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首页> 外文期刊>ISPRS Journal of Photogrammetry and Remote Sensing >Despeckle and geographical feature extraction in SAR images by wavelet transform
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Despeckle and geographical feature extraction in SAR images by wavelet transform

机译:小波变换提取SAR图像中的斑点和地理特征

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摘要

This paper presents a method to despeckle Synthetic Aperture Radar (SAR) image, and then extract geographical features in it. In this research work, speckle is reduced by multiscale analysis in wavelet domain. In terms of geographical feature preservation the result shows that the method is better compared to spatial domain filters, such as Lee, Kuan, Frost, Ehfrost, Median, Gamma filters. The geographical features such as roads, airport runways, rivers and other ribbon-like shape structures are detected by the new wavelet-based method as proposed by Yuan Yan Tang. Experimental results show that the proposed method extracts geographical features of different width as well as different gray levels.
机译:本文提出了一种对合成孔径雷达(SAR)图像进行去斑,然后提取其中的地理特征的方法。在这项研究工作中,通过小波域的多尺度分析来减少斑点。在地理特征保护方面,结果表明,与空间过滤器(例如Lee,Kuan,Frost,Ehfrost,Median,Gamma过滤器)相比,该方法更好。袁延堂提出的基于小波的新方法可以检测道路,机场跑道,河流和其他带状形状结构等地理特征。实验结果表明,该方法提取了不同宽度,不同灰度等级的地理特征。

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