-01)
    In order to implement robotic milking it is necessary to automate the inspection and cleaning of cow teats prior to milking. This paper assesses the potential of detecting manure on teats using information from a colour ...
  • Strange, Harry; Zwiggelaar, Reyer (2010-09)
    We present a framework for the reduction of dimensionality of a data set via manifold learning. Using the building blocks of local hyperplanes we show how a global manifold can be reconstructed by iteratively merging these ...
  • Boggis, C. R. M.; Taylor, C. J.; Astley, S. M.; Zwiggelaar, Reyer (2004)
    We describe methods for detecting linear structures in mammograms, and for classifying them into anatomical types (vessels, spicules, ducts, etc). Several different detection methods are compared, using realistic synthetic ...
  • Phillips, Chris O.; Syed, Yasir; MacParthaláin, Neil Seosamh; Zwiggelaar, Reyer; Claypole, Tim C.; Lewis, Keir E. (2012-09)
    Exhaled volatile organic compounds (VOCs) have shown promise in diagnosing chronic obstructive pulmonary disease (COPD) but studies have been limited by small sample size and potential confounders. An investigation was ...
  • Chen, Zhili (Aberystwyth UniversityComputer Science, 2013)
    Breast cancer is currently the most common cancer among women worldwide. Mammography has been the most reliable and effective screening tool for the early detection of breast cancer. Recently, computer-aided diagnosis has ...
  • Chen, Zhili (Aberystwyth UniversityComputer Science, 2013)
    ABSTRACT Breast cancer is currently the most common cancer among women worldwide. Mammography has been the most reliable and e ective screening tool for the early detection of breast cancer. Recently, computer-aided ...
  • He, Wenda; Denton, Erika R.E.; Stafford, Kirsten; Zwiggelaar, Reyer (2011-07)
    Mammographic risk assessment is becoming increasingly important in decision making in screening mammography and computer aided diagnosis systems. Strong evidence shows that characteristic patterns of breast tissue as seen ...
  • Zeng, Ziming (Aberystwyth UniversityComputer Science, 2013)
    Segmentation is a hot issue in the domain of medical image analysis. It has a wide range of applications on medical research. A great many medical image segmentation algorithms have been proposed, and many good segmentation ...
  • Zwiggelaar, Reyer; Parr, T. C.; Schumm, J. E.; Hutt, I. W.; Taylor, C. J.; Astley, S. M.; Boggis, C. R. M. (1999)
    Computer-aided mammographic prompting systems require the reliable detection of a variety of signs of cancer. In this paper we concentrate on the detection of spiculated lesions in mammograms. A spiculated lesion is typically ...
  • Strange, Harry George; Chen, Zhili; Denton, Erika R. E.; Zwiggelaar, Reyer (2014-10-01)
    In mammographic imaging, the presence of microcalcifications, small deposits of calcium in the breast, is a primary indicator of breast cancer. However, not all microcalcifications are malignant and their distribution ...
  • Onyango, Christine M.; Marchant, John A.; Zwiggelaar, Reyer (1997-06)
    No absolute certainty can be given for information derived from images. In most cases image analysis uses single algorithms, or multiple single algorithms' results which are combined in an ad hoc manner, to derive certain ...
  • Oliver, A.; Freixenet, Jordi; Marti, R.; Pont, J.; Perez, E.; Denton, Erika R. E.; Zwiggelaar, Reyer (2008-01-07)
    It has been shown that the accuracy of mammographic abnormality detection methods is strongly dependent on the breast tissue characteristics, where a dense breast drastically reduces detection sensitivity. In addition, ...
  • Strange, Harry George; Zwiggelaar, Reyer (Springer-Verlag, Berlin, 2014-01-07)
    The last few years have seen a great increase in the amount of data available to scientists. Datasets with millions of objects and hundreds, if not thousands of measurements are now commonplace in many disciplines. However, ...
  • Zwiggelaar, Reyer; Bull, C. R. (1995)
    Links between the fractal Hausdorff dimension, the Fourier transform of two-dimensional scenes, and image segmentation by texture are discussed. It is shown that the fractal Hausdorff dimension can be derived by integration ...

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