Bin Han Bing-Kun Bao River Channel Extraction in SAR Images Using Level Sets Driven by Symmetric Kullback-Leibler Distance. 1-16 2022 60 IEEE Trans. Geosci. Remote. Sens. https://doi.org/10.1109/TGRS.2021.3130684 db/journals/tgrs/tgrs60.html#HanB22