湿地是陆地与水域交错而形成的水陆过渡地带，它对环境和社会经济的可持续发展有着举足轻重的作用，而这些作用的发挥必需有一定的水域为基础。鉴于多光谱遥感影像较高的定位精度和相对较低的价格，一直是湿地调查、研究与保护的重要数据源。首先探讨了水体特征提取过程，然后列举了具有代表性的提取方法，并对各个方法的特点进行了分析，总结了每种方法的优缺点和应用范围，最后阐述了湿地水体提取还需解决的问题，并对其研究前景进行了展望。%Wetland is a kind of eco-system which consists of interlaced waters and dry lands. It played an important role what must be based on some certain area of water in the environment and sustainable socio-economic development. In view of the high accuracy of multi spectral remote sens-ing image and relatively low price,it has been an important data source for wetland investigation,re-search and protection. This paper first describes the general approaches of water feature extraction, re-views the state-of-the-art of the wetland type water feature extraction methods,and summarized the advantages and disadvantages of each method and application scope. Finally,it expatiates the prob-lem that need to resolve of water extraction from remote sensing image,and research issues are rec-ommended for future studies.
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