Searching for a way to do Bitwise XOR on images

Question

I am looking for a way to get the Bitwise XOR of two images on the command line(or in another way that can be implemented in a program or script).

This should result in

Answer 1

Knowing that

A XOR B = (A AND NOT B) OR (NOT A AND B).

and that most of common image processing tools do have and, or and not operations the rest is quite easy :)

Working in Python, you could have a simple script performing the operation and even adding it as a plugin in the gimp ;)