A METHOD FOR SAR SPECKLE REDUCTION BASED ON PARTIAL DIFFERENTIAL EQUATION

摘要

Synthetic Aperture Radar (SAR) has been get broad recognition and application in many domains such as surveying and mapping. But the SAR speckles influence the interpretation of the image badly. In this paper, we discuss the second-order and the fourth-order partial differential equations(PDE), and we unite the two equations to reduce the speckles. Finally we use SAR image to do some experiment, the result shows that this equation combine the strongpoint of the second-order and the fourth-order partial differential equation, it can keep the edge of the SAR image and reduce the SAR speckle better. It avoids the block effect when we use second-order PDE to progress image and makes the image smoothing naturally.