The Essence of SAR Image Speckle Suppression
HAN Chun-ming, GUO Hua-dong, WANG Chang-lin( Laboratory of Remote Sensing Information Sciences, Institute of Remote Sensing Applications , Chinese Academy of Sciences , Beijing 100101, China )
The Speckle in SAR images disturbs SAR image application. In the past 20 years numerous methods to reduce speckle in SAR images have been proposed. Although these methods can effectively reduce speckle in SAR images, they blur edge and texture information. In this paper, SAR image speckle suppression is analyzed from the view of mathematical physics. In fact, SAR image speckle suppression is an inverse problem. The essence SAR image speckle suppression is found by analyzing the speckle statistical distribution and the common speckle filters. It is important for developing the method, which can effectively reduce speckle in SAR images and can preserve edge and texture information.