无人机航片和卫星影像融合算法  

UAV and Satellite Image Fusion Algorithm

作　　者：牛丽峰 李轶鲲 杨树文 李小军 NIU Lifeng;LI Yikun;YANG Shuwen;LI Xiaojun(School of Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,兰州730070 [2]甘肃省地理国情监测工程实验室,兰州730070 [3]地理国情监测技术应用国家地方联合工程研究中心,兰州730070

出　　处：《遥感信息》2019年第4期74-78,共5页Remote Sensing Information

基　　金：国家重点研发计划(地球观测与导航)(2017YFB0504201);国家自然科学基金(41761082);兰州市人才创新创业项目(2015-RC-28);兰州交通大学优秀平台支持(201806)

摘　　要：针对基于无人机影像和卫星影像彩色变换(hue-intensity-saturation,HIS)时,传统确定I分量的方法具有光谱信息缺失和难以精确确定的问题,提出一种选取最优波段替代I分量的方法,改进了HIS变换方法。该方法对无人机影像与卫星影像做相关分析,根据相关性为无人机影像各波段给一个权重系数,波段相互运算,从而确定替换HIS融合中的I分量,进行HIS逆变换获得融合影像。通过与原始HIS变换和主成分分析(principal components analysis,PCA)的比较,改进的HIS变换实现了无人机航片影像和高分辨率卫星影像融合,一定程度上克服了原始HIS变换和PCA变换融合效果不佳,光谱扭曲程度较大,空间信息丰富度小的缺点。基于高分二号影像和无人机影像进行实验验证。实验表明,使用改进HIS变换进行融合,其融合效果比较好,具有光谱扭曲小、空间信息丰富、细节表现良好等优点。The traditional HIS method of determining the I component has the problem of missing spectral information and difficult to determine accurately based on UAV images and satellite images.The paper proposes a method to select the optimal band from UAV images,which improves the HIS method.This method analyzes the correlation between the UAV and the satellite image.According to the correlation,each band of the UAV image gives a weight coefficient,next calculate these bands,replace I component in the HIS fusion,and make the HIS inverse transformation to obtain the fusion image.By comparing with the original HIS transform and PCA transform,the UAV image band extracted by this method uses the HIS pan sharpening that realizes the information enhancement of the UAV image and high-resolution satellite image fusion,which overcomes the poor fusion effect of the original HIS transform and PCA transform.The experimental verification of this paper is based on high-resolution images and UAV images data.Results show that by using the method with the selected band,a better fusion effect can be obtained,and it has the advantages of small spectral distortion,rich spatial information and good detail performance.

关 键 词：无人机影像 高分辨率影像 影像融合 波段提取 HIS融合 

分 类 号：P237[天文地球—摄影测量与遥感]