直方图双峰法在遥感影像水体提取中的研究与改进  

Research and improvement of histogram bimodal method in water body extraction from remote sensing images

作　　者：王茹月 周航宇 WANG Ruyue;ZHOU Hangyu(School of Computer Science&School of Cyberspace Science,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]湘潭大学计算机学院网络空间安全学院,湖南湘潭411105

出　　处：《测绘通报》2023年第9期77-81,共5页Bulletin of Surveying and Mapping

基　　金：湖湘高层次人才聚集工程-创新团队项目(2019RS1060)。

摘　　要：利用水体指数方法提取多光谱遥感数据中水域信息优势明显,应用广泛。然而在实现过程中,算法的选取依赖于特定的水域环境,移植性差。本文选取了我国东部5个地区冬夏两季的数据,基于Landsat 8/9卫星的光谱数据,使用改进的归一化水体指数(MNDWI)进行归一化处理,在此基础上研究了直方图双峰阈值法的不足之处并加以改进。试验结果表明,改进后的直方图双峰法提取水域信息精度明显提高,且不再依赖于特定的水域环境,适应性显著提高。Based on multispectral remote sensing data,the advantages of using the water body index method to extract watershed information are obvious and widely used.However,in the process of implementation,the selection of algorithm depends on the specific watershed environment,and most of the current studies adopt specific algorithms based on a given region with poor portability.In this paper,winter and summer data from five regions in eastern China are selected and normalized using the modified normalized water body index(MNDWI)based on the spectral data from Landsat 8/9 satellites,on which the shortcomings of the histogram bimodal threshold method are studied and improved.The experimental results show that the accuracy of the improved histogram bimodal method for extracting waters information is significantly improved,and it no longer depends on a specific waters environment,and its adaptability is significantly improved.

关 键 词：Landsat 8/9 直方图双峰法 MNDWI 自适应阈值 

分 类 号：P237[天文地球—摄影测量与遥感]