Speckle Reduction with Multiresolution Bilateral Filtering for SAR Image

Synthetic aperture radar (SAR) images are inherently affected by multiplicative speckle noise, which requires despeckle before many other image processing and analysis applications. In this paper, a new speckle reduction method based on wavelet and bilateral filtering is proposed. Bilatreal filtering is applied to the low frequency subbands of a signal obtained by wavelet transform. The new method preserves edges and protect details. Experimental results tested on real SAR images demonstrate the performance of the proposed method.