Browsing by Subject "LULU operators"

Browsing by Subject "LULU operators"

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  • Evaluation of noise removal in signals by LULU operators 
    Fabris-Rotelli, Inger Nicolette; Van Oldenmark, K.; Van Staden, Paul Jacobus (South African Statistical Association, 2010-11)
    The LULU smoothers are effective nonlinear smoothers for signals. We investigate their ability to remove different noise types, namely symmetrical and skewed, as well as heavy- and light-tailed, thereby uncovering the true ...
  • Inhomogeneous spatial modelling of DPT pulses for marine images 
    Fabris-Rotelli, Inger Nicolette; Stein, Alfred (Elsevier, 2018-12)
    The Discrete Pulse Transform (DPT) is a nonlinear decomposition of a signal and extracts the structures in a signal at discrete scale levels. This study models the image structure extracted using the DPT as connected ...
  • LULU operators and discrete pulse transform for multidimensional arrays 
    Anguelov, Roumen; Fabris-Rotelli, Inger Nicolette (Institute of Electrical and Electronics Engineers, 2010-11)
    The LULU operators for sequences, that is, Ln,Un and their compositions, are extended to multidimensional arrays in a way which preserves their essential properties, e.g., consistent separation, total variation and shape ...
  • LULU operators for functions of continuous argument 
    Anguelov, Roumen; Rohwer, Carl (Carl H.) (NISC, 2009)
    The LULU operators, well known in the nonlinear multiresolution analysis of sequences, are extended to functions defined on a continuous domain, namely, a real interval. We show that the extended operators replicate the ...