Given a set of images from the project thisartworkdoesnotexist.com, this script generates 16 imagens combining symmetries extracts from the image's quadrants.

img_symmetry.py

# Author: Berin
# Sketches repo: https://github.com/berinhard/sketches
# requirements: pillow tqdm
import os
from multiprocessing import Pool
from PIL import Image, ImageOps
from pathlib import Path
from tqdm import tqdm
import shutil

W, H = 800, 800
DIMENSION = (W, H)

def gen_quadrant_symmetry(base_quadrant):
    w, h = base_quadrant.size
    positions = [
        (0, 0),
        (w, 0),
        (0, h),
        (w, h),
    ]

    output = Image.new("RGB", (w * 2, h * 2))

    for i, pos in enumerate(positions):
        w, h = pos
        quadrant_symmetry = base_quadrant.copy()
        if h > 0:
            quadrant_symmetry = quadrant_symmetry.transpose(Image.FLIP_TOP_BOTTOM)
        if w > 0:
            quadrant_symmetry = quadrant_symmetry.transpose(Image.FLIP_LEFT_RIGHT)

        output.paste(quadrant_symmetry, pos)

    return output

def save_region_symmetry(img, region_box, filename, transpose_method=None):
    quadrant_img = img.crop(region_box)
    if transpose_method  is not None:
        quadrant_img = quadrant_img.transpose(transpose_method)

    symmetry = gen_quadrant_symmetry(quadrant_img)
    symmetry.save(filename)

if __name__ == "__main__":
    with Pool(16) as p:
        artworks = Path("/home/bernardo/workspace/ai-faces/this_artwork_does_not_exist/")
        output_dir = Path("/home/bernardo/envs/dark_symmetry/output/")
        if not output_dir.exists():
            os.mkdir(output_dir)

        for image_path in tqdm(artworks.iterdir(), total=2048):
            img_num = int(image_path.name.split(".")[0])
            img_num = f"{img_num:04d}"
            img_dir = output_dir / img_num
            if not img_dir.exists():
                os.mkdir(img_dir)
            shutil.copyfile(image_path, img_dir / f"{img_num}{image_path.suffix}")

            img = Image.open(image_path).resize(DIMENSION)
            quadrants_regions = [
                (0, 0, W//2, H//2),
                (W//2, 0, W, H//2),
                (0, H//2, W//2, H),
                (W//2, H//2, W, H),
            ]

            counter = 0
            for region_box in quadrants_regions:
                transpose_methods = [
                    None,
                    Image.ROTATE_90,   # 2
                    Image.ROTATE_180,  # 3
                    Image.ROTATE_270,  # 4
                ]
                args = []
                for method in transpose_methods:
                    counter += 1
                    filename = img_dir / f"{img_num}-out-{counter:02d}.png"
                    args.append([img, region_box, filename, method])

                p.starmap(save_region_symmetry, args)