1 #!/usr/bin/env python 2 3 import PIL.Image 4 import sys 5 6 def get_palette(): 7 l = [] 8 for i in range(0, 8): 9 r = ((i / 4) % 2) * 255; g = ((i / 2) % 2) * 255; b = (i % 2) * 255 10 for j in range(0, 32): 11 l.extend((r, g, b)) 12 13 imp = PIL.Image.new("P", (1, 1)) 14 imp.putpalette(l) 15 return imp 16 17 def dither(im, imp=None): 18 return im.quantize(palette=imp or get_palette()) 19 20 im = PIL.Image.open(sys.argv[1]) 21 im2 = dither(im) 22 im2.save(sys.argv[2]) 23 24 # vim: tabstop=4 expandtab shiftwidth=4