3. ImageFilter GaussianBlur

See: https://pillow.readthedocs.io/en/stable/reference/ImageFilter.html#PIL.ImageFilter.GaussianBlur

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3.1. GaussianBlur

Use the Image.filter(ImageFilter.GaussianBlur(radius)) method to blur an image.

Blurs the image with a sequence of extended box filters, which approximates a Gaussian kernel.

from PIL import Image, ImageFilter

with Image.open("test_images/alph_blocks.png") as im:
    new_im = im.filter(ImageFilter.GaussianBlur(1))
    new_im.save("filters/GaussianBlur1.png")
    new_im = im.filter(ImageFilter.GaussianBlur(2))
    new_im.save("filters/GaussianBlur2.png")