Hi, Irfan!

What kind of image analysis do you need? 

As a starting point, I would suggest you to use:

1) scikit-image -- a Python library for image analysis; 

2) openCV Python binding (cv2);

3) Pillow (+ NumPy/SciPy) -- as a toolset for "low level" image processing;  

Hope that helps

Thanks Dmitry Evgenevich Kislov. 

Working on 2D / 3D medical image analysis & segmentation techniques.

If you are working with MRI data (in particular brain data) have a look at nipy

http://nipy.org