Homogeneity Criteria for Lee and Wavelet-Based Speckle Reduction Filters

Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany

Proceedings: EUSAR 2006

Pages: 4Language: englishTyp: PDF

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Bezvesilniy, O. O.; Dukhopelnykova, Y. V.; Vynogradov, V. V.; Vavriv, D. M. (Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Chervonopraporna St. 4, 61002 Kharkov, Ukraine)
Schünemann, K. (Technical University Hamburg-Harburg, Denickestraße 22, 21073 Hamburg, Germany)

An improved homogeneity criterion for the Lee filter is proposed, which takes into account not only the variance of the speckle noise, but also statistical properties of the local estimates of the mean and the variance used to calculate the filter coefficient. Also, a rule for selection of the thresholds for 1D and 2D wavelet-based filters is presented taking into account the statistics of the speckle noise and properties of the chosen wavelets.