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基于纹理的SAR图像感知质量评估

DOI: 10.3969/j.issn.1006-7043.201407004

Keywords: SAR图像, 纹理, 人类视觉系统, 图像质量评估, 感知特性, 灰度共生矩阵, 对比敏感度函数

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Abstract:

传统的SAR(合成孔径雷达)图像质量评价方法没有考虑视觉感知特性,导致主客观评价不一致。为了改善SAR图像质量评估方法的感知特性,提出了一种基于纹理的符合人类视觉系统感知性的SAR图像质量评估方法。由于SAR图像具有很强的纹理性,所以提取SAR图像的灰度共生矩阵并计算它的对比度,然后利用视觉对比敏感度函数与小波变换的倍频程特性来加权纹理特征的结构信息。仿真实验结果表明:具有感知特性的SAR图像质量评估方法较之传统方法更充分的利用了纹理结构特性,不仅能够反映出干扰对不同纹理区域的影响,而且能与人类视觉系统保持高度一致。通过对SAR图像进行感知质量评估可以为SAR的干扰效能提供更有效的依据,有利于干扰技术和干扰样式的优化。

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