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How Virtual Reality Work?

In: Computers and Technology

Submitted By jaydenz
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How virtual reality work

Virtual reality is a 3-dimensional, computer-generated graphic representation of objects or scenes with the aim of giving the viewer an illusionary sense that such objects or scenes exist in reality. Virtual reality has been designed to address one or more of our senses--visual (sight), auditory (hearing), tactile (feel) and olfactory (smell). As of now, computer and electronic scientists and engineers are working on a system that will include the sense of taste.

For virtual reality to work, there are three imperatives--a computer, special software and the individual user. There are various input devices to greatly enhance the virtual reality experience and make it work--items such as helmets, glasses, joysticks, mice and wands. These input devices are designed to record and measure electronic signals and convert them into a physical world.

In this video, the author-Oliver Kreylos wanted to explain the ways on how our sight respond can generate the change in virtual reality image. This video is divided into four parts, namely: 3D vision, Stereoscopic display, Head tracking and HMD vs CAVE and the author will explain individually how different technique work together with picture.

Part I- 3D Vision

Humans have two eyes located side-by-side in the front of their head, each eye captures its own view and the two separate images are sent on to the brain for processing. When the two images arrive simultaneously in the back of the brain, they are united into one picture. The mind combines the two images by matching up the similarities and adding in the small differences. The small differences between the two images add up to a big difference in the final picture. The combined image is more than the sum of its parts, and it forms 3D object.
3D object
Example:

Right eye
Left eye

Part II- Stereoscopic Display

Stereoscopic

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