像元间光谱响应非均匀性与条带噪声的关系  

Relationship Between Spectral Response Non-Uniformity of Pixels and Stripe Noise

作　　者：李文力 李秀举 屠黄唯 闫语畅 韩昌佩[1,2] Li Wenli;Li Xiuju;Tu Huangwei;Yan Yuchang;Han Changpei(Key Laboratory of Infrared System Detection and Imaging Technology,Chinese Academy of Sciences,Shanghai 200083,China;Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院红外探测与成像技术重点实验室,上海200083 [2]中国科学院上海技术物理研究所,上海200083 [3]中国科学院大学,北京100049

出　　处：《光学学报》2022年第12期141-150,共10页Acta Optica Sinica

基　　金：中国科学院上海技术物理研究所创新基金(CX-262)。

摘　　要：基于黑体的在轨辐射定标是多通道扫描成像辐射计(AGRI)红外通道采用的辐射定标方案之一,AGRI某些长波红外通道的图像经过黑体定标后仍残留部分条带噪声,这将影响图像质量。分析了AGRI基于星上黑体的辐射定标模型,提出了通道内像元间光谱响应非均匀性的概念;对像元间光谱响应非均匀性与条带噪声的关系进行了仿真分析;基于分析结果,提出了一种利用均匀场景进行相对辐射定标的方法,并使用AGRI的成像数据,验证了该方法对抑制由像元间光谱响应非均匀性导致的条带噪声的有效性。On orbit radiometric calibration based on blackbody is one of the radiometric calibration schemes used in the infrared channel of the Advanced Geosynchronous Radiation Imager(AGRI).Some of the images from long wave infrared channels of AGRI still have some band noise after blackbody calibration,which will affect the image quality.In this paper,the radiometric calibration model of AGRI based on spaceborne blackbody is analyzed,and the concept of spectral response non-uniformity between pixels in the channel is proposed;then,the relationship between the non-uniformity of the spectral response between pixels and the band noise is simulated and analyzed.Finally,based on the analysis results,a method of relative radiometric calibration using a uniform scene is proposed,and the imaging data of AGRI are used to verify the effectiveness of this method to suppress the stripe noise caused by the non-uniformity of spectral response between pixels.

关 键 词：成像系统 黑体定标 光谱响应非均匀性 条带噪声 相对辐射定标 风云四号 

分 类 号：TP732.2[自动化与计算机技术—检测技术与自动化装置] TP751.1[自动化与计算机技术—控制科学与工程]