利用混合水体指数模型(CIWI)提取滨海湿地水体的信息

RESEARCH ON EXTRACTING COASTAL WETLANDS WATER INFORMATION USING COMPOSITION CIWI WATER INDEX

根据对滨海湿地区域光谱特性分析和背景信息的反射特点,对主要的水体信息提取方法进行比较分析,将混合水体指数模型(CIWI)应用于TM遥感影像,针对滨海湿地区域水体信息进行提取实验,并与近年得到广泛应用和承认的水体指数模型:归一化差异水体指数(NDWI)、改进的归一化差异水体指数(MNDWI)等进行比较。实验证明CIWI的区分度最高,水体与植被、水体与城镇、植被与城镇之间的区分度分别为50.5%、29.2%与26.7%;水体、植被、城镇像元之间的差异比NDWI和MNDWI增大,减少了混淆信息的影响,对江苏盐城滨海湿地研究区的水体信息提取精度达到94.9%,实现了滨海湿地区域水体信息的准确快速提取。

According to the spectrum analysis and background information on the reflect characteristics of coastal wetland region,this paper firstly used the CIWI water index on the Coastal wetlands TM Images,and compared with the main methods of extracting water information,especially the extensive application waters indices:NDWI,MNDWI.It was proved that CIWI has the higher extracting level of difference between water,vegetation and town than NDWI and MNDWI.The data of the difference level were 50.5%(water & vegetat...