Presentation on virtual reality

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Presented by:
Sujeet Kumar Mehta
Roll no.: ECE/17/02
Branch: ECE

2. Contents
 What is Virtual Reality?
 History
 Architecture of VR
 Types of Virtual Reality
 Hardware used in Virtual Reality
 Applications of Virtual Reality
 Advantages and Disadvantages
 References
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3. What is Virtual Reality?
 Virtual Reality means feeling the imaginary(virtual) world,
rather than the real one. The imaginary world is a simulation
running in a computer.
 Virtual reality is the term used for computer generated 3D
environments that allow the user to enter and interact with
alternate realities.
 The definition of ‘virtual’is near and ‘reality’is what we
experience as human beings.
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4. History
 More than one person has been involved in the development of
this technological system.
 In 1950’s visionary cinematography Morton Heilig built a single
user console called Sensorama. This enabled the user watch
television in 3 dimensional ways.
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5. Architecture of VR
Architecture of virtual system consists of input processor,
simulation processor, rendering processor and world database.
Input Processor: It controls the devices used to input information to the
computer. The main objective of input processor is to get the coordinate
data to the rest of the system with minimal lag time. The main components
of input processor include keyboard, mouse, 3D position trackers, a voice
recognition system, etc.

6. Simulation Processor: The process of imitating real things virtually is
called simulation. This is the core of the virtual reality system. It takes
the user inputs along with any tasks programmed into the world and
determine the actions that will take place in the virtual world.
Rendering Processor: Simulation processor imitates the real things but
sensation are not produced ,to produce this sensation we use rendering
processor. It creates the sensation that are output to the user. Separate
rendering processes are used for visual, auditory, haptic and other
sensory systems. Each renderer take a description of the world stat from
the simulation process or derive it directly from the world database for
each time step.
World Database: This is also known as World Description Files. It
stores the object that inhabit the world, scripts that describes actions of
those objects.

7. Types of Virtual Reality
▶ Immersive Virtual Reality
▶ Non-Immersive Virtual Reality
▶ Window on world Virtual Reality
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8. Immersive Virtual Reality
Immersion into virtual reality is a
perception of being
physically present in a non-physical world.
Elements of virtual environments that
increase the immersiveness of the
experience:
1.Continuity of surroundings
2.Conformance to human vision
3.Freedom of movement
4.Physical interaction
5.Physical feedback
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9. Non-Immersive Virtual Reality
▶ Large display, but doesn’t surround the user.
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10. Window on world Virtual Reality
▶ Desktop- based Virtual Reality involves displaying a
3-dimensional virtual on regular desktop display without use of
any specialized movement tracking environment.
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11. Hardware Devices
▶ Input Devices
▶ Output Devices
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12. Magic wand
Prio VR
Stem
Razer Hydra Leap Motion
Control VR
Input Devices
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13. Sensing Gloves
3D Audio
Output Devices
Helsinki
Headset
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14. Applications of Virtual Reality
1. Virtual Reality in the Military
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15. 2.Virtual Reality and Education
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16. 3.Virtual Reality in Healthcare
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17. 4.Virtual Reality in Engineering:
Virtual reality engineering includes
the use of 3D modelling tools and
visualization techniques as part of
the design process. This technology
enables engineers to view their
project in 3D and gain a greater
understanding of how it works. Plus,
they can spot any flaws or potential
risks before implementation.
This also allows the design team to
observe their project within a safe
environment and make changes as
and where necessary. This saves
both time and money.

18. 5.Virtual Reality in Entertainment
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19. Advantages and Disadvantages
Advantages
▶ Virtual reality creates a
realistic world.
▶ It enables user to explore
places.
▶ Through Virtual Reality
user can experiment with
an artificial environment.
▶ Virtual Reality make the
education more easily and
comfort.
▶ The equipments used in
virtual reality are very
expensive.
▶ It consists of complex
technology.
▶ In virtual reality
environment we cant
move by our own like in
the real world.
Disadvantages
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20. References
FRANCHI, J. VERTUAL REALITY: AN OVERVIEW. ERIC
DIGEST, JUNE 1995
Larijani, L.C., ed. 1994 The Virtual Reality Primer.
New York: McGraw-Hill, Inc.
Thompson, J., ed. 1993 Virtual Reality: An
International Directory of Research Projects.
Aldershot, U.K.: JBT Publishing.

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