I have numerous photos from a still image camera that I would like to merge into one photo to allow for easy spotting of motion or new objects. There is a bit of noise across the photos but not very much movement (Cameras are focused on areas that do not expect much to change).

If you were to merge these photos into one image, what would you use to do it provided the tool or library had to be relatively easy to call from a python script.

I believe this technique is called Image stacking.