Browsing Vision, Graphics and Visualisation Group by Title

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Browsing Vision, Graphics and Visualisation Group by Title

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  • 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 ...
  • 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 ...
  • Zwiggelaar, R. (2008)
    Mammographic risk assessment is concerned with the probability of a woman developing breast cancer. Recently, it has been suggested that the density of linear structures is related to risk. Two independent sets of mammographic ...
  • W He, E. R. E. Denton; Zwiggelaar, R. (2009)
    Strong evidence shows that characteristic patterns of breast tissues as seen on mammography, referred to as mammographic parenchymal patterns, provide crucial information about breast cancer risk. Quantitative evaluation ...
  • He, W.; Zwiggelaar, R.; Denton, E. R. E.; Muhimmah, I. (2008)
    We present an approach to automate texton selection to achieve optimized mammogram segmentation results with respect to mammographic building blocks (i.e. nodular, linear, homogeneous, and radiolucent) as described by ...
  • 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 ...
  • Dee, Hannah; Fraile, Roberto; Hogg, David C.; Cohn, Anthony G. (2008)
    This paper describes a method for building visual “maps” from video data using quantized descriptions of motion. This enables unsupervised classification of scene regions based upon the motion patterns observed within them. ...
  • 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 ...
  • Chen, Jingying; Tiddeman, Bernard Paul (Springer Berlin / Heidelberg, 2008-07-01)
    An efficient and robust facial feature detection and tracking system is presented in this paper. The system is capable of locating a human face automatically. Six facial feature points (pupils, nostrils and mouth corners) ...
  • Hogg, David C.; Dee, Hannah (2006)
    This paper will describe new work that attempts to perform the modelling of human behaviour not at the level of visible patterns of motion, but at the level of intentions. By inferring intentions in terms of known goals, ...
  • Dee, Hannah Mary; Hogg, David C. (2009-02-01)
    We propose a new method that treats visible human behaviour at the level of navigational strategies. By inferring intentions in terms of known goals, it is possible to explain the behaviour of people moving around within ...
  • Santos, Paulo E.; Fenelon, Valquiria; Dee, Hannah (2008)
  • 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, ...
  • Woodland, Alan; Labrosse, Frederic (Eurographics Association, 2005)
    Many computer vision and graphics related techniques rely upon illumination invariance of images to derive meaning from images of an object under varying lighting conditions. This is all the appearance-based methods. In ...
  • 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 ...
  • Martí, R.; Martí, J.; Freixenet, J.; Zwiggelaar, Reyer; Vilanova, J.C.; Barceló, J. (2008-07)
    The paper presents and evaluates a speckle detection method for B-scan images. This is a fully automatic method and does not require information about the sensor parameters, which is often missing in retrospective studies. ...
  • Strange, Harry; Zwiggelaar, Reyer (2010)
    Manifold learning is a widely used statistical tool which reduces the dimensionality of a data set while aiming to maintain both local and global properties of the data. We present a novel manifold learning technique which ...
  • Liu, Yonghuai (2011-05-01)
    For accurate registration of overlapping free form shapes, different points in one shape must select different points in another as their most sensible correspondents. To reach this ideal state, in this paper we develop a ...
  • Dee, Hannah; Santos, Paulo E. (2011-08-07)
    Recently, psychologists have turned their attention to the study of castshadows and demonstrated that the human perceptual system values information fromshadows very highly in the perception of spatial qualities, sometimes ...

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