Augmented reality is a type of virtual reality that aims to duplicate the world’s environment in a computer. An augmented reality system generates a composite view for the user that is the combination of the real scene viewed by the user and a virtual scene generated by the computer.
2. What is Augmented Reality?
Augmented reality is a type of virtual
reality that aims to duplicate the
world’s environment in a computer.
An augmented reality system
generates a composite view for the
user that is the combination of the
real scene viewed by the user and a
virtual scene generated by the
computer.
4. Hardware
Hardware components for augmented reality are : processors, display ,
sensors and input devices. Modern mobile computing devices like
smart phones and tablet computers contains these elements which
often include a camera and MEMS sensors such as accelerometer, GPS,
and solid state compass, making them suitable AR platforms.
5. Display
Various technologies are used in Augmented Reality systems
rendering including optical projection systems, monitors, hand
held devices, and display systems worn on one’s person.
Head-mounted
*A head-mounted display (HMD) is a display device paired to a headset such as
a harness or helmet.
*HMDs place image of both physical world and virtual world over the user’s
field of view.
*Modern HMDs often employ sensors for six degrees of freedom monitoring
that allow the system to align virtual information to physical world and adjust
accordingly with user’s head movements.
7. Eyeglasses
AR displays can be rendered on devices resembling eyeglasses.
Versions include eyewear that employ cameras to intercept the
real world view and re-display its augmented view through the
eye pieces.
Contact lenses that display AR imaging are in development.
8. Handheld
• Handheld display employs a small display that fits in
a user's hand.
• The two main advantages of handheld AR is the
portable nature of handheld devices and ubiquitous
nature of camera phones.
Spatial
Spatial Augmented Reality (SAR) augments real
world objects and scenes without the use of special
displays such as monitors, head mounted
displays or hand-held devices. SAR makes use of
digital projectors to display graphical information
onto physical objects.
9. Tracking
Modern mobile augmented reality systems use one or
more of the following tracking technologies: digital
cameras and/or other optical
sensors, accelerometers, GPS, solid state compasses.
10. Software And Algorithm
A key measure of AR systems is how realistically
they integrate augmentations with the real world. The
software must derive real world coordinates,
independent from the camera, from camera
images. Many computer vision methods of
augmented reality are inherited from visual odometry.
Usually those methods consist of two parts.
• First detect interest points, or fiducial markers,
or optical flow in the camera images.
• The second stage restores a real world coordinate
system from the data obtained in the first stage.
11. • Augmented Reality Markup Language (ARML) is a data
standard developed within the Open Geospatial Consortium
(OGC), which consists of an XML grammar to describe the
location and appearance of virtual objects in the scene, as
well as ECMA Script bindings to allow dynamic access to
properties of virtual objects.
• To enable rapid development of Augmented Reality
Application, some software development kits (SDK) have
emerged. A few SDK such as CloudRidAR leverage cloud
computing for performance improvement. Some of the well
known AR SDKs are offered by Metaio, Vuforia, Mobinett
AR, Wikitude, Blippar and Layar.
12. Applications
Augmented reality has many applications. First used
for military, industrial, and medical applications, it
has also been applied to commercial, educational and
entertainment areas.
13. Military
AR can serve as a networked communication system that
renders useful battlefield data onto a soldier's goggles in real
time.
14. Medical
Augmented Reality can provide the surgeon with information,
which are otherwise hidden, such as showing the heartbeat rate,
the blood pressure, the state of the patient’s organ, etc. AR can
be used to let a doctor look inside a patient by combining one
source of images such as an X-ray with another such as video.
15. Education
Augmented reality applications can complement a standard
curriculum. Text, graphics, video and audio can be
superimposed into a student’s real time environment.
16. Gaming And Entertainment
Augmented reality allows gamers to experience digital game play in a real world
environment.
Sports and entertainment venues are provided with see-through and overlay augmentation
through tracked camera feeds for enhanced viewing by the audience.
17. Advantages
• Live Implications
• Improved Interaction
• Personal Experience
• Military, educational, medical and video game applications.
18. Disadvantages
• People are missing out what’s right in front of them
• Lack of privacy
• Expensive to develop and maintain
