Virtual Reality
The Technology today can be changed, the way one look at the world now. With the change in technology the way people look the world also changed.
We are talking about Virtual Reality (VR), which changes the entire world in one short. It is necessary that everyone must know about virtual reality. With so much discussion, here in this article you need to know that actually what virtual reality is. We thought it would be good to take a look the key points of virtual reality.
Virtual Reality
Virtual Reality (VR) replaces the real world with the artificial. There are artificial scenes in virtual reality or the places are real, but photographed so that it can be included in Virtual Reality app. The users in Virtual Reality enter an entirely immersive world and cut off from real world. In Virtual Reality everything around the user is fabricated by the system.
Virtual Reality is the term used to describe a three-dimensional, computer generated environment which can be explored and interacted by person. That person becomes part of this environment and whilst there, is able tom manipulate objects or perform a series of action.
Virtual Reality is a primarily experienced through two of the five senses: sight and sound. This may displays inside a blank room, headset, or other device that allows the user to fed present to feel present in the virtual environment.
Virtual Reality might work better for video games and social networking in a virtual environment, such as play station. Here, in Virtual Reality the HEAD Mounted Display (HMD) and input device block out the entire external world from the viewers and present a view that is under the complete control of the computer. In Virtual Reality (VR) 75% is virtual and 25% is real. In Virtual Reality you can move here and there, up, down, in front or behind, with virtual reality, as if the things are in front of you. Virtual reality may be viewed through a special Virtual Reality (VR) viewer it is known as Oculus Rift.
Through virtual reality apps you can discover about the places that you have never been, like Mount Everest, Planets, or areas under the sea. Virtual world like Second Life or Smallworlds are virtual reality environments. In VR the technology is just stepping up to the plate; some popular products like Magic Leap, Oculus Rift. For education, medical, and military the virtual reality are used.
Why Virtual Reality is needed?
⦁ Education and Training: The most common example is the flight simulator. This type of simulator has shown the benefits of simulation environment for training. They have lower operating costs and safer to use than real aircraft. They additionally permit the simulation of dangerous situations not allowable with real aircraft.
⦁ Operations in dangerous environment: There are still many examples of people working in dangerous or hardship environment that could benefits from the use of VR-mediated teleportation. Workers in radioactive, space, or toxic environments could be relocated to the safety of a VR environment where they could ‘handle’ any hazardous using tele-operation or tele-presence.
⦁ Scientific Visualization: This provides the researcher with immediate graphical feedback during the course of the computations and gives him/her he ability to ‘steer’ the solution process. It helps planetary geologists to remotely analyze the surface of a planet. They use Virtual Reality techniques to roam planetary terrains.
⦁ Medicine: Until now experimental research and education in medicine was mainly based on dissection and study of plastic models. Computerization 3D human models provide a new approach to research and education in medicine. Experimenting medicine research with virtual patients will be a reality. We will be ready to produce not only realistic looking virtual patients, however additionally histological and bone structures. With the simulation of the whole physiology of the human.
Types of VR System
VR system can be classified into 3 major categories base on one of the important features of VR, which is immersion and the type of interfaces or components utilized in the system. These are:
⦁ Non-Immersive VR System
⦁ Immersive VR System
⦁ Semi-Immersive VR System
Non-Immersive VR System: It is also called Desktop VR system, Fish tank or window on world system. Least immersive and least expensive of the Virtual Reality systems, it requires the least sophisticated component. It allows users to interact with a 3D environment through a stereo display monitors and glasses. This has large display, but doesn’t surround the user.
Immersive VR System: Most expensive and give the highest level of immersion. Its components include HMD, tracking devices, data gloves and others, which encompass the user with computer generated 3D animation that gives the user the feeling of being part of the virtual environment. Elements of virtual environment that increases the immersive of the experience:
⦁ Continuity of surrounding
⦁ Conformance to human vision
⦁ Freedom of movement
⦁ Physical interaction
⦁ Physical feedback
Semi-Immersive VR System: This provides high level of immersion, while keeping the simplicity of the desktop VR or utilization some physical model. Example of such system includes the Cave Automatic Virtual Environment and an application is the driving simulator.
Applications of Virtual Reality
⦁ Industrial & Manufacturing: Guided training and remote support, improved safety and real-time factor diagnostics.
⦁ Healthcare: More efficient patient care, diagnosis and treatment assistance, surgical Training and visualization.
⦁ Engineering: 3D visualization and CAD, colleague collaboration and communication.
⦁ Retail: Navigation to products and personalized coupons. Try before you buy clothes, furniture, car, real estate, shopping, etc. Education: Immersive, self-guided, interactive visual learning, any subject from history and physics to vocational.
⦁ Marketing & Advertising: Personalized ads based on context, consumer data – what they like, what they look at, etc.
⦁ Military: Instructional training, in the field assistance.
⦁ Emergency response: Police, fire, security response, potential improvements in safety, response time and saving lives.
⦁ Entertainment: Used for virtual museums, theatres, virtual theme parks, gaming, etc.
Key Components of Virtual Reality
Display Screen
⦁ PC/Console/Smart phones: Computers are used to process inputs and outputs sequentially. To power the content creation and production significant computing power is required, thereby making PC/Console/Smart phones important part of VR System.
⦁ Head Mount Display (HMD): HMD is a display device, worn on the head or as part of a helmet or monocular HMD(head-mounted display) or binocular HMD. A HMD has many uses, including in gaming, aviation, engineering and medicine lift. A typical HMD(head-mounted display) has one or two small display, with lenses and semi-transparent mirrors embedded in eyeglasses and have their own glasses.
VR Engine:
Responsible for hard and generating graphical models object rendering, lighting, mapping, texturing, simulation and show in period. Handles the interaction with users and is an interface with the I/O devices.
Sensors
⦁ Magnetometer: It measures magnetic fields. It basically acts as a compass, and by having the ability to observe compass north, it will continuously tell that direction it's facing.
⦁ Accelerometer: Used to let your device know which wait is facing, measures acceleration across an axis or multiple axis and detect position, velocity, vibration and to determine orientation.
⦁ Gyroscopes: Used for measuring and maintaining orientation and angular velocity. A gyro senses changes in twist and angle.
Lenses
Lenses in our eyes is to alter the incoming light in a way that it gets focused on our receptors on the back of our eyes..If you look at something really close your lenses have to bend a lot to give you a sharp picture. In virtual reality, HMD are 3 to 7cmin front of our eye. That’s why we need lenses in VR HMDs that bend the light and make it easier for our eyes to see
Future of Virtual Reality:
Virtual reality is a growing industry where PC and specialized hardware are getting better, faster and cheaper because of development in Virtual Reality. In future, maybe 3D user interfaces will replace the windows based ones or will have huge demand for Virtual Reality programmers in near future also may revolution in gaming industries.
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