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.