Crop an image in the centre using PIL

python python-imaging-library crop
user2401069 picture user2401069 · May 20, 2013 · Viewed 53.5k times · Source

How can I crop an image in the center? Because I know that the box is a 4-tuple defining the left, upper, right, and lower pixel coordinate but I don't know how to get these coordinates so it crops in the center.

Answer

Chris Clarke picture Chris Clarke · May 20, 2013

Assuming you know the size you would like to crop to (new_width X new_height):

import Image
im = Image.open(<your image>)
width, height = im.size   # Get dimensions

left = (width - new_width)/2
top = (height - new_height)/2
right = (width + new_width)/2
bottom = (height + new_height)/2

# Crop the center of the image
im = im.crop((left, top, right, bottom))

This will break if you attempt to crop a small image larger, but I'm going to assume you won't be trying that (Or that you can catch that case and not crop the image).

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