During class, when we are not busy working on our Idents, Music Videos and Title Sequences, we have been learning advanced After Effects techniques such as rotoscoping. In animation, rotoscoping is where a live-action movie image is projected onto glass panels and redrawn by the animator. With advancements in technology, this technique is now performed on the computer. In visual effects, rotoscoping is the technique of creating a matte (two or more image elements combined into one, final image) for an element of a live-action plate so that it may be used with a different background.
Our first exercise is with footage of a pair of hands tying shoe laces. Eventually we will rotoscope out the hands and build back in the missing areas of the shoes so that the shoe laces are essentially tying themselves.
Similar to the first, our second exercise is to rotoscope out the exposed skin of a tennis player but leave the clothing intact so it appears as if an invisible man is playing tennis. We will need to rebuild parts of the clothing eg. the insides of the sleeves and shorts, and parts of background plate. For the background plate we took a still from the footage and edited it in photoshop to eliminate the tennis player using the clone stamp tool. This was so we have a clean background pate to match up with the original to cover the hole created by the tennis player matte. To ensure that it matches up with the camera movement and doesn’t just slide around, we need to do some motion tracking here. Also, as there is bit of jerkiness in the camera movement in this footage, we need to stabilise the footage to assist in the editing process then add that camera movement back in once the editing stage has been completed.
Using a 3D model of the tennis racket to rebuild the original, we will need to match-move this so that it accurately follows the movement of the original tennis racket.
Additionally, we are learning green screen techniques and how to edit out a green screen background using keylight in After Effects.