How to invert colors of image with PIL (Python-Imaging)?

python python-imaging-library
bialix picture bialix · Mar 23, 2010 · Viewed 75.4k times · Source

I need to convert series of images drawn as white on black background letters to images where white and black are inverted (as negative). How can I achieve this using PIL?

Answer

Gary Kerr picture Gary Kerr · Mar 23, 2010

Try the following from the docs: http://effbot.org/imagingbook/imageops.htm

from PIL import Image
import PIL.ImageOps    

image = Image.open('your_image.png')

inverted_image = PIL.ImageOps.invert(image)

inverted_image.save('new_name.png')

Note: "The ImageOps module contains a number of 'ready-made' image processing operations. This module is somewhat experimental, and most operators only work on L and RGB images."

Related questions

Installing PIL with pip

I am trying to install PIL (the Python Imaging Library) using the command: sudo pip install pil but I get the following message: Downloading/unpacking PIL You are installing a potentially insecure and unverifiable file. Future versions of pip will …

Read More
How do I resize an image using PIL and maintain its aspect ratio?

Is there an obvious way to do this that I'm missing? I'm just trying to make thumbnails.

Read More
ImportError: No module named PIL

I use this command in the shell to install PIL: easy_install PIL then I run python and type this: import PIL. But I get this error: Traceback (most recent call last): File "<console>", line 1, in <module&…

Read More