Research rotoscoping

Rotoscoping is transferring an Image form a live action film into another sequence using Rotoscope. Rotoscoping is an animation technique where animators trace over every piece of footage, to use in live-action and animated films. Before film images were projected onto a frosted glass panel and re-drawn by an animator. This projection equipment is called a rotoscope, although it has now been replaced by computers.
The use of rotoscoping is to make films look realistic for instance to make a film where gulls are flying over a cliff, you would take a film of gulls flying in the sky and then filming a cliff, and then adding the footage of the gulls into the sequence with the cliff. 
The history of rotscoping was that the film used to be projected onto a frosted glass panel and the it would be re-drawn by an animator, although, now it has all been replaced by computers. It has been used in a lot of films. The reason of which animators do this is because it is cheaper and a lot easier if the animators cannot find the location in real life.
The film 'All Dogs Go To Heaven' uses rotoscoping, This film uses rotoscoping for the film is all animated and it needs rotoscoping to make sure that the films fits together and looks perfect i.e to make the film look realistic rather than animated to the audience. In 'All Dogs Go To Heaven' the rotscoping is well made as it doesn't look like two recordings have been put together in a sequence, it looks like the whole filming was took in one go.