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数据筛选的低频UWBSAR图像快速可视化

DOI: 10.11834/jig.20150116

Keywords: 低频超宽带合成孔径雷达,动态范围压缩,3σ准则,修正映射函数

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Abstract:

目的为了能够快速得到适于视觉解译的UWBSAR图像,提出了一种基于数据筛选的低频UWBSAR图像快速可视化算法。方法该方法从统计学的角度出发,讨论了低频UWBSAR图像数据的统计特性和灰度分布模型;在此基础上,首次提出采用3σ准则对低频UWBSAR图像数据进行筛选;并使用修正映射函数映射。结果对处理后所得图像进行质量评估,可以发现,所得灰度图在等效视数、中央凹特征和对比敏感度特征等方面要优于传统方法处理的处理结果,因而更符合人类视觉系统特征,更易于人眼视觉系统全面了解低频UWBSAR图像表征的场景信息。结论与传统方法相比,该算法能自适应压缩图像动态范围,处理耗时短,所得图像细节突出,适于对低频UWBSAR图像数据实时处理。

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