What is the technology and principle of the current weather forecast display screen, so that even people can walk into the screen?

Use background synthesis. The background of the weather forecast studio is usually a color that is rarely used at ordinary times, and the whole background is this color. The pictures taken by the broadcaster in front of the camera are sent to the computer system of the behind-the-scenes producer to synthesize the artificial background. All the colors of the curtains fill the synthetic background, and people walk into the picture.

However, occasionally, I will be "lazy". For example, the announcer's clothes are accidentally dressed in the color similar to the curtain, and then the announcer becomes a monster without a human body, which is also one of the wonders that some radio stations can occasionally see.

Therefore, broadcasters have strict requirements on the color of the clothes they wear.