摘要
为了使无人机多光谱影像能够真实地反映地面目标的光谱特征和实际地理位置,需要对无人机多光谱影像进行几何与辐射校正.结合摄影测量方法和经验线性定标法对多光谱影像进行几何与辐射校正,并基于地面实测数据对几何与辐射校正精度进行评价.结果表明:基于上述方法处理后的无人机多光谱遥感影像与地面实测数据一致性良好.基于摄影测量方法处理的影像在水平方向的定位精度为0.2 m,高程方向的定位精度为0.4 m,成果满足1∶500比例尺成图要求.基于经验线性定标法处理的无人机多光谱影像在大多数波段的可决系数大于0.9,成果可用于地物分类和植被识别等定量反演研究.
In order to make the UAV multispectral image can truly reflect the spectral characteristics of the ground target and the actual geographic location,geometric and radiometric corrections need to be performed on the UAV multispectral image.The geometric and radiometric corrections on multispectral images were performed combining the photogrammetry method and the empirical linear calibration method,and the accuracy of geometric and radiometric corrections was evaluated based on the measured data on the ground.The results show that the UAV multispectral remote sensing images processed by the above method are in good agreement with the ground measured data.The positioning accuracy of the images processed by the photogrammetry method in the horizontal direction is 0.2m,and the positioning accuracy in the elevation direction is 0.4m.The resultsmeet the 1∶500 scale mapping requirements.The determination coefficients of the UAV multispectral image which was dealt with the experience linear calibration method in most bands are greater than 0.9.The achievements can be used for quantitative inversion researches such as ground object classification and vegetation identification.
作者
冯晨阳
梁玉斌
张虎
何龙
孔祥玉
宋恩辉
崔铁军
FENG Chenyang;LIANG Yubin;ZHANG Hu;HE Long;KONG Xiangyu;SONG Enhui;CUI Tiejun(School of Geographic and Environmental Sciences,Tianjin Normal University,Tianjin 300387,China)
出处
《天津师范大学学报（自然科学版）》
CAS
北大核心
2021年第2期65-73,共9页
Journal of Tianjin Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(41971306)
天津师范大学博士基金资助项目(043-135202XB1620).
关键词
无人机
多光谱影像
几何校正
辐射校正
unmanned aerial vehicle(UAV)
multispectral imagery
geometric correction
radiometric calibration
