Why green screens are used to make movies? Why green screens are used to make movies?

1. The main purpose of using a green screen is to distinguish the background from the foreground, making it easier to cut out images and add computer special effects later.

2. Movie film is composed of three colors: red, green, and blue, so generally these three colors are acceptable for curtains. The complementary color of our skin tone is blue. In some scenes, using a blue curtain would violate the idea of ??using opposite colors rather than close colors, but to this day, these ideas are not so accurate.

3. Therefore, green will have its own advantages. When a blue object is used as the foreground, the adaptability of green is fully revealed. When drawing later, the green background color will appear It has an obvious reflectance, which is easier to operate than the blue curtain. When shooting video cameras, it is more sensitive to the channels built by the green curtain, which is conducive to creating better resolution and picture details.

4. Green is the best choice. Although blue is also common now, people have become accustomed to the name green screen, not to mention that green is suitable for post-production special effects. For example, a blockbuster film invites all It’s a foreign actor, and foreigners’ pupils usually appear blue. In this case, a green curtain was used, and the accuracy was improved to a higher level during post-cutting and production.

5. The fundamental reason why green curtains are most commonly used is that the camera can collect as much green information as possible. Nowadays, there are countless movies that rely on special effects to survive. These late-stage Rotos create the soul of a movie.

6. Judging from the Bayer array distribution map in modern photography technology, green occupies the largest proportion. The green information captured can be easily deleted with one click in the cutout to create special effects. Green The brightness is also very impressive, which can effectively improve the efficiency of post-production.