利用TM影像Band1与Band7提取水体信息  

A study on information extraction of water body using band1 and band7 of TM imagery

作　　者：肖艳芳[1] 赵文吉[1] 朱琳[1] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048

出　　处：《测绘科学》2010年第5期226-227,216,共3页Science of Surveying and Mapping

基　　金：国家科技支撑计划重点项目(2007BAH15B02)

摘　　要：本文以北京地区TM影像为例,通过研究水体与其他地物在各个波段光谱特征的差异,对比分析常用的水体信息提取方法—NDWI和MNDWI,提出一种新的水体信息提取方法。该方法利用TM波段1和波段7归一化的比值-(Band1-Band7)/(Band1+Band7)提取水体信息。实验证明:该方法除了可以与NDWI和MNDWI一样提取植被区的水体以外,在城区水体提取中具有显著的优势。Using TM imagery of Beijing area,a new scheme for extracting information of water body has been proposed in this paper through the study on the difference of spectral characteristics between water body and other surface features,and the contrastive analysis on the common water extraction methods —NDWI and MNDWI.The new scheme extracted water body information by using normalized ratio of Band1and Band7—（Band1-Band7）/（Band1＋Band7）.The experiment demonstrated as follow： the new scheme could extract water body information within urban area much more precisely than NDWI and MNDWI,as well as could extract water body information within the plant footprint.

关 键 词：TM Band1 Band7 水体提取 城区水体 NDWI MNDWI 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]