You'll maybe complain that this site is degenerating into a mingle-mangle of bug descriptions, but if you've ever had a pesky problem and couldn't find anything about it on the web, you'll understand my urge to document such things for the fellow hackers.
Here the story goes: SimpleCV is a Python framework trying to provide a simple interface to both OpenCV* an PIL**. There's even a small book about it. I first installed version 1.2 on my computer, but then wanted to upgrade to 1.3 as there were some segmentation algorithms added (graph-cut etc.) which I wanted to use. Unfortunately, as I installed the new SimpleCV 1.3 and then tried to run my script written for version 1.2 I got:
WARNING: You need the python image library to save by filehandlewhen I tried to display any image. Deinstallation of both versions an clean install followed, but nothing changed. Googling for solution didn't help either. What should we do? Just fix it by yourself! The solution is simple. Well, just open this file:
C:\Python27\Lib\site-packages\SimpleCV\base.pyand change the following line***:
from Image.GifImagePlugin import getheader, getdatainto:
from GifImagePlugin import getheader, getdataSo, that's it! And happy OpenCV hacking!
PS: PIL seems to be generally a difficult library to use on Windows. If you follow their own docs an write something like
from PIL import Imageit won't work! You have to use the little bit confusing:
* OpenCV: a C++ library containing image processing algorithms. For Python there are wrappers exposing direct calls to it, but they aren't that easy to be used directly.
** PIL: the "python image library " from the warning message - the best know imaging library for Python, however it isn't self-contained. You'll need several other libraries like sciPy etc.
*** somehow for Windows distribution the GifImagePlugin isn't a subpackage of Image, and the PIL package just isn't there to be used as prefix! Despite the warning, the problem isn't lack of the PIL installation, but failure to find one of it's subpackages.