Virtual reality (VR) allows users to experience simulated, three-dimensional environments through specialized hardware like headsets and motion tracking devices. The document defines VR and discusses its history, types including immersive, non-immersive and collaborative VR, applications in fields like military, healthcare, education and scientific visualization. Advantages include creating realistic worlds and enabling exploration, while disadvantages are the expense of equipment and inability to physically move in VR environments like the real world.

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2. Contents
 Introduction
 What is Virtual Reality?
 Abstract
 History
 Types of Virtual Reality
 Types of VR Experiences
 Applications of Virtual Reality
 Advantages and Disadvantages
 Conclusion
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3. Virtual reality (VR) means experiencing things
through our computers that don't really exist.
Virtual reality places the user inside a
three-dimensional experience. Instead of
viewing a screen in front of them, users
are immersed in and interact with 3D
worlds.
Introduction

4. 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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5. Abstract
Virtual Reality (VR) is a computer-generated simulation
of an immersive, three-dimensional environment that can
be interacted with and explored by users. It typically
involves the use of specialized hardware, such as
headsets and motion-tracking devices, to create a sense
of presence and immersion within the virtual world. Users
can experience VR through visual, auditory, and
sometimes even haptic feedback, allowing them to feel
like they are physically present in a digitally constructed
environment.

6. 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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7. Types of Virtual Reality
Immersive Virtual Reality
Non-Immersive Virtual Reality
Collaborative 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.
It’ll give you a sense of being present in that virtual
world, and everything is happening to you for real
Elements of virtual environments that increase the
immersiveness of the experience:
1. Continuity of surroundings
2. Degree of Freedom
3. Physical interaction
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9. Non-Immersive Virtual Reality
Non-immersive virtual reality refers to a virtual
experience through a computer where you can
control some characters or activities within the
software, but the environment is not directly
interacting with you
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10. Collaborative Virtual Reality
This is a form of a virtual world where different people from various
locations can come into contact within a virtual environment, usually in
the form of 3D or projected characters.
For example, there is a video game called PUBG
(Players Unknown Battle-Ground),
where tons of players come into
existence as individual virtual
characters which they can
control.
Here they can interact with each
other through microphones,
headsets, and chatting.
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11. Types of Virtual Reality Experiences
• Degree of Freedom
1) 3 DoF VR
2) 6 DoF VR
• Tracking
1) Inside-out
2) Outside-In
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12. Degree of Freedom
 3DoF
3-DoF headsets allow us to track rotational motion but
not translational. With a user wearing a VR headset, we
can
therefore track whether a user:
•Looks left or right
•Rotates their head up or down
•Pivots left or right
 6DoF
6-DoF headsets allow us to track
translational motion as well as rotational motion. We
can determine whether a user
has rotated their head and moved:
•Forward or backward
•Laterally or vertically
•Up or down

13. Tracking
 Outside-In
• VR device uses external sensors to detect
motion and track positioning of the headset
and controllers
• Uses infrared LEDS
 Inside-Out
• Cameras and other sensors are placed on the device itself
• Advanced computer vision techniques
are used to determine the exact
position and movement of headset
and controllers

14. Applications of Virtual Reality
Virtual Reality in the Military:
The history of VR has often
been influenced by the
defense industry. One of the
first VR projects was
developed in the 1960s for a
US military combat system.
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15. Virtual Reality in Healthcare
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16. 3.Virtual Reality and Education
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17. 4.Virtual Reality and Scientific Visualization
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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. VR technology has found applications in various
fields, including gaming, entertainment,
education, healthcare, architecture, and training.
It offers unique opportunities for experiences that
would otherwise be impossible or too dangerous
to replicate in the real world.
Conclusion

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