import cv2
import numpy as np

def menu():
  print("\Press the key correspondent to the filter: \n"
        "a - abs\n"
        "m - mean\n"
        "g - gauss\n"
        "v - vertical\n"
        "h - horizontal\n"
        "l - laplacian\n"
        "p - gaussian laplacian\n"
        "esc - quit\n")