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Browsing by Author "Van Wyk, MA"

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  • Van den Bergh, F; Van Wyk, MA; Van Wyk, BJ (2006)
    This paper presents two new schemes for interpolating missing samples in satellite diurnal temperature cycles (DTCs). The first scheme, referred to here as the cosine model, is an improvement of the model proposed in [2] ...
  • Olwal, TO; Van Wyk, MA; Van Wyk, BJ (World Academy of Science, Engineering and Technology, 2009)
    In this paper the authors present a soft timing phase estimation (STPE) method for wireless mobile receivers operating in low signal to noise ratios (SNRs). Discrete Polyphase Matched (DPM) filters, a Log-maximum a posterior ...
  • Toudjeu, IT; Van Wyk, BJ; Van Wyk, MA; Van Den Bergh, F (Springer-Verlag Berlin Heidelberg, 2008-06)
    Traditionally, granulometries are obtained using a series of openings or closings with convex structuring elements of increasing size. Granulometries constitute a useful tool for texture and image analysis since they are ...
  • Dickens, JS; Green, JJ; Van Wyk, MA (2011-07)
    Underground mine automation has the potential to increase safety, productivity and allow the mining of lower-grade resources. In a mining environment with both autonomous robots and humans, it is essential that the robots ...
  • Olwal, TO; Van Wyk, MA; Van Wyk, BJ; Odhiambo, M; Chatelain, D (African Network for Scientific and Technological Institutions ( ANSTI), 2007-06)
    This paper presents a decentralised cross layer dynamic power control (DDPC) scheme for Wireless Mesh Networks (WMNs). A general cross-layer occupation measure (COM) based on transmission scheduling probability (TSP) and ...
  • Van Wyk, BJ; Van Wyk, MA; Van Den Bergh, F (South African Institute of Electrical engineers, 2007-06)
    The concept of an Image Difference Spectrum, a novel tool for the extraction of global image information, is introduced. It is shown that Image Difference Spectra are fast alternatives to granulometric curves, also referred ...
  • Dickens, JS; Van Wyk, MA; Green, JJ (IEEE Africon 2011, 2011-09)
    Mine vehicles are a leading cause of mining fatalities. A reliable anti-collision system is needed to prevent vehicle-personnel collisions. The proposed collision detection system uses the fusion of a three-dimensional ...
  • Udahemuka, G; Van Den Bergh, F; Van Wyk, BJ; Van Wyk, MA (18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), 2007-11)
    Land surface temperatures (LSTs) can be approximated from brightness temperatures observed from satellites. Estimation errors between observed brightness temperatures and a brightness temperature model of a given pixel ...