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首页> 外文期刊>Geoscience and Remote Sensing Letters, IEEE >Feature Enhancement of Stripmap-Mode SAR Images Based on an Optimization Scheme
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Feature Enhancement of Stripmap-Mode SAR Images Based on an Optimization Scheme

机译：基于优化方案的带状图SAR图像特征增强

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摘要

Based on a nonquadratic-optimization method originally proposed for spotlight-mode SAR image reconstruction, a modification for stripmap-mode SAR images is presented in this letter. This is done by mathematically reformulating the projection kernel and numerically putting it into a form that is suitable for optimization. The performance was evaluated by measures of the target contrast and 3-dB beamwidth using Radarsat-1 data. Results were analyzed and compared with those using minimum-variance and multiple-signal-classification methods. Results demonstrate that the target's features are effectively enhanced and that the dominant scattering centers are well separated using the proposed method. In addition, the image fuzziness is greatly reduced, and the image fidelity is well preserved. The effectiveness of the modification is thus validated.
机译：基于最初提出的用于聚光模式SAR图像重建的非二次优化方法，本文对带状图模式SAR图像进行了修改。这是通过数学方式重新构造投影核并将其数值化为适合优化的形式来完成的。通过使用Radarsat-1数据测量目标对比度和3-dB波束宽度来评估性能。分析结果并与使用最小方差和多信号分类方法的结果进行比较。结果表明，使用所提出的方法可以有效地增强目标的特征，并且可以将主要的散射中心很好地分开。另外，大大降低了图像模糊性，并很好地保持了图像保真度。因此，验证了修改的有效性。

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