Virtual reality (VR) uses computer technology to simulate a user's physical presence in an imaginary world. The document discusses the definition of VR, its history from early prototypes in the 1950s-60s to current applications, as well as the key technologies involved including hardware like head-mounted displays and software for 3D modeling and simulations. Some examples of VR's use in healthcare, education, entertainment and the military are provided. Both the merits of more engaging learning and the drawbacks of lack of understanding real-world effects are outlined.

1. Virtual Reality
By.
Viral V. Patel

2. TOPICES
• Definition
• Introduction
• History
• Type of virtual reality
• Technology
• Steps to Developing Virtual reality
• Application
• Merit
• Demerit
• Summary

3. Define :
Virtual Reality (VR), sometimes referred to as
”immersive multimedia”, Is a computer
simulated environment that can simulate physical
presence in places in the non-physical world or
imagined world. Virtual reality can recreate sensory
experiences, which include virtual taste, sight,
smell, sound, and touch.

4. Introduction
 What is Virtual Reality(VR) ?
 Virtual Reality refers to a high-end user
interface that involves real-time simulation and
interactions through multiple sensorial channels.
 VR is able to immerse you in a computer-
generated world of your own making a room, a
city, the interior of human body. With VR, you
can explore any uncharted territory of the human
imagination.

5. History of VR
• In mid 1950s visionary cinematographer Morton
H Eilig built a single user console
called Sensorama that included a stereoscopic
display, fans, or emitters, stereo speakers and a
moving chair. This enabled the user watch
television in three dimensional ways.

6. Sensorama
• 3d
• Wide vision
• Motion
• Colour
• Stereo sound
• Aromas
• Wind
• vibration

7. History of VR
• In 1961, Philco Corporation engineers
developed the first HMD known as
the Headsight. The helmet consisted of a video
screen along with a tracking system. Then they
linked to a closed circuit camera system.

8. History of VR
• In 1965, a computer scientist named Ivan
Sutherland envisioned what he called the
“Ultimate Display.” After using this display a
person imagines the virtual world very similar to
the real world.

9. Types of VR
1. Window on World Systems (WoW)
2. Video Mapping
3. Immersive Systems
4. Telepresence
5. Mixed Reality

10. Window on World Systems (WoW)
• Some systems use a conventional computer
monitor to display the visual world.
• called Desktop VR or a Window on a World
(WoW).

11. Video Mapping
• A variation of the WoW approach merges a video
input of the user's silhouette with a 2D computer
graphic.
• The user watches a monitor that shows his
body's interaction with the world.

12. Immersive Systems
• The ultimate VR systems completely immerse
the user's personal viewpoint inside the virtual
world.
• These "immersive" VR systems are often
equipped with a
Head Mounted Display (HMD)

13. Telepresence
• Telepresence is a variation on visualizing
complete computer generated worlds.
• This a technology links remote sensors in the
real world with the senses of a human operator.

14. Mixed Reality
• Merging the Telepresence and Virtual Reality
systems gives the Mixed Reality
• or Seamless Simulation systems.

15. Technology(hardware)
• Virtual Sphere
• Locomotion platform
• A allows users
to be completely immersed into their interactive
virtual experience
• Allowing them to walk through the
virtual environment.

16. Technology(hardware)
• Head mounted display
• 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

17. Technology(hardware)
• Data Gloves
• Outfitted with sensors on the fingers as well as an
overall position/orientation tracking equipment.
• Enables natural interaction with virtual objects by hand
gesture recognition.

18. Technology(hardware)
• (BOOM)Binocular Omni-Orientation
Monitor.
• It is a head-coupled stereoscopic display device.
• Screens & optical system are housed in a box that is
attached to a multi-link arm.
• The user looks into the box, sees the virtual world, and
can guide the box to any position.

19. Technology(hardware)
• The CAVE (Cave Automatic Virtual
Environment)
• 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.

20. Technology(software)
• VR Software exits in many forms and for many
VR applications. These include:
 Three Dimensional Modelling Software
 Two-Dimensional Graphics Software
 Digital Sound Editing Software
 Simulation Software

21. Technology(software)
• Three Dimensional Modelling Software
• Since virtual reality is a three-dimensional medium, all the
objects in a virtual world must be 3D.
• The actual geometry of the objects must be specified using 3D
modelling software, and then imported into the virtual
environment.
• Few examples of 3d software
▫ VRML- virtual reality modelling language
▫ X3D
▫ Java 3D
▫ AC3D
▫ Alice, etc

22. Technology(software)
• Two-Dimensional Graphics Software
• Since there is a limit to the geometric complexity of the
objects in a virtual world, it is often useful to be able to
"paint" the surfaces of the objects with additional detail.
• This process is called texture mapping and requires two-
dimensional graphics software often called "paint
programs".
• A few examples of 2D graphics software:
▫ Adobe Photoshop
▫ Adobe Illustrator
▫ Fractal Design Painter

23. • Digital Sound Editing Software
• Sound is a very important, yet often neglected aspect of
virtual reality.
• A virtual environment is low resolution, looks like
computer graphics, and is not likely to be mistaken for
the real thing.
• Digital sound is nearly as high resolution as human
hearing. Digital editing software allows you to cut, splice,
mix, and loop the sounds of your virtual environment.

24. Technology(software)
• Simulation Software
• Virtual Reality requires sophisticated software in order to provide a
compelling experience.
• Software must be able to process the inputs coming from trackers
and input devices, and then update the displays each second.
• The software creates and maintains an internal database of all the
objects in the virtual world, continually monitors changes to the
database, and distributes this information to all the computers
participating in the virtual world.
• Examples of VR Simulation Software:
Sense-8
Division
Superscape
Cosmo
VRML

25. Ten Steps to Developing Virtual Reality
Applications
Step 0: Plan for the future; Never underestimate
how fast technology will change during
your development process.
Step 1: Understand the strengths and weakness of
educational VR.
Step 2: Identify the intended audience and the end
users probable equipment.
Step 3: Identify an application that is suitable for
VR.

26. Ten Steps to Developing Virtual Reality
Applications
Step 4: Choose an appropriate development
platform (computer hardware & software)
Step 5: Consider carefully the trade-offs of
simulation realism versus performance,
and plan out the simulation carefully.
Step 6: Start with a simple framework, and then
gradually add details.
Step 7: Provide for student evaluation early and
often; Develop the simulation based upon user
feedback.

27. Ten Steps to Developing Virtual Reality
Applications
Step 8: Prepare instructions suitable for students,
faculty, and systems administrators.
Step 9: Incorporate the simulation into the
curriculum.
Step 10:Share your results far and wide.

28. Where is virtual reality used
• MILITARY
Flight simulators.
Ship simulators.
Tank simulators.

29. Where is virtual reality used
• HEALTHCARE
Practice performing surgery.
Perform surgery on a remote patient.
Teach new skills in a safe, controlled environment

30. Where is virtual reality used
• ENTERTAINMENT
More vivid
Move exciting
More attractive

31. Where is virtual reality used
• EDUCATION
Better learning
Better understanding
Fun and education

32. MERIT
• Using 3D and virtual reality environments as
part of your training methodology allows your
students or workforce to experience an entirely
new side of training.
• Theory and practical
• Real-life situations
• Save on cost
• Complex situations made easy
• A safe environment

33. DEMERIT
• Costly
• Problematic to use
• Repair or maintain
• Cause a lack of understanding of the effects of
some actions when performed outside the virtual
environment.

34. ABSTRACT
 Visualization of complicated, large data is helpful
for understanding and analysis.
 VR offers us a new way to interact with
computer.
 VR enables us to experience the virtual world
that is impossible in real world.
 VR is changing our life, eventually VR will
increasingly become a part of our life.

35. THANK YOU