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The basic matting problem is defined as following: given an image , compute the foreground , background and alpha matte , such that the equation = + holds true. This equation has trivial solution A = 1 {\displaystyle A=1} , F = I {\displaystyle F=I} , B {\displaystyle B} is any image.
Matting also has some other fundamental limitations. The process cannot reconstruct parts of the background that are occluded by the foreground, and any sort of approximation will be limited. Additionally, the foreground and background of an image still have an effect on each other due to shadows being cast and light being reflected between them.
Open matte example with a slight shift of the image section upwards. Aspect ratio 2.35:1 versus 1.85:1 Open matte is a filming technique that involves matting out the top and bottom of the film frame in the movie projector (known as a soft matte ) for the widescreen theatrical release and then scanning the film without a matte (at Academy ratio ...
Putting mats in a frame is called matting, a term which can also usually be used interchangeably with mat. The French term, occasionally used in English, is passe-partout . A picture (a photo or print, drawing, etc.) is placed beneath it, with the cutout framing it.
For motion pictures originally recorded on film, high-quality video conversions called "digital intermediates" enable compositing and other operations of computerized post production. Digital compositing is a type of matting, and one of four basic compositing methods.
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