2. Image copy

See: https://pillow.readthedocs.io/en/stable/reference/Image.html#PIL.Image.Image.copy

See: https://pillow.readthedocs.io/en/stable/reference/ImageChops.html#PIL.ImageChops.duplicate

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2.1. Copy

Use the Image.copy() method to copy an image. Use this method if you wish to paste things into an image, but still retain the original.

The code below first copies an image so the copy can be converted to greyscale.

from PIL import Image


def get_greyscale(img):
    imgd = img.copy()
    return imgd.convert('L')

with Image.open("test_images/crosses.png") as im:
    im1g = get_greyscale(im)
    im1g.save("image/copy.png")