part.py

from PIL import Image, ImageChops, ImageEnhance


def convert_to_ela_image(path, quality):
    filename = path
    resaved_filename = filename.split('.')[0] + '.resaved.jpg'
    im = Image.open(filename).convert('RGB')
    im.save(resaved_filename, 'JPEG', quality=quality)
    resaved_im = Image.open(resaved_filename)
    ela_im = ImageChops.difference(im, resaved_im)
    extrema = ela_im.getextrema()
    max_diff = max([ex[1] for ex in extrema])
    if max_diff == 0:
        max_diff = 1
    scale = 255.0 / max_diff

    ela_im = ImageEnhance.Brightness(ela_im).enhance(scale)
    return ela_im

img = convert_to_ela_image("trial.jpg",90)
img.save("ela.jpg",'JPEG', quality = 100);