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Chroma key composting, or chroma keying, is a special effects / post-production technique for composting (layering) two images or video streams together based on color hues (chroma range). The technique has been used heavily in many fields to remove a background from the subject of a photo or video – particularly the news casting, motion picture and video game industries. A color range in the top layer is made transparent, revealing another image behind. The chroma keying technique is commonly used in video production and post-production. This technique is also referred to as color keying, color-separation overlay (CSO; primarily by the BBC[2]), or by various terms for specific color-related variants such as green screen, and blue screen – chroma keying can be done with backgrounds of any color that are uniform and distinct, but green and blue backgrounds are more commonly used because they differ most distinctly in hue from most human skin colors. No part of the subject being filmed or photographed may duplicate a color used in the background.[3]

title "Innovate with Green Screen! " 2024 by Kay Williams
under license"Creative Commons Attribution"

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What is Green Screen?

Practical Uses for Green Screens

Understanding Green Screen Effects

Removing Elements

Replacing the Background

Modern-Day Uses

How To: Green Screen for Schools

Innovate with Green Screen!

Created Feb. 7, 2024 by Kay Williams

How To: Green Screen for Schools

Ideas for Education

Level:: Upper Primary, Middle School, High School, College / Upper Division, Adult Education
Material Type:: Activity/Lab, Interactive, Lecture Notes, Teaching/Learning Strategy

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Williams , Kay. "Innovate with Green Screen! ". OER Commons. Institute for the Study of Knowledge Management in Education, 04 Apr. 2014. Web. 27 Nov. 2024. <https://oercommons.org/authoring/5377-innovate-with-green-screen>.

Williams , K. (2014, April 04). Innovate with Green Screen! . OER Commons. Retrieved November 27, 2024, from https://oercommons.org/authoring/5377-innovate-with-green-screen.

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Updated Apr 4, 2014 by Kay Williams

Created Apr 4, 2014 by Kay Williams

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