> Rotoscoping is an animation technique in which animators trace over footage, frame by frame, (...). Originally, recorded live-action movie images were projected onto a frosted glass panel and re-drawn by an animator. This projection equipment is referred to as a rotoscope.
Much like a flip-book animation, frames were drawn on the outside of a cylinder. The cylinder was rotated to get the apparent effect of motion, hence rotoscope. Ideally the rotation was linked to a shutter. I saw it on youtube or wikipedia.
