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Percolation Cluster Fractals using PIL Floodfill (Python recipe) by FB36
ActiveState Code (http://code.activestate.com/recipes/577141/)

You can change the average size of the clusters by changing the maxIt value. (The calculation would take longer if you increase it though.)

Python, 22 lines
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# Random percolation cluster fractals
# FB - 201003243
from PIL import Image
from PIL import ImageDraw
import random
imgx = 512
imgy = 512
image = Image.new("RGB", (imgx, imgy))
maxIt = imgx * imgy / 1.25
for i in range(maxIt):
    x = random.randint(0, imgx - 1)
    y = random.randint(0, imgy - 1)
    r = random.randint(1, 255)
    g = random.randint(1, 255)
    b = random.randint(1, 255)
    r2 = random.randint(1, 255)
    g2 = random.randint(1, 255)
    b2 = random.randint(1, 255)
    image.putpixel((x, y), (r, g, b))
    ImageDraw.floodfill(image, (x, y), (r2, g2, b2), (0, 0, 0))

image.save("percolation.png", "PNG")
Tags: fractal, graphics, image, math

1 comment

John Hammink 13 years, 9 months ago  # | flag

When I ran this code in my IDLE (i've got 2.65 with all the necessary libs installed), I got:

Warning (from warnings module): File "/Users/johnhammink/Documents/Random_Percolation_Cluster_Fractals.py", line 11 for i in range(maxIt): DeprecationWarning: integer argument expected, got float

I tried importing cmath and math but that didn't help :P