opencv learning (eighteen) open/close operation, morphological gradient morph-grad, top hat tophat, black hat blackhat// floodfill(), function to be understood (combined with mouse callback function operation) p234

0, morphologyEX() Morphology comprehensive application function (opening and closing operation, morphological gradient, top hat, black hat)

1, open operation open

2. Close operation close

3. Morphological Gradient Transport morph-grad

4, top hat operation tophat()

5, black hat operation blackhat()

6, floodfill ()

define

Floodfill (), the function to be understood (operated with the mouse callback function) reference book p234