13. ImageChops logical_or

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

13.1. Logical_or

Use the ImageChops.logical_or(image1, image2) method to return an image that is a Logical OR between two images.
Both of the images must have mode “1”.
The code below, first converts the images to black and white by first converting to greyscale using .convert(‘L’). Then the .point(point_function, mode=’1’) method is used to convert to black and white.
out = ((image1 or image2) % MAX)
from PIL import Image, ImageChops


def point_function(x):
    if x > 254:
        return 255
    else:
        return 0


def get_black_and_white(img):
    imgd = ImageChops.duplicate(img)
    return imgd.convert('L').point(point_function, mode='1')


with Image.open("test_images/crosses.png") as im1:
    im1bw = get_black_and_white(im1)
    with Image.open("test_images/circles.png") as im2:
        im2bw = get_black_and_white(im2)
        im_out = ImageChops.logical_or(im1bw, im2bw)
        im_out.save("chops/logical_or.png")
../_images/compare_logical_or.png