chromakey


chro·ma·key

C5349060 (krō′mə-kē′)tr.v. chroma ·keyed, chroma ·key·ing, chroma ·keys To produce, replace, or include by chroma key.

chromakey

(ˈkrəʊməˌkiː) n (Broadcasting) (in colour television) a special effect in which a coloured background can be eliminated and a different background substituted. Also called: colour separation overlay