What is the principle of playing 3D movies shown in cinemas?

The film industry has developed very rapidly in recent years. With the resumption of the cinema a few days ago, people pay more and more attention to movies. There are two kinds of movies we watch in the cinema now: 2D movies and 3D movies. 2D movies are the most common screen movies we can see, but 3D movies are different. 3D movies make the objects we see extend out of the screen, and then present a three-dimensional image in front of our eyes. Compared with 2D movies, 3D movies will bring us more realism. So many people are curious, the screen is flat, how can the picture extend beyond the screen? In fact, this is mainly based on the principle that our two eyes have different images. Through the special lens, the picture we receive seems to be in reality, and there will be a more realistic viewing experience.

First of all, the principle of human eyes receiving visual signals. The human eye is like a convex lens, which can only receive luminous or reflective objects. Part of the light emitted by the object will be refracted to reach our retina, forming an inverted and reduced real image. At the same time, our brain will receive this signal, so that we can see the surrounding scenery clearly.

Second, the principle of 3D movies So how did 3D movies come into being? We know that there is a certain distance between people's eyes in space. And any point in space will be connected with our eyes to form a triangle. Therefore, the signal received by each of our eyes is biased in size and angle. In this way, the brain will automatically process this information and help us enhance the three-dimensional sense of the objects we see.

Third, how to make a 3D movie? When shooting 3D movies, we will use two cameras to simulate our human eyes. In this way, we can get movies from different angles, and after post-processing, we can form 3D movies we see, and we only need to wear special glasses when watching movies.

The above is an introduction to the principle of 3D film production, and you are welcome to add it.