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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.
In essence, it consists of a black-and-white emulsion on a film base covered with microscopically narrow red, green and blue filter stripes. [ 1 ] [ 2 ] It was instant in the sense that it could be very quickly and easily developed in the Polavision processing unit after it was removed from the Polavision camera, ready for viewing in only a few ...
In 1947 Edwin H. Land introduced the Polaroid-Land process. [4] The first instant films produced sepia tone photos. [5] A negative sheet is exposed inside the camera, then lined up with a positive sheet and squeezed through a set of rollers which spread a reagent between the two layers, creating a developing film "sandwich".
The two images are projected through different polarizers and superimposed on the screen. This is a very cost-effective way to convert a theater for 3-D as all that is needed are the attachments and a non-depolarizing screen surface, rather than a conversion to digital 3-D projection. Thomson Technicolor currently produces an adapter of this ...
Polaroid: i-type film : available: N/A: 640: Instant: Print: General purpose instant color or black and white film. As with Fujifilm's Instax film, various frame styles are available. Netherlands: 107x 88mm Polaroid: 600 film: 2015-N/A: 640: Instant: Print: General purpose instant color or black and white film. Various frame styles. Netherlands ...
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