Chroma key compositing, or chroma keying, is a special effects / post-production technique for compositing (layering) two images or video streams together based on color hues. Skip to content ...

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 ...

(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 ...