Spatially Adaptive Thresholding of the Empirical Mode Decomposition for Speckle Reduction Purposes
Conference: EUSAR 2014 - 10th European Conference on Synthetic Aperture Radar
06/03/2014 - 06/05/2014 at Berlin, Germany
Proceedings: EUSAR 2014
Pages: 4Language: englishTyp: PDF
Personal VDE Members are entitled to a 10% discount on this title
Authors:
Mata-Moya, David de la; Diaz-Soria, Alvaro; Martin-de-Nicolas, Jaime; Jarabo-Amores, Maria-Pilar; Pelaez, Víctor Manuel (University of Alcala, Spain)
Abstract:
Automatic interpretation of SAR data, especially in coastal images, is extremely difficult due to speckle noise and its inherent multiplicative nature. In this paper, a speckle reduction filtering technique based on Empirical Mode Decomposition (EMD) is considered. An adaptive thresholding robust against the type of clutter is proposed against a universal fixed thresholding. The new threshold is calculated with a sliding window to preserve edge information discarding the noise. Results show a satisfactory despeckling avoiding an over-smoothing in the whole image. After an analysis of the adaptive threshold levels, a ship detector is designed as an added value.