基于塔形形态算法的SAR图像相干斑抑制

摘要

提出将塔形形态算法用于抑制SAR图像中相干斑处理,为减少塔形处理中由于下采样造成的信息损失,从并行处理的角度出发,对塔形形态滤波器提出了改进,将下采样中的各子图同时进行形态滤波处理,在上采样中将各子图合并.经分析和处理表明这两种算法用于SAR图像滤波都能有效地去除相干斑噪声.与塔形形态滤波、Lee 滤波器算法比较,采用并行算法处理后图像的各项指标有明显的改善.%A Pyramidal Morphology Algorithm is developed for speckle reduction of SAR images in this paper.For reducing the loss of information in the pyramidal algorithm for morphology processing, in this modified algorithm, the sub-images are processed parallel in the downsampling operation and the sub-images are reconstructed in the upsampling operation.It can be applied to image filtering parallel.After analysis the computer simulations show that these two kinds of filters are both effective in speckle reduction of SAR images.The modified parallel algorithm does better than the original algorithm and Lee filter on some characteristics.