ABOUT GREEN SCREEN
A green screen, also known as chroma key compositing, is a technique used in film and video
production to replace the background of a shot with a digital image or video. This allows for the creation of special effects and the ability to place actors and objects in seemingly impossible environments.
The technique was first developed in the 1930s for use in weather broadcasts, but it wasn't until the 1970s and 1980s that it was widely adopted in the film and television industry. Today, green screen technology is an essential tool for visual effects artists, and is used in everything from Hollywood blockbusters to local news broadcasts.
The basic principle of green screen technology is to separate the subject of a shot from its background by using a specific color, typically green. This is done by filming the subject in front of a green screen, and then using software to remove the green pixels from the shot, leaving only the subject and a transparent background. The transparent background can then be replaced with any digital image or video, allowing the subject to appear in any environment.
There are a number of factors to consider when using green screen technology, such as lighting and camera positioning. Proper lighting is essential to achieving a clean key, with the green screen needing to be evenly lit to avoid shadows and color variations. Camera positioning is also important, as the green screen should be as far away from the subject as possible to avoid reflections and shadows