#!/usr/bin/python

import sys
import Image

# load image
im = Image.open("sortme.jpeg")
pix = im.load()

for y in range(0, 300, 100):
  for x in range(0, 400, 100):
    fingerprint = ""

    # create 4x3 array containing 4 pixel with 3 colors (RGB)
    check = pix[x+10,y+10] + pix[x+90,y+10] + pix[x+10,y+90] + pix[x+90,y+90]

    # loop though RGB-colors to create fingerprint
    # we need this because jpeg-converting seems to make colors differ
    for k in check:
      if k < 128:
        fingerprint = fingerprint + "0"
      if k >= 128:
        fingerprint = fingerprint + "1"

    # DEBUG OUTPUT: to create sorted-array manually
    print(str(x) + ":" + str(y) + " --> " + fingerprint)