Crop the surrounding whitespace from an image with python

crop_surrounding_whitespace.py

"""
Taken from here:
https://github.com/thumbor/thumbor/issues/116
"""

def crop_surrounding_whitespace(image):
    """Remove surrounding empty space around an image.

    This implemenation assumes that the surrounding space has the same colour
    as the top leftmost pixel.

    :param image: PIL image
    :rtype: PIL image
    """
    bg = PIL.Image.new(image.mode, image.size, image.getpixel((0, 0)))
    diff = PIL.ImageChops.difference(image, bg)
    bbox = diff.getbbox()
    if not bbox:
        return image
    return image.crop(bbox)