[1] Haris K, Efstratiadis S N, Maglaveras N, et al. Hybrid image segmentation using watersheds and fast region merging[J]. IEEE Trans on Image Processing,1998,7(12):1684-1699.
[2] Vincent L, Soille P. Watersheds in digital spaces: an efficient algorithm based on immersion simulations[J]. IEEE Trans on Pattern and Machine Intelligence, 1991,13(6):583-598.