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提出了一种新型的Lee滤波与曲波相结合的降噪方法。首先采用16个方向检测模板扫描图像,区分和标记均匀区域和边缘区域;然后分别使用Lee和改进软阈值的曲波降噪方法处理SAR图像的均匀区域和边缘区域;最后组合2种降噪结果,生成完整的降噪图像。实验结果证明,该方法既能更有效地抑制SAR图像噪声,同时又能更好地保持图像边缘信息。
A new denoising method based on Lee filter and curvelet is proposed. Firstly, 16 direction detection templates are used to scan the images to distinguish and mark the homogeneous regions and the edge regions. Then, the uniform regions and the edge regions of the SAR images are processed respectively by using the Lee and the improved soft-threshold curved noise reduction method. Finally, two kinds of noise reduction results are combined , To generate a complete noise reduction image. The experimental results show that this method not only can effectively reduce the SAR image noise, but also can keep the image edge information better.