Adding borders to an image using python

Question

I have a large number of images of a fixed size (say 500*500). I want to write a python script which will resize them to a fixed size (say 800*800) but will keep the origina

Answer 1

You can create a new image with the desired new size, and paste the old image in the center, then saving it. If you want, you can overwrite the original image (are you sure? ;o)

import Image

old_im = Image.open('someimage.jpg')
old_size = old_im.size

new_size = (800, 800)
new_im = Image.new("RGB", new_size)   ## luckily, this is already black!
new_im.paste(old_im, ((new_size[0]-old_size[0])/2,
                      (new_size[1]-old_size[1])/2))

new_im.show()
# new_im.save('someimage.jpg')