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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Improved multilook techniques applied to SAR and SCANSAR imagery
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Improved multilook techniques applied to SAR and SCANSAR imagery

机译：应用于SAR和SCANSAR影像的改进的多视技术

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摘要

The multilook processing used in SAR (synthetic aperture radar) image formation to reduce the speckle noise is considered. Two multilook techniques are proposed for improving the radiometric resolution without altering the geometric resolution and the characteristics of the impulse response. These techniques are based on the formation of looks with different bandwidths. The final image is formed by giving each look a proper size and weighting, and by adding them incoherently. The looks with wide bandwidth contribute to an improvement of the overall geometric resolution, while the looks with narrow bandwidth improve the overall radiometric resolution. The equivalent number of looks is more than 2.3 times the number of independent looks and is superior to conventional multilook processing with overlapping. Finally, using the proposed techniques, an algorithm for efficient SAR and ScanSAR processing is presented, and its validity is proved by image comparison and analysis.
机译：考虑了用于SAR（合成孔径雷达）图像形成的多视点处理，以减少斑点噪声。提出了两种多视点技术，以在不改变几何分辨率和脉冲响应特性的情况下提高辐射分辨率。这些技术基于具有不同带宽的外观的形成。通过给每个外观适当的大小和权重，以及不相干地添加它们，来形成最终图像。具有宽带宽的外观有助于总体几何分辨率的提高，而具有窄带宽的外观则可以提高总体辐射度分辨率。等效外观数是独立外观数的2.3倍以上，并且优于具有重叠功能的常规多外观处理。最后，利用所提出的技术，提出了一种有效的SAR和ScanSAR处理算法，并通过图像比较和分析证明了其有效性。

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