how to find the correlation between two images

Question

I need some help in trying to figure out something. I currently a python script which generates two images using the imshow method in matplotlib. My task is to find the correlation between these two images, or in other words the similarity between the two images. Both images are the same size and both use the jet colormap.
Let me know if this is clear enough or if i need to explain in more detail. It would be helpful if someone could provide an example code of how to do this.

Answer 1

Have you looked at the scipy signal processing kit?

from scipy import signal
cor = signal.correlate2d (im1, im2)

will calculate the 2D correlation for you.