working with raw image files

[kafooster]

Wanderer: by *.raw I mean images with .raw extension, pure pixel data
without header
http://en.wikipedia.org/wiki/Raw_image_format

That is a clear and nice code however I think Image.open cannot
handle .raw since i get error

    image1 = Image.open("hand.raw", "rb")
  File "D:\Python27\lib\site-packages\PIL\Image.py", line 1947, in
open
    raise ValueError("bad mode")
ValueError: bad mode