低空无人机多光谱传感器辐射定标  

Radiometric Calibration of Low-altitude UAV Multispectral Sensor

作　　者：李慧娜[1] 陶醉 韩杰 张鹏飞[3] LI Huina;TAO Zui;HAN Jie;ZHANG Pengfei(School of Electrical and Mechanical Engineering(Engineering Training Center),Xuchang University,Xuchang 461000,China;Zhongke Landstar Information Technology Co.,Ltd.,Zhengzhou 450000,China;School of Urban and Environment Sciences,Xuchang University,Xuchang 461000,China)

机构地区：[1]许昌学院电气与机械工程学院(工程训练中心),河南许昌461000 [2]中科地星信息技术有限公司,河南郑州450000 [3]许昌学院城市与环境学院,河南许昌461000

出　　处：《许昌学院学报》2024年第2期127-129,共3页Journal of Xuchang University

基　　金：河南省高等学校重点科研项目计划(24B510013,24A420004);许昌学院国家级科研项目培育基金项目(2022GJPY007,2023GJPY019)。

摘　　要：高精度辐射定标对于无人机遥感数据定量化应用至关重要.以大疆精灵4 RTK多光谱传感器为例,基于多种典型地物和人工靶标,实现了该传感器全动态范围的辐射定标.在开展真实性检验后,探讨了曝光时间和光谱响应函数对定标结果的影响.研究表明,定标结果具有较高的定标精度,各波段RMSE均优于3.25%,且脉冲型光谱响应函数更适用于该传感器.另外,曝光时间会对中高亮度地物产生较大影响,容易出现过饱和现象.Radiometric calibration is essential for quantitative remote-sensing applications using UAV multispectral sensor.Taking the multispectral sensor onboard DJ P4 RTK UAV as investigated target,integrating various typical ground objects and artificial targets,this study implements radiometric calibration in full dynamic range of this sensor.After validating the calibration results,this study discusses the influences of exposure time and relative spectral responses on the calibration results.The results show the RMSEs in all bands are less than 3.25%.The pulse relative spectral response is more suitable for this sensor.Meanwhile,the different exposure time can cause the supersaturation for the middle-high brightness surface.

关 键 词：无人机 多光谱传感器 辐射定标 检验 

分 类 号：P208[天文地球—地图制图学与地理信息工程]