ResearchBib Share Your Research, Maximize Your Social Impacts
Sign for Notice Everyday Sign up >> Login

Speckle Noise Removal Using Dual Tree Complex Wavelet Transform

Journal: International Journal of Scientific & Technology Research (Vol.2, No. 8)

Publication Date:

Authors : ; ; ; ;

Page : 175-179

Keywords : Keywords Discrete Wavelet Transform; Dual Tree Complex Wavelet Transform; SAR image; Satellite images; Bivariate Cauchy probability density function.;

Source : Downloadexternal Find it from : Google Scholarexternal


Abstract Dual Tree Complex Wavelet Transform DTCWTis a form of discrete wavelet transform which generates complex coefficients by using a dual tree of wavelet filters to obtain their real and imaginary parts.In this paper the dual-tree complex wavelet transform DTCWT based despeckling algorithm is proposed for SAR images by considering the significant dependences of the wavelet coefficients across different scales. The DTCWT has the advantage of improved directional selectivity approximate shift invariance and perfect reconstruction over the discrete wavelet transform.The wavelet coefficients in eachsubband are modeled with a bivariate Cauchy probability density function PDF which takes into account the statistical dependence among the wavelet coefficients. The simulation results show that this method is faster and gives better performance when compared to the conventional discrete wavelet transform.

Last modified: 2014-03-17 17:35:34