一种用各向异性扩散方程抑制SAR相干斑噪声的方法
An Anisotropic Diffusion Equation for SAR Speckle Reduction
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摘要: 本文提出了一种基于各向异性扩散偏微分方程抑制合成孔径雷达(SAR)图像的相干斑噪声的算法，简称DSADE算法。本算法根据SAR图像的局部特征在均匀区域各向同性扩散，边缘细节区域各向异性扩散，不仅可以很好地保持边缘细节信息，而且可以对其进行增强。实验结果表明，本算法不仅有效抑制了SAR图像的相干斑噪声，保持并增强了边缘细节，而且有着良好的图像视觉效果。Abstract: In this paper, a new method named DSADE Despeckle with Anisotrpic Diffusion Equation which is based on anisotropic diffusion equation for SAR speckle reduction is proposed. With the local statistics values, DSADE provides anisotropic diffusion in the heterogenous area and isotropic diffusion in the homogeneous area. Thus, DSADE can not only preserve the edges and details, but also enhance them. In our experiment, DSADE is proved good performance in reducing speckle noise in SAR images and enhancing edges and details at the same time. Moreover, the filtered SAR images look good.
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