An Article Written by Trainee Abdullah AlEyoni From King Saud University about Virtual Reality.
One: What is virtual reality (VR)?
Virtual reality (VR) is an interactive computer-generated experience taking place within a simulated environment. It incorporates mainly auditory and visual feedback but may also allow other types of sensory feedback. This immersive environment can be similar to the real world or it can be fantastical.
Two: Does virtual reality (VR) similar augmented reality (AR)?
No, because Augmented reality (AR) is an interactive experience of a real-world environment where the objects that reside in the real-world are "augmented" by computer-generated perceptual information, sometimes across multiple sensory modalities, including visual, auditory, haptic, somatosensory, and olfactory.
Three: Virtual Reality Technology:
1) Head-Mounted-Display (HMD)
HMD was the first device providing its wearer with an immersive experience. A typical HMD houses two miniature display screens and an optical system that channels the images from the screens to the eyes, thereby, presenting a stereo view of a virtual world.
Figure 1 Head-Mounted-Display (HMD)
2) Binocular Omni-Orientation Monitor (BOOM)
The BOOM from Fakes pace is a head-coupled stereoscopic display device. Screens and optical system are housed in a box that is attached to a multi-link arm. The user looks into the box through two holes, sees the virtual world, and can guide the box to any position within the operational volume of the device.
Figure 2 Binocular Omni-Orientation Monitor (BOOM)
3) Cave Automatic Virtual Environment (CAVE)
The CAVE uses the illusion of immersion by projecting stereo images on the walls and floor of a room-sized cube Several persons wearing lightweight stereo glasses can enter and walk freely inside the CAVE. A head tracking system continuously adjusts the stereo projection to the current position of the leading viewer.
Figure 3 Cave Automatic Virtual Environment
4) Input Devices and other Sensual Technologies
A variety of input devices like data gloves, joysticks, and hand-held wands allow the user to navigate through a virtual environment and to interact with virtual objects.