关键词: 合成孔径雷达, 相干斑抑制, 空域滤波, 变换域滤波

Abstract: Speckle suppression becomes a hot topic in SAR image processing field, which is a key step in SAR image interpretability and application. Therefore, the speckle suppression algorithm in SAR images has important research value. Mechanism and mathematic model of SAR image speckle suppression are briefly introduced, the new research results are summarized, the spatial filtering method and transform filtering method are analyzed. Considering the feasibility of algorithm, the analysis and evaluation for representational image speckle suppression methods are carried out and some common indexes for evaluating the effect of speckle suppression are summed up. The further development of SAR image speckle suppression in the future is discussed.

Key words: Synthetic Aperture Radar（SAR）, speckle suppression, spatial filtering, transform filtering