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非线性扩散方程在SAR图像噪声抑制中的应用 被引量：2

Application of Nonlinear Diffusion Equation in SAR Image Denoising
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摘要 将光学图像加性噪声抑制的非线性扩散方程引入到SAR图像相干斑抑制中,通过分析SAR图像的相干斑噪声模型在功率图像域以及功率图像的对数域上的表现特性,说明了基于加性噪声模型的非线性扩散方程在SAR图像噪声抑制中的应用可能性,并由此设计了基于非线性扩散方程的SAR图像噪声抑制算法。计算结果表明,与现有的SAR噪声抑制方法相比,非线性扩散方程方法具有更强的对背景区域的噪声抑制能力,且能更好地保持目标特征。 This paper takes advantge of the anisotropic diffusion for additive noise reducing to reduce the speckle in SAR image. It analyses the distribution of speckle model of SAR image and its Log image, and the result shows that using the anisotropic diffusion for additive noise reducing to reduce the speckle is feasible. Then it gives an algorithm for speckle reducing based on anisotropic diffusion. Numerical results show that the new model has better denoising result than some known methods, and can heep target feature better.
作者 谢美华 王正明
机构地区 国防科技大学五院系统工程研究所
出处 《现代雷达》 CSCD 北大核心 2005年第9期48-51,71,共5页 Modern Radar
基金 国家自然科学基金资助项目(No.60272013) 全国优秀博士论文作者专项基金资助项目(No.200140)
关键词 合成孔径雷达 相干斑 各向异性扩散 synthetic aperture radar speckle anisotropic diffusion
分类号 TN957.51 [电子电信—信号与信息处理]
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参考文献13

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共引文献27

同被引文献17

  • 1韦海军,谢华英,朱炬波.各向异性扩散相干斑抑制改进算法[J].系统工程与电子技术,2005,27(4):619-622. 被引量：2
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二级引证文献5

现代雷达
2005年 第9期

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