天宫二号对地观测数据与Landsat8卫星遥感影像对比分析
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摘要
为客观评价天宫二号宽波段遥感影像质量情况,以天宫二号对地观测数据与Landsat8影像作为测试数据源,通过单波段灰度值、地物灰度值对比方法,分析比较可见光谱段范围内的光谱性能与应用潜力,最后采用最大似然法进行地物类型分类。结果表明:天宫二号宽波段遥感影像具有谱段丰富,分辨率低,单波段横向阈值宽且平缓的特点,适合于反演大范围且地物类型较为一致的地表信息。
In order to objectively evaluate the quality of Tiangong Ⅱ wide-band remote sensing image, the Tiangong Ⅱ ground observation data and Landsat 8 image are used as test data sources. The spectral performance and application potential in the visible spectral band are analyzed and compared by the contrast method of single-band gray value and ground object gray value. Finally, the maximum likelihood method is used to classify the ground object types.The results show that the wide-band remote sensing image of Tiangong Ⅱ has the characteristics of abundant spectral bands, low resolution, wide and gentle lateral threshold of single-band, and is suitable for inversion of large-scale surface information with more consistent types of objects.
In order to objectively evaluate the quality of Tiangong Ⅱ wide-band remote sensing image, the Tiangong Ⅱ ground observation data and Landsat 8 image are used as test data sources. The spectral performance and application potential in the visible spectral band are analyzed and compared by the contrast method of single-band gray value and ground object gray value. Finally, the maximum likelihood method is used to classify the ground object types.The results show that the wide-band remote sensing image of Tiangong Ⅱ has the characteristics of abundant spectral bands, low resolution, wide and gentle lateral threshold of single-band, and is suitable for inversion of large-scale surface information with more consistent types of objects.
引文
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[4]孙明,钟仕全,莫建飞,等.基于高分卫星遥感数据的广西中小流域地表植被特征分析[J].气象研究与应用,2017,38(1):79-81+86+173.
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[7]孙斌,李增元,郭中,等.高分一号与Landsat TM数据估算稀疏植被信息对比[J].遥感信息,2015,30(5):48-56.
[8]孙明,钟仕全,谢敏,等.天宫二号对地观测数据在生态评价中的应用研究[J].气象研究与应用,2018,39(4):38-41+107.
[9]王丽霞,卢雁,石磊.“环境一号”卫星在轨测试与应用能力分析[J].环境保护与循环经济,2009,29(4):48-51.
[10]邓书斌.遥感图像处理方法[M].北京:科学出版社,2010.
[11]王敏,高新华,陈思宇,等.基于Landsat8遥感影像的土地利用分类研究——以四川省红原县安曲示范区为例[J].草业科学,2015,32(5):694-701.
[12]余健.基于ZY-3影像的土地利用变化检测研究[D].东华理工大学,2018.