摘要
选取厦门湾地区部分遥感图像作为试验区域,应用阈值法、谱间关系法、MNDWI指数法3种方法进行水体提取。将提取结果与同期实测水深数据对比,评价各种方法的提取精度。结果表明:MNDWI指数法兼具前两种方法的优点,能排除阴影和云层等信息的干扰,从而较为准确地提取水体。最后应用该方法对整个厦门湾地区的水体信息进行了提取,形成水体信息专题图,从而对厦门市的水体情况进行分析。
Selecting a part of remote sensing image in Xiamen esturay as the experimental area,three methods,threshold, bands relationship and MNDWI index were used in extraction of water. Comparing the results with depth data acquired synchronously,the extraction precision could be evaluated. The result indicated that the MNDWI index method,which had the advantages of other methods, could extract the water precisely excluding the information of shadow and cloud. Finally the whole water in Xiamen estuary was extracted by using this method. Then wecan analyze the water information in city of Xiamen according to the thematic map of water.
出处
《水科学与工程技术》
2008年第B10期52-54,共3页
Water Sciences and Engineering Technology
关键词
水体提取
闽值法
谱间关系法
MNDWI指数法
精度评价
extraction of water
threshold method
bands relationship method
MNDWI index method
precision evaluation
