Python 2.7.14 (v2.7.14:84471935ed, Sep 16 2017, 20:19:30) [MSC v.1500 32 bit (Intel)] on win32
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>>> import numpy as np
>>> import cv2
>>> a = np.arange(5*5).reshape(5,-1)
>>> a
array([[ 0,  1,  2,  3,  4],
       [ 5,  6,  7,  8,  9],
       [10, 11, 12, 13, 14],
       [15, 16, 17, 18, 19],
       [20, 21, 22, 23, 24]])
>>> cv2.resize(a, (0, 0), fx=0.5, fy=0.5, interpolation=cv2.INTER_NEAREST)
array([[ 0,  2],
       [10, 12]])
>>> a = np.arange(4*6).reshape(4,-1)
>>> a
array([[ 0,  1,  2,  3,  4,  5],
       [ 6,  7,  8,  9, 10, 11],
       [12, 13, 14, 15, 16, 17],
       [18, 19, 20, 21, 22, 23]])
>>> cv2.resize(a, (0, 0), fx=0.5, fy=0.5, interpolation=cv2.INTER_NEAREST)
array([[ 0,  2,  4],
       [12, 14, 16]])