分水岭变换在遥感影像线状特征提取中的应用

Extraction of Linear Feature from Remote Sensing Image Based on Watershed Transform

在现有目标识别方法的基础上 ,提出一种结合目标的特性进行分水岭变换提取目标的方法。试验结果表明 ,这种方法可以有效地从遥感影像中提取线状特征。

This paper is focused on how to extract linear feature from remote sensing image by watershed transform with the help of the information about the linear object. The method extracting the information and incorporating it into the watershed transform is detailed. The method consists of the following steps. ① The marker point of the linear object is detected from the input image; ② These points are utilized to modify the gradient of the input image, which aims to suppress the regional minimum that does not correspond to the linear object; ③ The modified gradient image is segmented by the watershed transform. The segmented regions that correspond to the linear object were merged to represent the object.