南京林业大学学报（自然科学版）2012，Vol.36Issue(4)：29-35,7.
基于TM影像的水体信息提取方法研究
Study on information extraction method of water body based on TM imagery
摘要
Abstract
Taken Gaoyou Lake as the study area,and Thematic Mapper(TM)imagery as data sources,field investigation data,single-band threshold method,spectral relationship method,and water indices of simple ratio,Normalized Difference Water Index(NDWI),Modified Normalized Difference Water Index(MNDWI)and Combined Index of NDVI and MIR for Water Body Identification(CIWI)were applied respectively to extract information of water body.The results of information extraction by use of the six methods were compared to determine the optimal method for water body extraction.The results showed that spectral relationship method was easy to eliminate classification errors caused by shadows from the built-up while CIWI water index was easy to eliminate classification errors caused by built-up.Therefore,the combination of spectral relationship method and CIWI water index could achieve a higher accuracy of water body extraction effectively.The combination method presented in this study could reduce the misclassification and increase the accuracy of extraction of water body.The overall extraction accuracy of water bodies was 95.2 ％ and the commission rate was 4 ％,which suggested that the combination method was a simple and effective method with relatively high precision.关键词
高邮湖/TM影像/指数模型/水体信息提取/谱间关系法/混合水体指数Key words
Gaoyou Lake/TM imagery/index model/information extraction of water body/spectral relationship/CIWI分类
信息技术与安全科学引用本文复制引用
夏双,阮仁宗,颜梅春..基于TM影像的水体信息提取方法研究[J].南京林业大学学报（自然科学版）,2012,36(4):29-35,7.基金项目
江苏省自然科学基金项目(BK2008360) （BK2008360）
江苏省博士后基金项目 （）
河海大学人才引进基金项目 （）
中央高校基本科研业务费专项资金项目(2009B12714 （）
2009B11714) （）
