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
        r = pixels[i, j][0]
        g = pixels[i, j][1]
        b = pixels[i, j][2]
        if i <= img.width / 2 and j <= img.height / 2:
            pixels[i,j] = (r + 255, g, b)
        if i <= img.width / 2 and j >= img.height / 2:
            pixels[i,j] = (r, g + 255,b)
        if i >= img.width / 2 and j <= img.height / 2:
            pixels[i,j] = (r, g, b + 255)
        if i >= img.width / 2 and j >= img.height / 2:
            pixels[i,j] = (r, g, b)
img.show()
img.save("13.jpg")