o p e n c v - p y t h o n - h e a d l e s s = 4 . 1 . 2 . 3 0 
 
 n u m p y ~ = 1 . 1 9 . 1 
 
 g d a l = 3 . 1 . 3 
 
 s e t u p t o o l s ~ = 5 0 . 3 . 0 