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改进的南极洲陆地卫星影像镶嵌图

, PP. 131-142

Keywords: 陆地卫星,南极,冰盖,镶嵌图,遥感

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Abstract:

?研究改进LIMA数据处理方法,使用1073景Landsat7-ETM+数据制作了改进的南极洲陆地卫星影像镶嵌图.改进的镶嵌图较LIMA的优势体现在影像处理流程的3个方面:(1)DN值饱和溢出调整采用更高精度的线性回归方法;(2)利用每个像元的经纬度和影像中心点的拍摄时间逐像元计算太阳高度角,提高了太阳高度角的计算精度;(3)选择了更有效的GS融合方法,将更多的波段(波段5和7)加入融合产品的制作,在南极地类识别上优势更加明显.另外,以16bit进行存储的行星反射率产品很好的保持了冰雪表面的高辐射分辨率.从目视效果、信息熵以及分类等方面与LIMA数据进行比较,结果表明本文数据具有明显的优势.

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