import random
from PIL import Image

img = Image.open("56.jpg")

pixels = img.load()
maxLoad = img.width * img.height
onePer = maxLoad / 100
k = 0
factor = random.randint(0,100)
for i in range(img.width):
    for j in range(img.height):
        if(i*j>k*10*onePer):
            print("Обработано", k*10, "%" )
            k+=1
        rand = random.randint(-factor, factor)
        r = pixels[i, j][0] + rand
        g = pixels[i, j][1] + rand
        b = pixels[i, j][2] + rand
        a = (r + g + b) // 3
        if (a > 127):
            r = 255
            g = 255
            b = 255
        else:
            r = 0
            g = 0
            b = 0
        pixels[i, j] = (r, g, b)
img.show()
img.save("13.jpg")