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以乾安湖泊群为研究对象,利用1989年和2001年乾安县TM影像分割得到两个时期的湖群对象,利用具有几何不变性的Radon域描绘子提取每个湖泊对象的形态特征向量,根据所定义的湖泊相似度指数计算出两个时期湖泊对象的相似度,定量地描述了湖泊对象的时空形态变化特征。通过对所建立的面向对象数据库的挖掘,得到了比传统的湖泊面积变化检测更加丰富有效的信息,为防止湖泊进一步萎缩制定有效的保护性措施提供了数量化依据。 更多还原

【Abstract】 Remote sensing technology is introduced by many related research as an efficient method to monitor dynamic change of lakes.But most of them only pay attention to lake area change,less to the information extraction of lake shape.In this paper,Qian′an Group Lakes are taken as the study objects,and lake objects of two periods are obtained by the segmentation of TM images in 1989 and 2001,then shape character vectors of each object are extracted using geometric invariance Radon descriptor.Similarity... 更多还原