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Updated 09/11/2012Home » Video Glossary » Chroma Key

Chroma Key

The Chroma Key process is based on the luminance key. In a luminance key, everything in the image over (or under) a set brightness level is keyedout and replaced by either another image, or a color from a color generator. Also known as Blue Screen Compositing, the Chroma Key Process was made famous by films such as star wars where spacecraft miniatures were composited onto starfield backgrounds.