干涉成像光谱仪高光谱数据信息质量评估  

Assessment of the information quality of hyperspectral data from interference imaging spectrometer

作　　者：张霞[1] 帅通[1,2] 赵冬[1] 

机构地区：[1]中国科学院遥感应用研究所,北京100101 [2]中国科学院研究生院,北京100039

出　　处：《红外与毫米波学报》2012年第2期143-147,共5页Journal of Infrared and Millimeter Waves

基　　金：863国家高技术研究发展专项课题(2009AA122203);遥感科学国家重点实验室自由探索基金(10ZY-04)~~

摘　　要：从信噪比和信息熵两个方面对干涉成像光谱仪(IIM)高光谱数据的信息质量进行了评估,以期为IIM高光谱数据的深入应用提供参考依据.结果显示,IIM高光谱数据整体信息质量良好,中间波段影像信息质量优于两端波段,750 nm附近作为月表斜长石、辉石光谱曲线反射峰,表现出较好的信噪比和信息熵,这对提取月表元素与矿物具有重要意义,但作为辉石、斜长玻璃矿物吸收谷的930 nm波段附近则信息质量较差;前9个波段信息质量上升趋势明显,但整体较差,建议在使用时对噪声做着重处理;第一波段和最后一个波段信息质量较差,建议舍去.The information quality of the IIM hyperspectral data has been assessed from the aspects of signal-to-noise ratio and comentropy for the further applications of the IIM data.As the assessment results show,the information of the IIM data has a good quality as a whole.The quality of the information at the middle bands are much better than that at both ends of the bands.Corresponding to reflectance of plagioclase and the pyroxene,the peak in the spectrum centered around 750 nm exhibits high value of SNR and comentropy.This result is of great importance for retrieving elements and minerals on the lunar surface.However,the absorption valley,centered around 930 nm,exhibits poor information quality.Although the information quality of the first nine bands has an obvious trend of rising,the noise should be reduced carefully before use because of the low quality of them as a whole.Moreover,the information quality of the first band and the last one is too poor to use.

关 键 词：信噪比 信息熵 嫦娥一号 干涉成像光谱仪(IIM) 信息质量 

分 类 号：P184.54[天文地球—天文学]