Extracting a sub array from a Numpy array

Question

I have an image that's been loaded using matplotlib.image.imread.

What's the best way to extract the section of the image that begins at left column 20, row 5, and ends at right column 25, row 10?

Kennet Celeste · Accepted Answer · 2016-11-02 06:19:59Z

1

What's the problem with img[5:10,20:25]?

import matplotlib.image as mi
import matplotlib.pyplot as plt


img = mi.imread('./3.png')
cropped =  img[5:10,20:25]
f,axarr = plt.subplots(2,1)
axarr[0].imshow(img)
axarr[1].imshow(cropped)
plt.show()

result:

answered Nov 2, 2016 at 6:19

Kennet Celeste

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