Modified frost speckle filter based on anisotropic diffusion

The demand for speckle reduction of synthetic aperture radar (SAR) images is to smooth the speckle noise while preserving the structure information of the original images. This paper provides a new method derived from Frost filter kernel for SAR images speckle reduction based on anisotropic diffusion. The anisotropic diffusion is the edge-sensitive diffusion, so it is introduced into the conventional Frost filter to get the better edge preservation for the speckled images. The final experimental results for both the synthetic speckled images and the real SAR images show that the proposed algorithm can get better performance in terms of the extent of the speckle suppression and the fine details preservation.