Chroma Key Green Screen Backdrop
What is Chroma Key?
A photo or video compositing technique used with green screens to merge two images or clips of footage together into a new visual effect. In simple words, this technique enables film and TV producers to record actors in front of a plain green backdrop, then replace the backdrop with special effects. Most familiar examples can be the weather person on TV news channels and animated movies and live action scenes.
Why Chroma Key Green?
Any solid colour will theoretically work. Yet green is preferred every time popularly as camera sensors can see it more accurately than any other colours. Green colour is more unique and it’s very far from skin tones than red or blue colours. Crucially it is a very less common colour worn in fashion and wardrobe, thus eliminating interference in photo and video footage.
Why is a Green Screen Green?
I have always wondered why a green screen green and not pink, blue or beige is. Because people are not green! In order for the technique to work, the background must use a colour that isn’t used anywhere else in the shot.
Blue Screens work almost as well. Because both green and blue are suitable for chroma — keying people. Green screen is widely used as there are more green-sensitive pixels in common camera designs and blue coloured clothes are harder to avoid than green ones. Also Green screen requires less light then blue screen because green screen reflects more light- again, as it has a brighter luminescence.
