I've got a large image and want to make several smaller pictures out of it
with a different scale each (let's say 100%, 50%, 25%). For example if the
original picture shows a man in front of a mountain, the 25% version of it
fits exactly the size of the smaller pictures, the 50% doesn't show the top
of the mountain and the 100% image only shows the man's face.
The zoom center is not the center of the original image (the man's face can
be in the lower left corner).
If you made a movie, you would have ...