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Chroma Key

Chroma keying is the effect we often refer to as "Green Screening" or in the case of our lab, "Blue Screening"

Chroma keying is a technique used for combining two frames or images by replacing a color or a color range in one frame with that from the another frame.

It is often used in film industry to replace a scene's background by using a blue or green screen as the initial background and placing the actor in the foreground. The principle behind chroma keying is that the color blue is the opposite color of skin tone, so a distinction between the two is very clear, making it easier to select the color without worrying about any part of the actor being included in the selection. The whole blue selection is then replaced with another frame as the background.









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