from PIL import Image, ImageFilter
try:
    im = Image.open("C:\\Users\\bossb\\Desktop\\21.png")
except FileNotFoundError:
    print("Файл не найден")

im = im.convert('RGB')
w, h = im.size

img = im
im = im.load()

p = [[(i, j) for j in range(h)] for i in range(w)]
d = [[1 for j in range(h)] for i in range(w)]

def get(x, y):
    if p[x][y] == (x, y):
        return (x, y)
    p[x][y] = get(p[x][y][0], p[x][y][1])
    return p[x][y]

def uni(a, b):
    a = get(a[0], a[1])
    b = get(b[0], b[1])
    if a == b:
        return
    if d[a[0]][a[1]] < d[b[0]][b[1]]:
        a, b = b, a
    p[b[0]][b[1]] = a
    d[a[0]][a[1]] += d[b[0]][b[1]]


def areConnected(a, b):
    return abs(a[0] - b[0]) + abs(a[1] - b[1]) + abs(a[2] - b[2]) < 15

for x in range(w):
    for y in range(h):
        for dx in range(2):
            for dy in range(2):
                if dx == 0 and dy == 0:
                    continue
                nx = x + dx
                ny = y + dy
                if nx < 0 or ny < 0 or nx >= w or ny >= h:
                    continue
                if areConnected(im[x, y], im[nx, ny]):
                    uni((x, y), (nx, ny))


mp = {}

for x in range(w):
    for y in range(h):
        par = get(x, y)
        if par not in mp:
            mp[par] = 0
        mp[par] += 1

sz = w * h
for value in mp:
    cnt = mp[value]
    x = int(255.0 * cnt / sz)
    if x > 100:
        x = 255
    else:
        x = 0
    if cnt < 3:
        x = 255
    mp[value] = (x, x, x)




for x in range(w):
    for y in range(h):
        im[x, y] = mp[get(x, y)]

img.show()