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
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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
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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 forget
I 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
Directional
movements
Turn
forward
or
backward
tilt
left or
right
Roll
up or
down
TYPES OF
VIRTUAL
REALITY
IMMERSIVE
VR
NONIMMERSIVE
VR
Immersive virtual reality
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Head-Mounted Display (HMD)
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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
Non immersive virtual reality is just a
television monitor or computer
Achieving Virtual Reality
Using
hardware
By using software

Rendering:

Programming: VRML v2.0
By using hardware

Binocular Omni-Orientation Monitor (BOOM)
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Head-coupled stereoscopic display device.
Uses CRT to provide high-resolution display.
Convenient to use.
Fast and accurate built-in tracking.
Position tracking:

Cave Automatic Virtual Environment (CAVE)
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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.
By mapping & stitching technologies
Types of VR Systems

Windows on World(WoW)
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
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)
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Telepresence

A variation of visualizing complete computer
generated worlds.
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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)
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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.
visual,
auditory,
haptic,
touch…
Position &
Orientation
Input
Processor
Rendering
Processor
Simulation
Processor
World Database
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
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Virtual Reality in war strategies

Simnet is the first war related virtual
reality application.
Virtual Reality in cockpit
simulation:
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Education & Training
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Driving simulators.
Flight simulators.
Ship simulators.
Tank simulators.
Virtual Reality in medical
applications:
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Practice performing surgery.
Perform surgery on a remote patient.
Teach new skills in a safe, controlled environment.
Virtual reality in designing aspects
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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…