Learning immediately: https://edu.csdn.net/course/play/26281/327089?utm_source=blogtoedu
Watershed algorithm:
Segmentation dam: expansion causes aggregation is set, while located in step n submerged results.
There is a problem: too easy to split. Improvement: upon initial given marker, marker level from the start, avoid noise extrema divided small region.
Improved watershed algorithm: P algorithm.
