Firstly, the image is smoothed with the adaptive wavelet filter;the multiple speckles are removed while the edge property of SAR images is sustained.It made the detection easier.

• 首先采用自适应小波滤波方法对图像进行滤波，在保留图像细节的前提下有效地去除了图像中的乘性噪声，使后续的检测变得相对容易。