Many commercials and documentaries use a technique where a still photograph is panned or zoomed, and a parallax-like effect is applied. When zooming, some figures scale differently from others and a 3D effect is simulated.
What is this effect called, and how is it done?
Edit: I'm looking for the extra effect that's added beyond panning/zooming a still photograph that seems to allow you to see what was behind some objects. Or sometimes objects more in the foreground will become larger than before, covering up more of the objects behind them than before.