Green screens, or chroma key, to give the effect its real name, relies on the background using a colour not present in the main subject of the shot. This can then be detected electronically or in ...

In simple terms, Chroma keying is the process of digitally removing a specific range of colors in a frame, allowing the ... chunk of color that the chroma key tool picks up during post-production.

(1) (Color Key) See prepress proof. (2) Also called "chroma key," it is a technique for superimposing one video image onto another. Widely used to place an interesting scene behind people such as ...