media Q18: What is Green Screen technology and what is it used for?
In its simplest form most people will be familiar with Green Screen from the weatherman on TV. The presenter is shot against a flat green background and software is then used to generate a matt or mask which allows the figure to be dropped against a different background (in this case weather map). Typically this is used as a quick way to place actors into different backgrounds. These can be computer generated as in sci-fi films or other pieces of film footage or even graphic design elements.
