Green screen removed by chroma keyer so background element becomes visible.
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The green screen is replaced (chroma keyed, or keyed out) through a process of removing that specific color from the image. This creates a matte around the foreground subject that allows a background image to appear behind it. To learn more about this process, read through this blog from Virtual Studio.
Any color can be used for chroma keying. Green is ubiquitous because it’s the color least seen in clothing. |
Imperfections in the material, such as stains, creases, and folds casts shadows over the material. This creates differences in illumination levels on the material, which affects the color values recorded.
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A clean green screen with a minimum wrinkles creates a clean matte.
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Wrinkled, soiled screens produce an unstable matte.
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The basics of proper green screen lighting are:
The WikiHow webpage "How to Light a Green Screen" demonstrates in just a few steps how to set up and light your green screen to achieve great results. Also, consider shooting your footage outside on a sunny day if possible. Daylight produces bright and even light, ideal for great keys. |
Example of green screen lit by two soft lights
(Image by ThisDayToday is licensed under CC BY 2.0) |
© COPYRIGHT 2021. The Curators of the University of Missouri.
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