PRELIMINARY TASK & RESEARCH: research on Green screens

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A "green screen," also known as a chroma key screen, is a key tool in film and video production used to create visual effects and composite images. A large green backdrop placed in the background of a shot to allow for digital effects later. In Post-Production, the special effects department will edit the background from green to… anything they want with CGI (computer-generated imagery) or background footage called "plates." The screen can take up the entire background or just a portion of it, depending on what needs to be replaced.

  1. Chroma Keying: Green screens are used in conjunction with chroma keying technology. This process involves isolating a specific color (in this case, green) and making it transparent during post-production. By removing the green color, filmmakers can replace the background with a different image or video, creating the illusion that the subjects were filmed in a different location.

The first uses came in 1898 with George Albert Smith, using a black cloth to make objects “disappear.”

Perhaps the most well-known early use came during The Great Train Robbery (1903). Here, they painted train windows black, allowing for the addition of passing scenery later.

Green and blue are most frequently used for chroma key compositing because they don’t have any shades in common with natural human skin tones.The blue screen technique predates the green screen. In the 1930s and 1940s, filmmakers started using blue screens as an alternative to the more common black matte backgrounds. Blue screens had some advantages, but they also presented challenges, such as actors wearing blue costumes interfering with the process.While blue screens were initially more common, the shift to green screens began in the 1960s and 1970s. Green became a preferred color because it is less likely to match human skin tones, and it also works well with the color processing capabilities of early analog and digital video equipment.

What is it like to act in front of a blue or green screen? - Quora
image of The blue screen technique being used in the 2019 film the jungle book 

Blue Screen vs Green Screen Differences Explained | Blue screen, Greenscreen, Green screen backgrounds





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