What is Green Screen Photography and Video?
Green screen photography and video is when a single colour (green or blue) is used as the background on photos or videos. With a technique called Chroma Key the single one plain colour background can be easily removed and replaced with any type of background the client wants. The weather reports on the news are made with green screens. The weather reporter stands in front of a green background and the background is digitally edited to portray a map to the viewers.
Check out Filmmaker’s IQ video on The Evolution of Green Screen.