4. ImageFilter BoxBlur

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

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4.1. BoxBlur

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

Blurs the image by setting each pixel to the average value of the pixels in a square box extending radius pixels in each direction.

from PIL import Image, ImageFilter

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