pythonでイメージファイル操作

Python Imaging Library (PIL)
http://www.pythonware.com/products/pil/

準備
sudo apt-get install python-imaging

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import Image

#Image.new('RGBA', (width, height), (R, G, B, A))
img = Image.new('RGBA', (800, 800), (255,255,255,255))

# img.getpixel( (x,y) )

r = 255
g = 0
b = 0

for x in range(100,200):
  for y in range(200,300):
    img.putpixel( (x,y), (r,g,b) )

img.save("image.png")