Augmented reality (AR) is a live direct or indirect view of a physical, real-world environment whose elements are "augmented" by computer-generated or extracted real-world sensory input such as sound, video, graphics, haptics or GPS data.[1] It is related to a more general concept called computer-mediated reality, in which a view of reality is modified (possibly even diminished rather than augmented) by a computer. Augmented reality enhances one’s current perception of reality, whereas in contrast, virtual reality replaces the real world with a simulated one.

1. Augmented
Reality

2. What is Augmented Reality (AR)?
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Augmented reality (AR) is a live direct or indirect
view of a physical, real-world environment whose
elements are "augmented“(made greater in size or
value) by computer-generated or real-world sensory
input such as sound, video, graphics, haptics etc.

3. Informations
▰ It is related to a more general concept called computer-
mediated reality, in which a view of reality is modified by a
computer.
▰ Augmented reality enhances one’s current perception of
reality, whereas virtual reality replaces the real world with a
simulated one.
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▰ With the help of advanced AR technology (e.g. adding computer
vision and object recognition) the information about the
surrounding real world of the user becomes interactive.
▰ Information about the environment and its objects is overlaid on
the real world.

4. Augmented Reality
▰ System augments the real world
scene
▰ User maintains a sense of presence
in real world
▰ Needs a mechanism to combine
virtual and real worlds
▰ Hard to register real and virtual
Augmented Reality vs. Virtual Reality
Virtual Reality
▰ Totally immersive environment
▰ Senses are under control of system
▰ Need a mechanism to feed virtual
world to user
▰ Hard to make VR world interesting
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5. Combining the Real
and
Virtual Worlds
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6. Interior Designing 6
Requirements:
• Precise models
• Locations and optical properties of
the viewer (or camera) and the display
• Calibration of all devices
• To combine all local coordinate
systems centered on the devices and
the objects in the scene in a global
coordinate system

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• Register models of all 3D objects of interest with their counterparts in the scene
• Track the objects over time when the user moves and interacts with the scene

8. Realistic Merging
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physically
reasonable
Collision
detection Shadows
Requires:

9. Required Technologies for AR:
Hardware components for augmented reality are:
processor, display, sensors and input devices.
Modern mobile computing devices like smartphones
and tablet computers contain these elements which
often include a camera and sensors such as
accelerometer, GPS, and solid state compass,
making them suitable AR platforms.
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10. Display
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Various technologies are used in Augmented Reality
rendering including optical projection systems,
monitors, hand held devices,
Monitor Based:
Laptops
Cell phones
Projectors
Head Mounted Displays:

11. Performance Issues:
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• Two performance criteria are placed on the
system:
• Update rate for generating the augmenting image
• Accuracy of the registration of the real and virtual
image
• Update rate can limit registration accuracy as well
• “1 ms = 1mm error”

12. Failures in Registration:
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• Noise: Position and pose of camera with respect to the real scene
• Image distortions
• Time delays: In calculating the camera position

13. Application and AR and its use:
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PROJECT TANGO – MAKING SMARTPHONES SEE:
• Announced early in 2014 and developed by Google’s
Advanced Technology and Projects (ATAP) team, Project
Tango is Google’s attempt to get mobile phones and
tablets to see the way we see.
• The essential aim is to get your smartphone to understand
the world around it, enabling it to provide augmented
reality experiences.
• Intel and Qualcomm have announced reference Project
Tango devices for developers to work on.
• And the latest Iphone X shows off their new use of AR
in apps.

14. Google Glass:
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• Google Glass is an optical head-mounted display
designed in the shape of a pair of eyeglasses
• Google Glass displayed information in a
smartphone-like hands-free format.
• Wearers communicated with the Internet via
natural language voice commands

15. Features Of Google Glass
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CameraTouchpad LCoS
A touchpad is located on the side
of Google Glass, allowing
users to control the device by
swiping through a timeline-like
interface It has the ability to take photos and video
The Explorer version of Google Glass uses
a liquid crystal on silicon (LCoS), LED
illuminated display

16. Architectural Anatomy:
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Used for mapping and designing architectural
structures like rooms , apartments, offices etc.

17. In Medical:
▰Laser-scanning :
▰ Scanning affected parts of the body
like brain.
▰LCD screen above patient for displaying
the AR projection of the scanned part.
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