A new algorithm for water area extracting from the remote sensing image based on morphologic method

In this paper,water area extracting experiments are made on RS image by Morphologic methods. Based on the combination of all kinds of basic Morphologic operators which leads to different top and bottom Hat transformations, filtering and thresholding enhancement are used to pre-process the image, by choosing appropriate structure elements,the image is segmented to complete the water area extracting with small gray variation.The results shows that,the method presented in this paper works better than the direct segmentation methods such as morphologic gradient method and mean method. The segmented image can be directly used in GIS after vector tracking.