What is three-dimensional space

3 dimensional (3D)

Within reach - three-dimensional vision

3D films give the impression that the action is not taking place on the screen, but directly in the room. The viewer has the feeling, for example, as if film characters or objects are coming straight at them and as if they could reach for them.

In order to achieve this optical effect, 3D technology uses the fact that the two human eyes see different images, which are first put together by the brain to form an image: one eye can only perceive height and width on its own. Since both eyes are a little apart, they perceive what is happening from different perspectives. The brain "calculates" the third, missing dimension from the two images and combines them into an overall picture.

3D glasses filter the images for the respective eye

Even with 3D films, the eyes see different images at the same time. That is why special cameras with two lenses next to each other are used during film production. The cameras record a scene - just as a human would perceive it - from two different perspectives at the same time. If the viewer of a 3D film puts on appropriate 3D glasses, the wrong perspective is filtered out. This can be done, for example, with color filter glasses or with shutter glasses. The 3D technology is also possible on the smartphone, but also only with special glasses.

Not everyone can perceive 3D

However, there are also people who cannot perceive a third dimension at all. This happens if, for example, the brain cannot process the two images correctly and combine them into a three-dimensional image.

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