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The current version is the fourth generation of the Primatte technology and has features such as ‘Auto-Compute’ that automatically detects the backing screen color, eliminates it and does clean-up on the foreground and backing screen area noise. It is available on the Microsoft Windows, Red Hat Linux, SGI IRIX and the Apple Macintosh platforms.
Sometimes a shadow can be used to create a visual effect. Areas of the blue screen or green screen with a shadow on them can be replaced with a darker version of the desired background video image, making it look like the person is casting a shadow on them. Any spill of the chroma key colour will make the result look unnatural.
Live-action shooting for compositing is variously called "chroma key", "blue screen", "green screen" and other names. Today, most compositing is achieved through digital image manipulation. Pre- digital compositing techniques, however, go back as far as the trick films of Georges Méliès in the late 19th century, and some are still in use.
Chroma keying, commonly done with a green screen, allows a subject to appear composited against the background. As digital video editing advanced, visual effects became possible, and is part of the standard toolkit, usually found in prosumer and professional grade software.
Amiga was one of the first commercial computer platforms to allow amateur and professional video editing, due to its capability to connect to TV sets and video codecs and deal with Chroma-Key, Genlock signal, at full screen with overscan features, and a good noise-gain ratio.
Green screen compositing, or more generally chroma key compositing, is a technique for combining two still images or video frames. Green screen may also refer to: Green-screen display, a monochrome CRT computer display; GreenScreen Interactive Software, a publisher of video games
Blue screen, Blue Screen or bluescreen may refer to: Chroma key or blue-screen compositing, a technique for combining two still images or video frames;
Depending on how intricate the "edge" is this may be more or less difficult to do cleanly. For example, individual hairs can require a lot of work. Hence the use of the "green screen" technique (chroma key) which allows one to easily remove the background.
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