Synthetic Aperture Radar (SAR) speckle filtering techniques can be classified into three categories: multi-look processing, statistical filtering and filtering in transform domain.
合成孔径雷达(SAR)图像相干斑噪声滤波技术分成三类：多视处理、统计滤波和变换域滤波。
But because of different imaging types, SAR image has large difference with optical image, techniques adapt to optical image registration can not be directly used to SAR image registration.
由于成像方式不同，SAR图像与光学图像具有很大差异，光学图像的配准方法直接应用于SAR图像配准中往往不能取得令人满意的效果。
The practical RFI and speckle noise suppression techniques for ultra-wideband SAR are proposed.
提出了实用的超宽带sar射频干扰(RFI)和相干斑噪声抑制技术。
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