天宫一号高光谱成像仪是目前中国空间分辨率和光谱综合指标最高的星载光谱成像仪.针对天宫一号高光谱数据,提出了一种基于波段相关检测的蚀变信息提取方法.该方法在对天宫一号高光谱数据进行波段相关检测提取蚀变异常特征波段的基础上,结合异常探测、端元提取和光谱匹配等方法的各自优势进行天高一号高光谱数据的蚀变信息提取.利用该法成功提取了天宫一号高光谱数据中的Al-OH矿物蚀变异常及4种蚀变矿物,结果表明该方法可以有效提取天宫一号高光谱数据中的蚀变信息,有助于天宫一号高光谱数据在地质矿产资源调查中发挥巨大的应用潜力.

Tiangong-1 hyperspectral imager is currently the highest spatial resolution and spectra composite indicator spatial spectral imager of China. To extract alteration information from Tiangong-1 hyperspectral data, an alteration information extraction method based on band correlation detection is proposed. This method was based on band correlation detection to select anomaly bands and then conducted alteration information extraction with the advantages of anomaly detection, endmember extraction, spectral matching and other methods. This new method successfully extracted the Al-OH mineral alteration anomaly information and four alteration minerals information of Tiangong-1 hyperspectral data. Findings of this research prove that the proposed method can effectively detect and extract alteration information of Tiangong-1 hyperspectral data and put forward its potential applications for geological mineral resources survey.