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资源三号卫星多光谱图像特征分析和质量评价

DOI: 10.6046/gtzyyg.2014.01.04, PP. 17-24

Keywords: 资源三号卫星(ZY-3),多光谱,图像质量,灰度特征,纹理特征,地理要素视觉特征

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Abstract:

针对资源三号卫星(ZY-3)多光谱图像数据展开图像辐射特征和质量评价研究,通过与SPOT5HRG(highresolutiongeometric)多光谱数据对比分析,利用值域、均值和标准差等影像灰度统计信息分析ZY-3与SPOT5图像质量在不同地理区域的差异;通过计算相关系数分析波段之间的相关性,选取不同区域内的典型地物直方图进行对比,以反映多光谱影像的辐射特征;通过计算均质性、对比度、信息熵和角二阶矩评价ZY-3和SPOT5影像的纹理特征,并从影像地理要素视觉特征方面比较2种卫星图像的质量,作为用户选取和使用ZY-3图像的参考。实验结果表明:ZY-3多光谱图像的质量较好,在波段相关性方面,ZY-3在除植被外的水体和建筑物等要素信息提取能力上优于SPOT5;在纹理特征方面,ZY-3也比SPOT5有更好的显示效果,可用做中、小比例尺国土资源等领域应用的基础图像。

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