Browsing by Subject "Image segmentation"

Now showing items 1-20 of 34

    • Article  

      AM-FM texture segmentation in electron microscopic muscle imaging 

      Pattichis, Marios S.; Pattichis, Constantinos S.; Avraam, Maria; Bovik, Alan Conrad; Kyriacou, Kyriacos C. (2000)
      This paper describes the application of an amplitude modulation-frequency modulation (AM-FM) image representation in segmenting electron micrographs of skeletal muscle for the recognition of: 1) normal sarcomere ultrastructural ...
    • Conference Object  

      Atherosclerotic carotid plaque segmentation 

      Loizou, Christos P.; Pattichis, Constantinos S.; Istepanian, Robert Sh Habib; Pantzaris, Marios C.; Nicolaïdes, Andrew N. (2004)
      Atherosclerosis is the major cause of heart attack and stroke in the western world. In this paper we present a computerized method for segmenting the athrerosclerotic carotid plaque from ultrasound images. The method uses ...
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      Atherosclerotic carotid wall segmentation in ultrasound images using Markov random fields 

      Petroudi, Styliani; Loizou, Christos P.; Pattichis, Constantinos S. (2010)
      This work explores the segmentation of the intima-media complex (IMC) of the common carotid artery (CCA) wall for the evaluation of the intima media thickness (IMT) on B-mode ultrasound images. The IMT provides important ...
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      Biologically inspired region of interest selection for low bit-rate video coding 

      Tsapatsoulis, Nicolas; Pattichis, Constantinos S.; Rapantzikos, K. (2006)
      A variety of approaches have been proposed in the literature for Region-Of-Interest (ROI) estimation. In most of them the ROI definition is highly subjective, i.e., lacks scientific evidence in supporting the claim that ...
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      Brain MR image normalization in texture analysis of multiple sclerosis 

      Loizou, Christos P.; Pantzaris, Marios C.; Seimenis, Ioannis; Pattichis, Constantinos S. (2009)
      A problem that occurs in texture analysis and quantitative analysis of magnetic resonance imaging (MRI), is that the extracted results are not comparable between consecutive or repeated scans or, within the same scan, ...
    • Article  

      Brain white matter lesion classification in multiple sclerosis subjects for the prognosis of future disability 

      Loizou, Christos P.; Kyriacou, Efthyvoulos C.; Seimenis, Ioannis; Pantzaris, Marios C.; Petroudi, Styliani; Karaolis, Minas A.; Pattichis, Constantinos S. (2013)
      This study investigates the application of classification methods for the prognosis of future disability on MRI-detectable brain white matter lesions in subjects diagnosed with clinical isolated syndrome (CIS) of multiple ...
    • Conference Object  

      Classification of satellite cloud imagery based on multi-feature texture analysis and neural networks 

      Christodoulou, Christodoulos I.; Michaelides, Silas C.; Pattichis, Constantinos S.; Kyriakou, Kyriaki (2001)
      The aim of this work was to develop a system based on modular neural networks and multi-feature texture analysis that will facilitate the automated interpretation of cloud images. This will speed up the interpretation ...
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      Combination of different texture features for mammographic breast density classification 

      Liasis, G.; Pattichis, Constantinos S.; Petroudi, Styliani (2012)
      Mammographic breast density refers to the prevalence of fibroglandular tissue as it appears on a mammogram. Breast density is not only an important risk for developing breast cancer but can also mask abnormalities. Breast ...
    • Article  

      A Comparison of Ultrasound Intima-Media Thickness Measurements of the Left and Right Common Carotid Artery 

      Loizou, Christos P.; Nicolaïdes, Andrew N.; Kyriacou, Efthyvoulos C.; Georghiou, N.; Griffin, Maura B.; Pattichis, Constantinos S. (2015)
      The intima-media thickness (IMT) of the common carotid artery (CCA) is an established indicator of cardiovascular disease (CVD). There have been reports about the difference between the left and the right sides of the CCA ...
    • Article  

      Completely automated multiresolution edge snapper-A new technique for an accurate carotid ultrasound IMT measurement: Clinical validation and benchmarking on a multi-institutional database 

      Molinari, F.; Pattichis, Constantinos S.; Zeng, G.; Saba, L.; Acharya, U. R.; Sanfilippo, R.; Nicolaïdes, Andrew N.; Suri, J. S. (2012)
      The aim of this paper is to describe a novel and completely automated technique for carotid artery (CA) recognition, far (distal) wall segmentation, and intima-media thickness (IMT) measurement, which is a strong clinical ...
    • Article  

      Conformal Mapping for the Efficient Solution of Poisson Problems with the Kansa-RBF Method 

      Liu, X. -Y; Chen, C. S.; Karageorghis, Andreas (2017)
      We consider the solution of Poisson Dirichlet problems in simply-connected irregular domains. These domains are conformally mapped onto the unit disk and the resulting Poisson Dirichlet problems are solved efficiently using ...
    • Article  

      Crowds by example 

      Lerner, A.; Chrysanthou, Yiorgos L.; Lischinski, D. (2007)
      We present an example-based crowd simulation technique. Most crowd simulation techniques assume that the behavior exhibited by each person in the crowd can be defined by a restricted set of rules. This assumption limits ...
    • Conference Object  

      Despeckle filtering in ultrasound video of the common carotid artery 

      Loizou, Christos P.; Kasparis, Takis; Christodoulides, Paul; Theofanous, Charoula; Pantzaris, Marios C.; Kyriacou, Efthyvoulos C.; Pattichis, Constantinos S. (2012)
      Noise reduction is essential for increasing the visual quality or as a preprocessing step for further automated analysis in video sequences and video coding. The objective of this work was to investigate four different ...
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      A fully automated method using active contours for the evaluation of the intima-media thickness in carotid US images 

      Petroudi, Styliani; Loizou, Christos P.; Pantzaris, Marios C.; Pattichis, Marios S.; Pattichis, Constantinos S. (2011)
      The thickness of the intima-media complex (IMC) of the common carotid artery (CCA) wall is important in the evaluation of the risk for the development of atherosclerosis. This paper presents a fully automated algorithm for ...
    • Article  

      Guest editorial cardiovascular health informatics: Risk screening and intervention 

      Hartley, C. J.; Naghavi, M.; Parodi, O.; Pattichis, Constantinos S.; Poon, C. C. Y.; Zhang, Y. -T (2012)
      Despite enormous efforts to prevent cardiovascular disease (CVD) in the past, it remains the leading cause of death in most countries worldwide. Around two-thirds of these deaths are due to acute events, which frequently ...
    • Article  

      An integrated system for the segmentation of atherosclerotic carotid plaque 

      Loizou, Christos P.; Pattichis, Constantinos S.; Pantzaris, Marios C.; Nicolaïdes, Andrew N. (2007)
      In this paper, we propose and evaluate an integrated system for the segmentation of atherosclerotic plaque in ultrasound imaging of the carotid artery based on normalization, speckle reduction filtering, and four different ...
    • Article  

      An integrated system for the segmentation of atherosclerotic carotid plaque ultrasound video 

      Loizou, Christos P.; Petroudi, Styliani; Pantzaris, Marios C.; Nicolaïdes, Andrew N.; Pattichis, Constantinos S. (2014)
      The robust border identification of atherosclerotic carotid plaque, the corresponding degree of stenosis of the common carotid artery (CCA), and also the characteristics of the arterial wall, including plaque size, ...
    • Article  

      Isolating stock prices variation with neural networks 

      Draganova, C.; Lanitis, A.; Christodoulou, Chris C. (2009)
      In this study we aim to define a mapping function that relates the general index value among a set of shares to the prices of individual shares. In more general terms this is problem of defining the relationship between ...
    • Article  

      A Kansa-Radial Basis Function Method for Elliptic Boundary Value Problems in Annular Domains 

      Liu, X. -Y; Karageorghis, Andreas; Chen, C. S. (2015)
      We employ a Kansa-radial basis function (RBF) method for the numerical solution of elliptic boundary value problems in annular domains. This discretization leads, with an appropriate selection of collocation points and for ...
    • Article  

      Kansa-RBF algorithms for elliptic problems in axisymmetric domains 

      Karageorghis, Andreas; Chen, C. S.; Liu, X. -Y (2016)
      We employ a Kansa-radial basis function method for the numerical solution of elliptic boundary value problems in three-dimensional axisymmetric domains. We consider problems governed by the Poisson equation, the inhomogeneous ...