Virtual reality creates simulated, 3D environments that users can interact with, unlike real environments. Augmented reality overlays virtual objects on the real world. VR is either immersive, using headsets to replace real vision, non-immersive using large displays, or window-on-world using desktop displays. AR combines real and virtual scenes in real-time. Display technologies for VR and AR include head-mounted displays, glasses, contact lenses, and handheld/spatial projectors. Applications include medical, military, engineering, education, entertainment, and more.

1. Virtual Reality Augmented Reality
Presented By
Er. Tejas Kapile

2. Contents:
What is VR ?
• Types of VR
What is AR ?
AR v/s VR
Display Technologies
Applications

3. What is Virtual Reality?
 Virtual Reality means feeling the imaginary(virtual) world,
rather than real one. The imaginary world is simulation running
in computer.
Virtual reality 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.

4. Types of Virtual Reality
 Immersive Virtual Reality:
• Immersion into virtual reality is a perception of being
physically present in a non-physical world.
• Elements of 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

5.  Non-Immersive Virtual Reality:
• Large display, but doesn't surround the user.
 Window on world Virtual Reality:
• Desktop based virtual reality involves displaying a 3D
virtual on regular desktop display without use of any
specialized movement tracking environment.
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Immersive Virtual Reality Non-Immersive Virtual Reality Window on world Virtual
Reality

6. What is Augmented Reality?
 A combination of real scene viewed by a user and a virtual
scene generated by a computer that augments the scene with
additional information.
An augmented reality adds virtual computer generated objects,
audio and other sense enhancements to a real world environment
real time.
The augmented reality system enhance a person’s performance
and perception of the world.
It can create a system such that a user can’t tell the difference
between the real world and the virtual augmentation of it.

7. Augmented Reality v/s Virtual
Reality
Augmented Reality Virtual Reality
System augments the real world Totally immersive environment.
User maintains a sense of presence in
real world.
Visual senses are under control of
system.
Needs a mechanism to combine
and real worlds.
Needs a mechanism to combine only
virtual world.

8. Display Technologies
 Head Mounted Display (HMD):
• A device paired to a headset such as a harness or helmet.
• These are further classified as:
o Video see-through
o Optical see-through
 Eye Glasses:
• Eye wear that employs camera to intercept the real world
view and re-display it’s augmented view through the eye
pieces.

9.  Contact Lenses:
• Contain the element for display embedded into the lens
including integrated circuitry, LED’s and an antenna for
wireless communication.
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 Virtual Retina Display:
• A personal display device under development.
• A display is scanned directly onto to the retina of a viewer’s
eye.

10. Continue…
 Handheld:
• A small display that fits in a user’s hand.
• Physical constrains of the user having to hold the device.
 Spatial:
• It makes the use of digital projectors to display graphical
information.
• User is not required to carry equipment or wear the display
over the eyes.
• It can be used by multiple people at the same time without
each having to wear a HMD.

11. Applications
Medical Military Engineering Design
Education Entertainment Robotics

12. Any Queries ?