Now, with the announcement of almost every movie premiere, we see the “3D effect” on the poster. This innovation has become widespread in our country recently. However, the technology literally in a couple of years has earned a real popularity among cinema visitors. Three-dimensional image, a sense of presence and a lot of enthusiastic impressions - these are the main advantages of this effect. But what is 3D inherently? How did the developers achieve such an unusual presentation of a seemingly flat picture? Does this technology harm the human eye and brain? Let's figure it out.
The name 3D itself came from the abbreviated concept of “three-dimensional” or “three-dimensional”, if translated into Russian. It means a feature of the perception of the world through stereoscopic vision. Since each human eye transmits its image to the brain, they will be slightly different from each other. This can be easily verified by conducting a small experiment. Close both eyes in turn and you will immediately notice the difference. After all, there is a distance between them. But we do not perceive the image ambivalently, since the brain in thousandths of a second converts the received information into a whole picture. So much for natural 3D technology.
So that visitors to the cinema can feel the charm of this new product, the film itself must be shot using a special method. This is done through two different cameras, which are located at a small distance from each other, or with the help of one, but special. It has two lenses at once, allowing you to capture everything that happens in the same way as we see it with both eyes. When the footage is launched on the screen, the person sees a blurry, as if twofold picture. To understand what 3D is, he will need special glasses that will combine the captured frames from different cameras into one complete image. In this case, each eye should receive exactly that picture, which is designed specifically for him. Depending on how the film was shot, the scene will either go deep into the screen or move directly onto the viewer.
Now 3D technology even penetrates into our homes. Manufacturers of technology are actively introducing it into their devices, which are becoming adapted to transfer volumetric images. What is 3D at home? This is a viewing of specially shot films using this technology on full-fledged televisions, desktop computers, tablets or widescreen smartphones. At the same time, the creators of such new generation devices can use completely different methods for improving devices. Most often used anaglyphic glasses, which are familiar to everyone who at least once watched a 3D movie in a movie theater. One of their glass is blue, and the second is red. It is this feature that allows you to distinguish between images intended for different eyes. With these glasses, you can enjoy the effect of “presence”, even watching a movie on a regular TV.
If we talk about special screens and monitors, it will not do without polarization technology. In this case, in addition to special glasses, you will need a new TV (or a monitor for the computer). It is logical that such 3D will cost you much more. Indeed, large-format equipment with special screens has a rather high cost. However, this technology is far from perfect, as a result of which the image may not seem quite clear or blurred by the edges.
The most expensive and high-quality option for the home are autostereoscopic displays. They do not require additional glasses, as they independently convert the image to a volumetric one. The effect of watching a movie on such devices will be simply overwhelming.