def main():
    #definindo as matrizes de filtro
    media = np.array([[1,1,1],
                      [1,1,1],
                      [1,1,1]], dtype=np.float32)

    gauss = np.array([[1,2,1],
                     [2,4,2],
                     [1,2,1]], dtype=np.float32)

    horizontal = np.array([[-1,0,1],
                           [-2,0,2],
                           [-1,0,1]], dtype=np.float32)

    vertical = np.array([[-1,-2,-1],
                         [0,0,0],
                         [1,2,1]], dtype=np.float32)

    laplacian = np.array([[0,-1,0],
                         [-1,4,-1],
                         [0,-1,0]], dtype=np.float32)