Why do you like to use the green barrier as the background for filming?

If you are a fan of Marvel comics, you must know that most of the shots of Marvel comics are done in front of "green cloth". The actors shot in front of the green set and added special effects later, which is the spectacular scene we saw in the cinema. Do you know why the green set is used in the film? The visual effects and running, flying and fighting scenes of superheroes in animated films are not real, and special effects are added to get such a cool picture.

In shooting, strategically place some broken objects (such as damaged cars and stones). ) Install a big green screen around the actors and behind them to replace all the elements you want to capture in the video, including actors and props.

After shooting video in this way, you can replace the green color in the background with any image or video in post-production, and use color key technology to simulate the flight and battle of superheroes. Chromaticity key is a kind of visual effect technology widely used in post-production, which superimposes images and videos on color-based images or videos. It can matting a specified color to look "transparent" and insert a specific background or animation in the "transparent" area.

With the rise of animation in the field of film and television, this technology has become a gold mine for digital graphics experts and designers in the film, news broadcast and video game industries. According to the requirements of graphics, it can be used for many purposes, but it is mainly used to delete and re-edit the real background and replace it with another image or material.

For example, in a weather forecast TV program, the host stands in the foreground with almost no features in the background, while when shooting the weather forecast, there is a big green or blue screen in the background. In post-production, the background is "transparent" and replaced by maps and various animations.

If the actor's clothes or props are the same color as the background during filming, then in post-production, things of the same color will be cut off, and then a strange hole or thing will appear in the picture, so we will choose green with the lowest utilization rate or appearance rate when choosing colors.