GF-5B AHSI高光谱数据质量评价与分析  

Evaluation and analysis of the data quality of GF-5B AHSI hyperspectral data

作　　者：周钰菊 张雪红 ZHOU Yuju;ZHANG Xuehong(School of Remote Sensing and Geomatics Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学遥感与测绘工程学院,南京210044

出　　处：《测绘工程》2025年第2期8-15,共8页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41871239);宁夏回族自治区自然科学基金项目(2024AC03420)。

摘　　要：鉴于高分五号02星(GF-5B)AHSI影像的数据质量评价方面研究尚少,文中使用辐射精度、信息熵、清晰度和信噪比4个指标,对GF-5B AHSI高光谱数据质量和可用性进行了评价与分析。结果表明,GF-5B AHSI影像的不同波段数据质量存在明显差异,第192~203波段、第245~264波段、第326~330波段共37个波段受大气和水汽影响严重,影像模糊无法利用,需舍弃;总体上可见近红外波段(VNIR)和短波红外波段(SWIR)第151~244波段效果最好可直接使用,SWIR的第265~310波段可用性一般,使用时需进行去噪声和条带处理,第311~325波段条带噪声较为明显且掩盖地物信息较多,建议使用前结合目视判读确定是否需要剔除。In view of the fact that there are few studies on the data quality evaluation of GF-5B AHSI image,this paper evaluates and analyzes the quality and availability of GF-5B AHSI hyperspectral data by using four indexes:radiation accuracy,information entropy,clarity and signal-to-noise ratio.The results show that there are significant differences in the data quality of different bands of GF-5B AHSI image.The 37 bands of 192~203,245~264,326~330 are severely affected by atmosphere and water vapor,rendering the images blurry and unusable,thus needing to be discarded.Overall,Visible near-infrared(VNIR)and shortwave infrared(SWIR)bands from 151 to 244 perform best and can be used directly.The usability of the SWIR bands from 265 to 310 is moderate,requiring denoising and striping correction during use.The bands from 311 to 325 exhibit significant striping noise and obscure a considerable amount of ground object information,so it is recommended to combine visual interpretation to determine whether to discard these bands before use.

关 键 词：高分五号02星 可见光短波红外高光谱相机 辐射精度 信息熵 信噪比 清晰度 

分 类 号：P237[天文地球—摄影测量与遥感]