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Visual effects (sometimes abbreviated VFX) is the process by which imagery is created or manipulated outside the context of a live-action shot in filmmaking and video production. The integration of live-action footage and other live-action footage or CGI elements to create realistic imagery is called VFX.
Usually, mattes are used to combine a foreground image (e.g. actors on a set) with a background image (e.g. a scenic vista or a starfield with planets). In this case, the matte is the background painting. In film and stage, mattes can be physically huge sections of painted canvas, portraying large scenic expanses of landscapes.
Exchanging the background of a video clip with a Compositing tool A composite image of a basketball shot, with six basketballs added to the initial image to depict the arc of the shot. Compositing is the process or technique of combining visual elements from separate sources into single images, often to create the illusion that all those ...
The input images are referred to as the foreground image and the background image. Each image consists of the same number of pixels. Compositing is performed by mathematically combining information from the corresponding pixels from the two input images and recording the result in a third image, which is called the composited image.
Meteorologists on television often use a field monitor, to the side of the screen, to see where they are putting their hands against the background images. A newer technique is to project a faint image onto the screen. Some films make heavy use of chroma key to add backgrounds that are constructed entirely using computer-generated imagery (CGI ...
Front projection—the background is projected onto a two-way mirror, which reflects the image onto a highly reflective surface. A front projection effect is an in-camera visual effects process in film production for combining foreground performance with pre-filmed background footage.
File:Wakanda VFX in Black Panther (film).jpg File:WandaVision main-on-end title sequence.jpg File:Werewolf by Night (TV special) black and white and color comparison.jpg
It can be used to add motion blur or image stabilization effects to footage. This technique is sufficient to create realistic effects when the original footage does not include major changes in camera perspective. For example, a billboard deep in the background of a shot can often be replaced using two-dimensional tracking.