VR Virtual Reality
Virtual reality (VR) is a simulated experience that can be similar to or dissimilar to reality. Virtual reality has applications in entertainment (particularly video games), education (such as medical or military training), and business (such as virtual meetings). Augmented reality and mixed reality, also known as extended reality or XR, are two distinct types of VR-style technology.
Currently, standard virtual reality systems generate realistic images, sounds, and other sensations that simulate a user’s physical presence in a virtual environment using either virtual reality headsets or multi-projected environments. A person who uses virtual reality equipment can look around the virtual world, move around in it, and interact with virtual features or items. VR headsets with a head-mounted display and a small screen in front of the eyes are commonly used to create the effect, but it can also be achieved through specially designed rooms with multiple large screens. Virtual reality typically incorporates auditory and video feedback, but haptic technology may also allow for other types of sensory and force feedback.
Simulation-based virtual reality is one method for realizing virtual reality. Driving simulators, for example, give the driver on board the impression that they are driving an actual vehicle by predicting vehicular motion caused by driver input and providing the driver with corresponding visual, motion, and audio cues. People can join the virtual environment in the form of real video as well as an avatar in avatar image-based virtual reality. A conventional avatar or a real video can be used to participate in the 3D distributed virtual environment. Users can customize their participation based on the system’s capabilities.
The modeling of the real environment is critical in projector-based virtual reality applications such as robot navigation, construction modeling, and airplane simulation. Image-based virtual reality systems are gaining popularity in the computer graphics and computer vision communities. It is critical to accurately register acquired 3D data when creating realistic models; typically, a camera is used to model small objects at a short distance. Desktop-based virtual reality entails displaying a 3D virtual world on a regular desktop display without the use of any specialized VR positional tracking equipment. Many modern first-person video games, for example, use various triggers, responsive characters, and other interactive devices to make the user feel as if they are in a virtual world. One common criticism leveled at this type of immersion is the lack of peripheral vision, which limits the user’s ability to know what is going on around them.
A head-mounted display (HMD) immerses the user more fully in a virtual world. A virtual reality headset typically consists of two small high resolution OLED or LCD monitors that provide separate images for each eye for stereoscopic graphics rendering a 3D virtual world, a binaural audio system, positional and rotational real-time head tracking for six degrees of movement, and a binaural audio system. Motion controls with haptic feedback are available for physically interacting within the virtual world in an intuitive manner with little to no abstraction, and an omnidirectional treadmill allows the user to perform locomotive motion in any direction.
The merging of the real and virtual worlds to create new environments and visualizations in which physical and digital objects co-exist and interact in real time is known as mixed reality (MR). A networked virtual reality is one definition of cyberspace. Simulated reality is a hypothetical virtual reality that is as immersive as real life, allowing for a more advanced lifelike experience or even virtual eternity.