顾及地物空间关系的卫星影像水系信息提取

为了更好地提取影像阴影部分的信息,本文采用一种顾及地物间空间关系的水系提取方法,将地物之间的空间关系与面向对象的方法相结合。通过多尺度分割算法生成同质的影像对象,利用决策树、隶属度函数和阴影与建筑物的邻接关系对水体进行提取。以昆明某区域影像为实验数据进行了试验,试验结果表明,所提出的方法可以有效解决阴影对水系提取造成的影响,大大提高了水系提取的精度。

Water extraction of satellite images considering space and feature relationship

In order to extract the information of images shadow well,this paper used a water extraction method taking the relationship between space and features into account,and it combined with the object-oriented method.The water information was extracted through the homogeneous images generated from multi-scale segmentation algorithm,the decision tree,the membership function and the adjacent relationship between shadows and buildings.A studied area in Kunming was taken into experiment,the results showed that the proposed method could effectively remove the impact of shadows on water,and improve greatly the extraction accuracy of the water.