人民长江2017，Vol.48Issue(24)：111-116,6.DOI:10.16232/j.cnki.1001-4179.2017.24.022
基于多光谱影像的水体自动提取方法比较研究
Comparison on water-body information extraction methods based on multi-spectral remote sensing image
摘要
Abstract
In this paper, Poyang Lake wetland and nearby water zone were taken as the study area, single band threshold method,Normalized Difference Water Index method(NDWI),Modified Normalized Difference Water Index method(MNDWI) and New Water Index method(NWI)were applied respectively to extract water body information based on Landsat OLI images. Then the results of water body extraction were compared according to two aspects of water error -extraction rate and area accura-cy.By considering the deficiency in determining the threshold value in previous extraction method,histogram trough method,Ot-su method and iterative method were used to calculate the threshold value.The results indicate that single band threshold method has poor extraction effect but other three water indexes methods can extract various water bodies.The histogram trough method is not satisfactory due to its poor performance in determination of threshold value,the threshold value calculated by iteration method and Otsu method is more accurately.Among all these methods,the combination of New Water Index method and Otsu method get the highest precision.关键词
水体提取/自动阈值/遥感影像/鄱阳湖湿地Key words
water body information extraction/automatic threshold/RS image/wetland of Poyang Lake分类
资源环境引用本文复制引用
邱煌奥,程朋根,甘田红..基于多光谱影像的水体自动提取方法比较研究[J].人民长江,2017,48(24):111-116,6.基金项目
国家自然科学基金资助项目(41161069) （41161069）
国家地理国情监测专项项目(JC201410) （JC201410）
广西空间信息与测绘重点实验室资助课题(13-051-14-18,11-031-08-26). （13-051-14-18,11-031-08-26）
