Welcome to the world of

G.V.Ram Mohan Reddy

TABLE OF CONTENTS AN INTRODUCTION TO

VIRTUAL REALITY

WORKING OF VIRTUAL REALITY

TYPES OF VIRTUAL REALITY

ACHIEVING VIRTUAL REALITY

VIRTUAL REALITY SYSTEMS

ARCHITECTURE OF VR SYSTEM

APPLICATIONS

CONCLUSION

AN INTRODUCTION TO VIRTUAL REALITY

The term virtual reality is an oxymoron, which was coined by JARON LANIER founder of V P L RESEARCH.

Virtual Reality is one such technology, which would make a person visualize, listen and feel other senses almost like human beings with the help of computer and a large number of technologies.

Virtual Reality is a way to humans to visualize, manipulate and interact with computers and extremely complex data.

Brief History

In 1950s, flight simulators were built by US Air Force to train student pilots.

In 1965, a research program for computer graphics called “The Ultimate Display” was laid out.

In 1988, commercial development of VR began.

In 1991, first commercial entertainment VR system "Virtuality" was released.

Principle of ‘Learning’:

I hear , I forgetI see , I remember

I experience , I understand

VR makes us immersed in the virtual world, which seems like the real world, making us experience and thereby understand things.

Working of Virtual Reality

View point Angular movements

Turn

tilt

Roll

Directional movements

forward or

backward

left or right

up or down

TYPES OF VIRTUAL REALITY

IMMERSIVE VR

NON-IMMERSIVE

VR

Immersive virtual reality

Non immersive virtual reality is just a television monitor or computer

Head-Mounted Display (HMD) - A Helmet or a face mask providing the visual and auditory

displays.- Use LCD or CRT to display stereo images.- May include built-in head-tracker and stereo headphones

Achieving Virtual Reality

Using

softw

are

Using hardware By mapping

and stitching

technologies

By using software Rendering:

Programming: VRML v2.0

By using hardware

Binocular Omni-Orientation Monitor (BOOM)- Head-coupled stereoscopic display device.- Uses CRT to provide high-resolution display.- Convenient to use.- Fast and accurate built-in tracking.

By mapping & stitching technologies

Position tracking:

Cave Automatic Virtual Environment (CAVE) - Provides the illusion of immersion by projecting stereo images

on the walls and floor of a room-sized cube.- A head tracking system continuously adjust the stereo

projection to the current position of the leading viewer.

Types of VR Systems

Windows on World(WoW) Also called Desktop VR. Using a conventional computer monitor to

display the 3D virtual world.

Immersive VR Completely immerse the user's personal viewpoint inside

the virtual 3D world. The user has no visual contact with the physical word. Often equipped with a Head Mounted Display (HMD).

Types of VR System(Cont’d)

Telepresence A variation of visualizing complete computer

generated worlds. Links remote sensors in the real world with the

senses of a human operator. The remote sensors might be located on a robot. Useful for performing operations in dangerous environments.

Types of VR System(Cont’d) Mixed Reality(Augmented Reality)

The seamless merging of real space and virtual space. Integrate the computer-generated virtual objects into

the physical world which become in a sense an equal part of our natural environment.

Distributed VR A simulated world runs on several computers which are

connected over network and the people are able to interact in real time, sharing the same virtual world.

Architecture of VR System

Input Processor, Simulation Processor, Rendering Processor and World Database.

InputProcessor

RenderingProcessor

World Database

SimulationProcessor

visual, auditory, haptic, touch…

Position &Orientation

Applications

Virtual reality in war strategies Virtual reality in cockpit simulation Virtual reality in Education & Training Virtual reality in medical applications Virtual reality in designing aspect Virtual reality in web development

Virtual Reality in war strategies

Simnet is the first war related virtual reality application.

Virtual Reality in cockpit simulation:

Education & Training Driving simulators. Flight simulators. Ship simulators. Tank simulators.

Virtual Reality in medical applications:

- Practice performing surgery.- Perform surgery on a remote patient.- Teach new skills in a safe, controlled environment.

Virtual reality in designing aspects

Design of conceptual cars Low time consuming & cheaper prototypes

Virtual reality in web development

Massive construction on-line http:/www.bangalorebest.com/virtualcity/

index.asp Many other Virtual City Tours are

available.

Yesterday, Virtual Reality was a science fiction fantasy!!!

Today it is a research topic in laboratories and amusements parks…And, Tomorrow it will certainly replace our televisions, computers!!!

Concluding….

About the only thing that does seem certain about VR is that it will grow and develop.

And as the technology matures, it will become better,

cheaper, and more accessible.

Furthermore, the networks that link computers will expand, making it possible for VR to weave its way

into our daily lives.

Any queries…