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改进Frost算子在SAR图像斑点噪声抑制中的应用 被引量：7

Application of SAR Image De-speckling Method Based on Improved Frost Filter
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摘要 针对合成孔径雷达(SAR)图像斑点噪声滤波的重要性以及存在的问题,对Frost滤波算法参数进行分析,指出了该算法等权滤波器在处理含有细节结构特征时存在盲目平滑的缺点,进而提出了改进方法。利用灰度差值计算权值,综合考虑滤波窗口内的强度信息,在一定程度上解决了盲目平滑的问题。实验验证了改进算法的有效性,并以斑点噪声指数和边缘保持指数为评价准则,通过与Frost算法比较,对改进算法在去除噪声和边缘保持方面的性能做了客观评价。 Aimed at the importance of speckle filtering for SAR image and the problem of filtering already existed, the disadvantage of blindfold smoothing Frost filter with equal weight was indicated when proceeding areas with detailed features and an improved method was proposed based on the analysis of the parameters of Frost filter. The weights were computed by using the difference in gray values. The blindfold problem was solved at a certain extent because of taking account of the intensity information in the filter window, Experimentation validated this algorithm, and the Speckle Index（SI） and Edge Preservation Index（EPI） also were taken to evaluate the smoothing and edge preservation capability by comparing with the Frost filter.
作者 杨婧玮 李贺 王智超
机构地区 四川大学电子信息学院 信息工程大学测绘学院 [
出处 《测绘科学技术学报》 北大核心 2009年第4期280-282,287,共4页 Journal of Geomatics Science and Technology
关键词 合成孔径雷达 Frost算子 斑点噪声 斑点噪声指数 边缘保持指数 SAR Frost filter speckle noise SI EPI
分类号 P237 [天文地球—摄影测量与遥感]
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参考文献9

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二级参考文献40

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测绘科学技术学报
2009年 第4期

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