pre_scan_top_plane() Би get_region() 


get_region() Би pre_cut_region() Би cut_color()
             Би cut_region()
             Би rsorting()
             Би chk_region()
             Би nsorting()




RecursiveRegionSearch() 
	get_region_paint_first()
	start_search_tree()  tree.c
		search_tree()
			labeling()
			search_tree()