This worked more as a removal than an on-the-fly replacement, and it was some of the most successful screen replacement technology of the time. The camera for these films had a custom prism that would split the image it received and strip away the yellow, so the filmed action could be easily placed over an entire background. Sodium vapors were used in some filming during the 60s and 70s to create an intense yellow screen with an extremely specific wavelength, which made the substitution of a background much simpler. However, there are still cases today where you can see a blue chroma screen in use rather than the more popular green chroma screens.Įarly Days of the Green Screen: Disney Yellow The intensity of the blue in the blue chroma screen color was very close to that of neon greens, which eventually led us to the use of that very familiar green screen.
This process was innovative, but somewhat slow as it combined the two reels one frame at a time. This was responsible for the techniques used to create the protagonist of the 1933 film “The Invisible Man.”īlue screens were created by production teams at RKO Radio Pictures in the late 1930s and first made its way onto film with the special effect of a genie flying out of a bottle in the 1940 “The Thief of Bagdad.” The blue screen use was an evolution of the travelling mattes technique, and initially they were overlaid on stills to create transitions from one scene to the next.Ī new device called an optical printer would work with two projectors, a beam splitter and a standard film camera to combine the actor who was working in front of a blue screen with a reel of an established background. This technique made it’s jump to film in 1903 with “The Great Train Robbery” when it was used for static backgrounds in one of cinema’s first ever blockbuster films.įrank Williams created a “travelling mattes” technique in 1918 that allowed the image replacements to move out of pure static backgrounds by compensating for the curve of an object, motion and camera movements. While green screen technology seems relatively new because it has a very heavy presence in modern entertainment, the underlying concept and similar technologies have been in use for more than 100 years.īack in 1898, George Albert Smith was replacing parts of images using a double exposure, which had a black cloth in place of the green screen and used incredibly high contrast in the images to make the black elements virtually disappear.
For example, HBO’s “Game of Thrones” often has its actors interact with bright green objects or costumes that are digitally removed during production and replaced with dragons, snakes, the undead and much more.
#CHROMA KEY LIVE PREVIEW TV#
Live feeds use chroma keying and a retractable green screen to do this video substitution, but it is also very common for your favorite TV shows to do this as well. There are also few natural items with this color, so there’s less of a chance that parts of your video will get unintentionally edited out. Neon green is easy for systems to differentiate and to filter out. The technical term for this process is color separation overlay, and it works in a variety of environments. This is why sometimes you’ll see a newsperson have part of their clothing disappear on the news - it was too close to the screen color and got filtered out too! The area that isn’t edited out, green in most cases, is not impacted so you get a clear picture of both videos or elements. Next, technology associated with a live video feed - in the case of your local meteorologist pointing to a weather map - or a video that’s being presently recorded is used to filter out that color and replace it with your background image. The image being replaced, such as the green background, needs be a single, solid and uniform color. Essentially you’re taking a video that will be your background and overlaying another image or video on top of that background. The use of a green screen, called a chroma key screen by people in “the biz,” is a method of placing two images or videos together to create a single image. You’ve never been able to do more from your home or office, and we’re here to help you with that green screen journey.
You can create a stunning YouTube video to gather followers or to build a new work presentation to crank up sales, train teams, showcase products and much more. Green screens and other chroma key screens enable you to picture yourself anywhere in the universe and turn that dream into reality with a little digital magic of your own.
#CHROMA KEY LIVE PREVIEW MOVIE#
Hollywood movie magic has a new home - anywhere you want - and it’s all thanks to the power of the green screen.
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