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What Is Blue Screen?
Chroma keying is the process by which a video is shot, using a solid colour background and this is then digitally removed during the post-production process. Once the background is removed you can swap this with whatever footage you want to replace it with. One of the colours used for this is a blue screen. This is because it is a sharp contrast against the human skin tone. Compared to a green screen, a blue screen will take a lot of lights. Due to this difference in luminosity, the colour blue tends to spill less colour. The blue screen is perfect for darker and nighttime replication. The blue screen is cleaner to use than the green screen. But the issue is people wear the colour blue a lot more than green colour, and you have to be more careful that your actors don’t wear a blue colour.