In [1]:

    

import numpy as np


    

In [2]:

    

np.random.seed(0)


    

In [3]:

    

image = np.random.randint(1, 10, (3, 3))


    

In [4]:

    

image


    

    
Out[4]:





array([[6, 1, 4],
       [4, 8, 4],
       [6, 3, 5]])

In [6]:

    

np.pad(image, (1, 1), 'constant')


    

    
Out[6]:





array([[0, 0, 0, 0, 0],
       [0, 6, 1, 4, 0],
       [0, 4, 8, 4, 0],
       [0, 6, 3, 5, 0],
       [0, 0, 0, 0, 0]])

In [13]:

    

pad = 2


    

In [14]:

    

np.pad(image, ((pad, pad), (pad, pad)), 'constant')


    

    
Out[14]:





array([[0, 0, 0, 0, 0, 0, 0],
       [0, 0, 0, 0, 0, 0, 0],
       [0, 0, 6, 1, 4, 0, 0],
       [0, 0, 4, 8, 4, 0, 0],
       [0, 0, 6, 3, 5, 0, 0],
       [0, 0, 0, 0, 0, 0, 0],
       [0, 0, 0, 0, 0, 0, 0]])

In [ ]: