Augmented reality (AR) enhances the real world by superimposing computer-generated images over it. There are several types of AR: marker-based AR uses visual markers to link content; location-based AR provides data based on location detected by GPS and compass; outlining AR detects objects in poor visibility and outlines them; projection-based AR projects light onto surfaces for interaction; and superimposition-based AR recognizes objects and replaces or augments the original view. AR has applications in games, maps, object recognition, and education.

1. AUGMENTED
REALITY
BY ANANTHAJITH GIRISH
-completely focus on AR and its types, a revision

2. WHAT IS AUGMENTED REALITY
• Augmented reality is an enhanced version of reality in which the physical real-
world environment is super impose with computer-generated virtual environment
• The process of enhancing the way we see, hear, and feel the environment
around us is called Augmentation.
• The term coined by Tom Caudell in 1990.
• The two basic characteristics are:
Superimposition of the real world and 3D Worlds
Real-time interaction between the user and augmented reality.
AR can be used in games, like Pokémon GO.

3. TYPES OF AUGMENTED REALITY
• Marker-based AR
• Location Based AR
• Outlining AR
• Projection based AR
• Superimposition-based AR

4. • A type of AR in which a camera is used to capture images and a visual marker senses
this and links the image to the content is called image recognisation or marker based
AR.
• The result is produced only when the marker is sensed by the reader.
• The markers are generally distinct but simple patterns can be easily recognised and
read.
• After detection and image recognition of AR-Based Device:
It provides information about that object on the screen.
It replaces that object with something else.
• Eg. It can be used to read QR codes and BARCODE .
MARKER-BASED AR

5. • This type of AR uses a GPS and digital compass embedded in the ar device to
provide data based on one’s location.
• It is most widely used applications of AR and it immensely help travellers in their
journey.
• It reads data from a GPS or digital compass, detects the user’s location and
orientation then displays to the screen.
• Eg. It can be used to locate a place, mapping directions, knowing traffic details,
booking cabs.
LOCATION-BASED AR

6. • In this type of AR, objects are detected in poor visible conditions using special
cameras, the objects are then outlined.
• Object recognition is used here to implement AR.
• Eg. Special cameras installed in cars, outline road boundaries so that cars car
can be reversed easily.
OUTLINING AR

7. • An AR that works on the principal of projecting light on a real surface which is
then sensed for any sort of human interaction.
• Eg. A virtual keyboard on the table or on one’s hand can be projected and then
used by touching its keys.
PROJECT-BASED AR

8. • An AR based on the principal of replacement, it recognizes the object and,
thereafter, partially or completely replaces its original view with an augmented
view of the same object.
• It is very important that the object is accurately identified before being replaced.
• Eg. Pictures of ancient monuments can be superimposed over the real ones
using AR.
SUPERIMPOSITION BASED AR

10. Thank You