Aiming at the problem that the existing image segmentation methods cannot be accurately applied in sonar image segmentation

an improved level set sonar image segmentation method is proposed.LBF energy model is introduced and used for reference for its idea of level set evolution without re-initialization.To overcome negative effects caused by the complex background in sonar image

sonar image is preprocessed by morphological top-hat and bottom-hat transformation

and on these basis

the level set segmentation without re-initialization is carried up.Compare the improved level set method with the LBF energy model method in the simulation experiment

and the results show that the improved level set segmentation method is more suitable for sonar image segmentation with uneven background.