Automatic Water Segmentation Method in SAR ImagesUsing Multi-scale Level Set

In order to extract water from SAR images automatically,accurately and quickly,a novelwater segmentation algorithm combined multi-scale level set method with OTSU algorithm is proposedin this paper.Firstly,we introduced multi-scale framework into level set method,this technologyconsidering both global information and local information of the image.Moreover,considering thespeckle noise of SAR images,gamma model is defined for level set function,based on it,the segmen-tation result of OTSU algorithm is used to represent the initial segmentation curve.Finally,in orderto eliminate the influence of farmland and road,post-processing is considered in this paper.The ex-periments with real SAR images demonstrate the effectiveness of the new method.