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浒苔是一种大型绿藻,大量浒苔爆发会严重影响景观,干扰旅游观光和水上运动的进行。本文利用NASA提供的MODIS02的250m分辨率影像,分别采用了比值法、归一化植被指数法和监督分类中的最小距离分类,提取了浒苔的信息,实验结果表明,三者都可以提取浒苔信息,但是比值法提取的结果最好,最小距离分类很难与薄云区分,必须加入人工目视解译,归一化植被指数可以区分出薄云,但是遗漏较多。
Enteromorpha is a large green algae, a large number of Enteromorpha outbreak will seriously affect the landscape, interfere with tourism and water sports. In this paper, using the MODIS02 250m resolution image provided by NASA, the ratio method, the normalized vegetation index method and the minimum distance classification in supervised classification are respectively used to extract the information of Enteromorpha. The experimental results show that all three can extract Moss information, but the ratio of the best extraction results, the smallest distance classification is difficult to distinguish with the thin cloud, you must join the artificial visual interpretation, the normalized vegetation index can distinguish between thin clouds, but missed more.