| 基于EMD小波阈值化的SAR图像斑点抑制 |
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| 引用本文： | 甘学武,魏文斌.基于EMD小波阈值化的SAR图像斑点抑制[J].空军雷达学院学报,2009,23(2):100-102. |
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| 作者姓名： | 甘学武 魏文斌 |
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| 作者单位： | 1. 空军雷达学院研究生管理大队,武汉,430019
2. 空军雷达学院空天基预警监视装备系,武汉,430019 |
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| 摘 要： | 为有效抑制SAR图像斑点噪声，提出了基于EMD小波阈值化的斑点抑制方法．该方法首先用EMD方法将含斑点噪声的SAR图像分解为若干层基本分量，对前几个分量用小波阈值化方法进行处理，然后重构图像，从而达到抑制斑点噪声的目的．实验结果表明，该方法同小波阈值方法和二维EMD方法相比，去噪效果较明显，在抑制斑点噪声的同时，较好地保持了边缘和细节信息．
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| 关 键 词： | 经验模态分解 SAR图像 斑点噪声 小波阈值化 |
A Speckle Suppression Method for SAR Image Based on Wavelet Threholding EMD |
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| GAN Xue-wu,WEI Wen-bin.A Speckle Suppression Method for SAR Image Based on Wavelet Threholding EMD[J].Journal of Air Force Radar Academy,2009,23(2):100-102. |
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| Authors: | GAN Xue-wu WEI Wen-bin |
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| Affiliation: | GAN Xue-wu, WEI Wen-bin(1. Department of Graduate Management, AFRA, Wuhan 430019, China;2. Department of Air/Space-based Early Warning Surveillance Equipment, AFRA, Wuhan 430019, China) |
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| Abstract: | In order to suppress SAR image speckle noise effectively, a new speckle reduction method was proposed in terms of EMD wavelet thresholding. In this method, the SAR image containing speckle noise was decomposed into a number of elementary components by using EMD, and then the first several components were processed by using wavelet thresholding, finally, the image was reconstructed, which reduced the speckle noise. Experimental results show that this method has good effect on suppressing speckle noise, compared to the wavelet thresholding and 2D EMD ones, and has advantages of sufficiently retaining edge and detail information while suppressing speckle noise. |
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| Keywords: | empirical mode decomposition （EMD） SAR image speckle noise wavelet thresholding |
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