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Ethan, our ROCORI media student who made his debut with "The Battle between Socks & Shoes", is once again exploring the edge of videography. This week Ethan is experimenting with Bluescreen which he plans to incorporate into his next production.
(From Wikipedia, the free encyclopedia)
Bluescreen (also known as Chroma Key) is a term for
the filmmaking technique of shooting foreground action against an
evenly-lit monochomatic background for the purpose of removing the
background from the scene and replacing it with a different image or
scene. The term also refers to the visual effect resulting from this
technique as well as the colored screen itself (although it is often
not blue; for example, with greenscreen).
The key background color in the video signal is processed
out and overlayed with content from a different video signal -- such as
from a separate camera, a recorded video playback, or a digital source
-- a process called "compositing". Both digital and analog techniques exist for doing this. The image replacement may be done in production or in post-production.

A classic example of the technique is the television news weatherman
who on-screen appears to point at a map, but is in fact being recorded
standing in front of a blank screen. On either sides of this screen are
smaller televisions projecting a front view of the weather-caster, so
they know where and when to place their hands. These early television
effects were originally accomplished by a technique called chroma keying, but older analog methods have been increasingly supplanted by modern digital compositing techniques.
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