Put green cloth on the set because fluorescent green is more simple in the computer system and separated from the future. Together, this color is more bright and is not easy to have black edges. In addition to green, there are also blue sets.

In recent years, the green screen is more used for stunt shooting because the fluorescent green used by the green screen is more simple and separated from the perspective in the computer system. Together, this color is more bright and is not easy to have black edges. In the Bayer image array of CMOS of most other cameras, the green pixel is twice that of red and blue, with the strongest signal and the least noise, including most of the brightness information. Blue noise is the most and darkest, so blue screen is generally not recommended. In Asia, the blue screen is generally used, while in Europe, the green screen is generally used. The main reason is that the majority of Europeans have blue eyes. If the blue screen is used, the actor's eyes will be pulled out in the later stage.

Why do you see green cloth when shooting gags

Reason: This is mainly to separate the set from the perspective area, facilitate later matting and add computer special effects.

Application of curtain:

For example, there are two sets of blue films:

1. It is required to shoot military related scenes. Soldiers wear green military uniforms and are painted with green camouflage images; Under this condition, you need to choose the blue background screen.

2. In the future, there are many lenses in science fiction genre, and blue is used. At this time, it is necessary to consider using green as the setting.

Green screen principle:

In terms of light processing, because the shooting set is only a green screen, which is different from the film. In practical operation, the matting green set is separated from the front shooting area, so the most commonly used and safest way in lighting is to separate the set from the shooting area.

The first is the lighting set, that is, the green set used for matting should be brightened. It should be processed to the brightness conducive to later matting, so that the camera can correctly record and restore the set color.

In fact, the most important thing is to distribute the light evenly without shadow. When selecting green screen materials, try to prevent wrinkles, dark corners and other conditions on the screen.

But when it has problems, we can also find ways to make up for it: when shooting, the light distance between the front and back scenes should be placed as far as possible without affecting each other. Because there is a distance between the front and back scenes, and the lens focuses on the subject, the green screen is usually vague outside the focus, so even if it has some defects, it is not easy to see.

Article source: Jiangmen film and television production http：//www.sjttv.com