利用各向异性扩散去除SAR图像中的斑点噪声

Speckle Noise Filtering on SAR Images with Anisotropic Diffusion

合成孔径雷达(SAR)图像受到相干斑点噪声的干涉,严重影响合成孔径雷达图像的质量。我们利用各向异性扩散方程抑制合成孔径雷达(SAR)图像中的斑点噪声,只要选择合适的扩散方向和速度,就能较好地保留图像的边缘和细节信息。最后对合成孔径雷达图像进行去噪实验,并与小波去噪滤波方法进行比较,各向异性扩散方程具有更好的抑制噪声的效果。

Synthetic Aperture Radar (SAR) images are usually corrupted by speckle noise. A method that uses the anisotropic diffusion to suppress the speckle noise in Synthetic Aperture Radar images is pres- ented. The diffuse coefficients are selected so that the edge information and local detail in images can be well preserved. And this method is compared with the wavelets filter. The numerical results of the appli- cation to SAR images demonstrate the good performance of anisotropic diffusion filtering.