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River waterbody extraction from SAR images based on speckle reduction and multi-resolution topological analysis
Acta Geodaetica et Cartographica Sinica
Aiming at the discontinuity of river waterbody extraction from high-resolution SAR images caused by speckle noise and building occlusion, a river waterbody extraction method combining adaptive speckle reduction and multi-resolution topological analysis is proposed. Firstly, the Beta metric is introduced into the speckle reduction anisotropic diffusion to achieve adaptive speckle filtering of SAR images. Secondly, the local threshold segmentation and connected region identification are used todoi:10.11947/j.agcs.2022.20190395 doaj:d9fbbb483148422ea570f969fa6c8521 fatcat:gw5alek3bbefhj2jdskeixs45a