几种TM影像的水体自动提取方法比较

本文对几种常用的TM影像水体方法进行论述,并提出了两种水体自动提取方法,一种是将TM2+TM3>TM4+TM5的谱间关系法与IHS彩色空间构建模型相结合提取水体;另一种是基于卫星图像数据的LBV变换与归一化植被指数NDVI的遥感影像水体信息自动提取的方法。并通过实验比较几种方法的优点和缺点,IHS彩色空间构建模型的方法可以有效地提高细小水体提取的精度,LBV变换与NDVI相结合的方法可以准确地区分水体与低密度覆盖的水植混合区。

Comparison of several water-body information extraction methods in Landsat TM remote sensing image

The paper researches the common water-body information extraction methods in Landsat TM remote sensing image,and puts forward two new water body information extraction methods.One method can extract the water-body by uniting the formula TM2+TM3> TM4+TM5 with the model of IHS colorful space.The other method is based on the LBV transformation and the unitary vegetable index NDVI.The paper compares the advantages and disadvantages of several water-body information extraction methods by experiments.Model of IHS colorful space can improve the accuracy of the small water-body extraction.The other method can distinguish the water area with the low-density mixture of water and plant truly。