utils/vis_utils.py

import math
from typing import List

from PIL import Image


def get_image_grid(images: List[Image.Image]) -> Image:
    num_images = len(images)
    cols = int(math.ceil(math.sqrt(num_images)))
    rows = int(math.ceil(num_images / cols))
    width, height = images[0].size
    grid_image = Image.new('RGB', (cols * width, rows * height))
    for i, img in enumerate(images):
        x = i % cols
        y = i // cols
        grid_image.paste(img, (x * width, y * height))
    return grid_image