多光谱水深反演模型推广至无实测数据海域的可行性探讨——以北岛和甘泉岛为例  

Feasibility study of extending multispectral depth retrieving model to sea area without in-situ data:a case study of North Island and Robert island

作　　者：赵露露 常伟纲 高磊 朱金山[1,2,3] ZHAO Lulu;CHANG Weigang;GAO Lei;ZHU Jinshan(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;State Key Laboratory of Geo-Information Engineering,Xi’an 710054,China;Key Laboratory of Surveying and Mapping Technology on Island and Reef,Department of Natural Resources,Qingdao,Shandong 266590,China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]地理信息工程国家重点实验室,西安710054 [3]自然资源部海岛(礁)测绘技术重点实验室,山东青岛266590

出　　处：《中国科技论文》2021年第5期542-548,共7页China Sciencepaper

基　　金：地理信息工程国家重点实验室开放基金资助项目(SKLGIE2017-Z-3-3);国家重点研发计划项目(2018YFC1405903)。

摘　　要：为了探究水质相同或相近前提下将多光谱水深反演模型推广至无实测数据海域的可行性,利用WorldView-2影像、GeoEye-1影像及相应实测水深数据于南海北岛海域、甘泉岛海域开展研究,在北岛海域提取3组样本数据,在甘泉岛海域提取1组样本数据。其中,利用北岛A组样本构建Stumpf比值模型、Lyzenga对数线性模型、比值统计模型,利用北岛B组、C组样本验证水深模型的反演精度。结果显示:各模型在海底类型相似的B组海域的验证精度较高,相关系数(r)、均方根误差(root mean squared error,RMSE)、平均绝对误差(mean absolute error,MAE)值依次仅约为0.9、1.1、0.9 m;在海底差异较大的C组区域,反演精度明显变差,r值低于0.7,RMSE、MAE值分别增加至2.2 m、1.6 m以上。此外,还将北岛A组样本的Stumpf比值模型推广至海底类型相似的甘泉岛海域,反演精度介于B组、C组精度之间,验证样本的r、RMSE、MAE值依次为0.821、1.961 m、1.420 m。研究结果表明:水质相同或相近前提下,海底类型极大地影响水深模型的反演精度;在海底类型相同或相似的海域,水深反演模型的推广可行性更高。Under the assumption of the same or similar water quality,to research the feasibility of extending multispectral water depth model to the area without in-situ data,WorldView-2 image,GeoEye-1 image and corresponding in-situ water depths were used to carry out research in the North Island sea area and Robert island sea area.Three groups of samples were extracted from the North Island sea area,and one group of samples was extracted from the Robert island sea area.Three models,Stumpf ratio model,Lyzenga log-linear model and ratio statistical model were constructed using Group A samples.These three models were applied on the Group B samples and the Group C samples.For Group B samples with similar bottom types as A,the retrieved accuracy are relatively good,and the correlation coefficient(r),root mean squared error(RMSE)and mean absolute error(MAE)are only about 0.9,1.1 m and 0.9 m.For Group C samples with large bottom difference as A,the accuracy gets obviously worse,r is less than 0.7,RMSE and MAE are more than 2.2 m and 1.6 m respectively.The Stumpf ratio model was also applied from Group A samples to the Robert Island area,which had similar bottom types as A.It achieves an acceptable accuracy,which is between that of Group B and Group C,with r,RMSE and MAE being 0.821,1.961 m and 1.420 m respectively.This research shows that,when the water quality is the same or similar,bottom types greatly affects the accuracy of water depth model extension.In the sea areas with the same or similar bottom types,the water depth retrieving model has better extension feasibility.

关 键 词：水深反演 多光谱遥感 Stumpf模型 Lyzenga模型 水深模型应用 

分 类 号：P237[天文地球—摄影测量与遥感]