| 基于改进的小波软阈值法的SAR图像去噪 |
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| 引用本文： | 张微,孙蓉桦,章孝灿.基于改进的小波软阈值法的SAR图像去噪[J].遥感信息,2004(4):4-6. |
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| 作者姓名： | 张微 孙蓉桦 章孝灿 |
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| 作者单位： | 浙江大学空间信息技术研究所,浙江,杭州,310027 |
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| 摘 要： | 斑点效应是SAR图像所不可避免的，在不降低图像空间分辨率前提下消除或最大限度地抑制斑点噪声，是当前研究的热点。本介绍了一条能够让小波技术更好地应用于雷达图像去噪而实现起来又非常简便的途径——将原始雷达图像作对数变换，将乘性噪声转化为加性噪声，再进行小波去噪。
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| 关 键 词： | SAR图像 斑点效应 小波阈值法 局部软阈值法 |
| 文章编号： | 1000-3177(2004)76-0004-03 |
| 修稿时间： | 2004年6月9日 |
Noise Removal of SAR Image Based on Improved Wavelet Soft-Thresholding Method |
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| ZHANG Wei,SUN Rong-Hua,ZHANG Xiao-Can.Noise Removal of SAR Image Based on Improved Wavelet Soft-Thresholding Method[J].Remote Sensing Information,2004(4):4-6. |
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| Authors: | ZHANG Wei SUN Rong-Hua ZHANG Xiao-Can |
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| Abstract: | Speckle is ineluctable in the SAR image. It is the research focus that the speckle is removed or restrained as much as possible on the premise that spacial resolution is not reduced. In this paper, a new method where wavelet technique can be used in SAR image better and simpler is introduced. At first , logarithm transform of SAR image is carried, and multiplicative noisy is transformed into additive one, then wavelet de-noising is carried out. |
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| Keywords: | SAR image speckle wavelet thresholding method wavelet level-dependent soft-thresholding method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
