The study showed that spatial domain filers have difficulties in reserving good edge and texture information at the same time reducing speckles, so they have to make a compromise.

• 空间域的滤波处理，很难达到在消除相干斑噪声的同时又能很好地保留边缘和纹理细节的理想状态。一般只能在相干斑噪声消除和边缘信息保留两个方面进行折衷。