Image Resizing using Nearest Interpolation

Computer Vision

Difficulty: 2 | Problem written by mesakarghm
Write a function img_resize(img) to resize an image (NumPy array) to half the width and half the height using the Pillow library. Return the rescaled image as another NumPy array. Use the Nearest Neighbor interpolation method while resizing the image. 

Sample Input:
<class 'numpy.ndarray'>
img: [[ 1 7 9 13 12] [11 21 61 81 91] [ 5 66 6 5 5]]

Expected Output:
<class 'numpy.ndarray'>
[[ 7 13] [66 5]]

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numpy has been already imported as np (import numpy as np)