摘要
遥感技术在水体监测方面已有成熟应用,风云三号是我国自主研发卫星,时间分辨率高、覆盖范围广,能短时间内完整监测大范围水体。针对国产FY-3系列中分辨率卫星在水体信息自动化提取中的应用问题,以FY-3C MERSI影像为数据源,采用归一化差异水体指数(NDWI)结合大津算法(Otsu)进行阈值分割,提取出洱海水体边界,通过与采用相同方法的邻近时期Landsat 8 OLI影像水体提取结果的对比分析,发现二者水体边界整体拟合较好,面积误差为1.53%,FY-3C MERSI影像较为快速、准确地提取出了洱海水体。表明MERSI数据在水体信息自动化提取方面具有较高的应用价值和潜力,可用于较大面积湖泊的水体提取。
Remote sensing technology has been widely used in water body monitoring,FY-3 is a satellite independently developed by China,which has high time resolution and wide coverage,and can completely monitor a large area of water in a short time.Aiming at the application of domestic FY-3 series medium resolution satellites in automatic extraction of water body information,using FY-3C MERSI image as data source,using normalized differential water body index(NDWI)combined with Otsu algorithm for threshold segmentation,the water boundary of Erhai Lake is extracted.Through the comparison and analysis with the water body extraction result of Landsat 8 OLI image in the adjacent date using the same method,it is found that the boundary of the two water bodies is well fitted with an area error of 1.53%.The FY-3C MERSI image can extract Erhai lake water body quickly and accurately.The results show that MERSI data has high application value and potential in automatic extraction of water body information,and can be used in water body extraction of large area lakes.
作者
邹佳俊
温兴平
孙路遥
陈孟
ZOU Jia-jun;WEN Xing-ping;SUN Lu-yao;CHEN Meng(School of Land and Resources Engineering,Kunming University of Science and Technology;Yunnan Province Mineral Resources Prediction and Evaluation Engineering Laboratory)
出处
《软件》
2020年第4期96-101,共6页
Software
基金
国家自然科学基金项目(批准号:41101343)。
