Why do you want to use a green screen in making a movie?

The reason why the green cloth is put in the background is that the fluorescent green is easier to separate from the foreground in the computer system, which is convenient for the later image synthesis.

In recent years, the green screen is used more in stunt shooting, because the fluorescent green used in the green screen is easier to separate from the foreground in the computer system, and at the same time, this color is brighter and it is not easy to produce black edges. In addition, most cameras' CMOS Bayer image arrays have twice as many green pixels as red and blue, with the strongest signal and the least noise, and contain most brightness information, which is convenient for later matting synthesis.

Extended data:

When filming in Europe, we usually use green screens. In Asia, blue screens are usually used. Because most Europeans have blue eyes, if you use a blue screen, it is easy to pick out the actors' eyes later.

Green screen is widely used in dynamic background synthesis of radio and television, as well as in film and photography creation. Green curtain technology does not have to use green curtain as background. In principle, it is enough to choose the color that the foreground subject does not have as the background. Using green screen technology correctly can not only extract the foreground correctly, but also extract the semi-transparent area and shadow area in the foreground.