Question

What is Chroma key?
what is CGI?

Answer 1

hey dear....!!

optical printer with two projectors, a film camera and a 'beam splitter', was used to combine the actor in front of a blue screen together with the background footage, one frame at a time. ... Some films make heavy use of chroma key to add backgrounds that are constructed entirely using computer-generated imagery (CGI).

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Answer 2

Chroma key compositing, or chroma keying, is a visual effects / post-production technique for compositing two images or video streams together based on color hues. 


Computer-generated imagery (CGI) is the application of computer graphics to create or contribute to images in art, printed media, video games, films, television program shorts, commercials, videos, and simulators.

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