Edge Detection Algorithm of SAR Images with Wedgelet Filter

Based on the analysis of the characteristics of synthetic aperture radar （SAR） images, a new edge detection method is proposed. The wedgelet transform is introduced into the area of SAR image speckle reduction for it can provide a nearly optimal representation for images in the horizon class. The wedgelet filter has good ability in keeping edge and speckle reduction. Then, a ratio edge detector is applied after a process of speckle reduction. The experimental results show that the method outperforms substantially others visually.