基于ETM图像的山地水体提取方法研究  

Water Extraction Method Based on ETM Image of Mountain

作　　者：王伟武[1] 朱霞[1] 孙跃池[2,3] 蒋建军[2] 

机构地区：[1]浙江大学城市规划工程与信息技术研究所,杭州310058 [2]南京师范大学地理科学学院,南京210000 [3]吉林省东丰县小四平镇人民政府,辽源136300

出　　处：《系统仿真学报》2013年第9期2196-2200,2205,共6页Journal of System Simulation

摘　　要：对遥感影像的水体信息进行自动半自动提取方法的相关研究。庐山实验区属于山地,卫星图像上存在着山体阴影,阴影的存在影响了水体信息的提取。如何减弱和消除山体阴影的影响,是实现计算机对山地地区水体信息提取的关键。在以庐山西北部以及八里湖和赛湖为研究区的实验中,以Landsat ETM+影像作为数据源,结合实验区具体情况,分别采用了单波段阈值法、多波段谱间关系法和阈值法的综合运用、水体指数法和阈值法的综合运用这三种方法,对研究区的水体信息进行提取,并对上述三种方法提取的结果进行了分析比较。结果表明,多波段谱间关系法与阈值的综合运用及水体指数法与阈值的综合运用较单波段法能够有效地去除山体阴影的影响,比较适合山地水体信息的提取。Automatic methods of extracting water from remote sensing image were researched primarily. Experimental area belongs to the Lushan Mountain. Shadows of mountain on image make it difficult to extract water body information accurately, so that how to eliminate and move the shadow becomes a key work in the process of extracting water body information. Taking the northwest of Lushan Mountain and Bali Lake and Sai Lake as study areas and landsat ETM＋ image as data source, single-band method, the relationship between multi-band spectral method and waterbody index method were used in order to extract the water body information in study area. At last, the precision of three methods was compared. The result shows that the relationship between multiband spectral - threshoM value methods and the waterbody index - threshold value methodscan effectively remove the impact of the shadow and can be aDolicable to mountain water extraction.

关 键 词：水体 山体阴影 光谱特性 谱间关系 水体指数 

分 类 号：X16[环境科学与工程—环境科学] TU984[建筑科学—城市规划与设计]