A rotoscope is an animation stand used to project a sequence of action frames against a surface. An artist could then trace a set of animation frames. For example, the background of the scene would be projected, and the actor is drawn, or edited onto this background -- i.e. compositing. This process can now be done with computers and a rotoscope is no longer used. The term rotoscoping is now used for the doctoring film or animation sequences frame-by-frame.