Abstract: This paper represents a novel approach to improve de-speckling in SAR images. The main issue in imaging technique is presence of grainy noise termed as ‘speckle’, which will affect the overall quality of image, hence it is highly required to use effective speckle reduction techniques to suppress speckle. Various filtering techniques are available to reduce the speckle noise and to enhance the quality of the image. As Speckle noise is multiplicative in nature which is very much difficult to remove. So this paper presents a review on different spatial and transform methods such as spatial domain technique and wavelet domain techniques.

Keywords: Synthetic aperture radar (SAR), speckle noise, statistical parameter.