def show_img(file_name, window_name='win'):
    img = cv2.imread(file_name)
    cv2.imshow(window_name, img)
    cv2.waitKey()
    cv2.destroyAllWindows()
def show_img(file_name, window_name='win'):
    img = cv2.imread(file_name)
    cv2.imshow(window_name, img)
    cv2.waitKey()
    cv2.destroyAllWindows()