Chromakeying has become an essential tool in video and film production. Typically, foreground footage is shot in front of a blue or green screen, and then that background color – the key color – is treated as transparent, allowing another image to be inserted. For example, when you see a television meteorologist in front of a weather map, that person is almost certainly posed in front of a green screen. The background is ‘keyed out’ and replaced by computer generated imagery.



Of course, if you choose poor settings, foreground areas may inadvertently be cut away as well. Good keying often requires judicious balance between ‘too much’ and ‘too little’. Let’s consider the tools TriCaster provides to help you achieve a great result.

Section 13.1

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