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测绘学报  2013 

一种遥感图像信噪比评估和度量准则

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Keywords: 遥感图像,信噪比,辐亮度,匀值块选取,度量准则

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Abstract:

遥感图像的信噪比是在轨遥感器辐射性能的重要体现。对遥感图像信噪比的研究,能够很好地反映出在轨运行的不同卫星遥感器辐射性能的变化与衰退情况。由于在轨成像环境的差异,如果直接比较不同遥感图像间的信噪比关系,将与实际结果产生较大分歧。通过对遥感图像进行图像块划分、匀值图像块选取以及图像灰度值与成像时传感器入瞳辐亮度的关系转换,提出一种遥感图像间信噪比的评估和度量准则,以进行不同遥感图像信噪比的比较,实现全自动的信噪比评估及度量。通过分析我国卫星传感器在不同时期所成图像信噪比的关系,验证了提出的信噪比评估和度量准则的稳定可靠性。

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