期刊文献+

一种基于非线性扩散方程的SAR图像相干斑抑制方法 被引量:2

A new nonlinear diffusion equation for SAR speckle-removal
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摘要 研究合成孔径雷达(Synthetic aperture radar,SAR)图像的相干斑抑制问题.传统的相干斑抑制方法通常会导致图像中边缘和目标的模糊.针对该问题,分析了基于非线性扩散方程的相干斑抑制方法,该方法的关键在于扩散系数的构造.通过分析SAR图像的先验信息和SAR图像不同特征区域的不同处理要求,提出了一种新的更适合SAR图像相干斑抑制的扩散系数构造方法.实验结果表明,新方法相对现有方法具有更好的相干斑抑制能力和目标边缘特征增强能力,等效视数和边缘清晰度均提高了3倍左右. Traditional speckle removal methods generally result in the loss of image features. Based on the principle analysis and the prior knowledge of SAR image, a new nonlinear diffusion model is constructed. Theoretical analysis and numerical results demonstrate that the proposed method can efficiently depress spackle and enhance the feature of SAR image.
作者 赵侠
出处 《量子电子学报》 CAS CSCD 北大核心 2007年第3期289-293,共5页 Chinese Journal of Quantum Electronics
基金 国家自然科学基金(60572136) 全国优秀博士论文作者专项基金(200140)资助项目
关键词 图像处理 合成孔径雷达 相干斑抑制 非线性扩散方程 特征增强 image processing synthetic aperture radar speckle removal nonlinear diffusionequation feature enhancement
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参考文献8

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