13. ImageFilter Smooth

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

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13.1. Smooth

Use the Image.filter(ImageFilter.SMOOTH) method to smooth an image.

from PIL import Image, ImageFilter

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

Unfiltered, smooth and smooth more are compared below: