augmented reality
DESCRIPTION
A presentation on Augmented Reality, The basic principles involved and various types of Augmented Reality. Presented on Govt. College of Technology, Coimbatore.TRANSCRIPT
Augmented reality
Dept. of Electronics and Instrumentation EngineeringGovt. College of Technology, Coimbatore
Augmented Reality is Basically Terminator Vision
Real scene +
computer generated data (or) graphics
=Augmented Reality
On the other hand Virtual reality provides full immersion. It does not “augment” reality.
Augmented reality on TV
Types of augmented reality
1.Marker-based Augmented reality
2.Markerless Augmented Reality.
3.Position based Augmented Reality
Things needed to create Augmented reality:
1. Smartphone 2. Augmented Reality app
Marker based Augmented Reality
• Requires a special Marker• Used in Advertising
1.Input 2. Marker Detection
Steps involved in marker based augmented reality
Using algorithms like Four corner test,Size test
Through Video
3. Marker Identification and Rendering
Steps involved in marker based augmented reality
• The detected marker is identified by matching it with other markers in a database.• Using Transformation Matrix 3D objects are aligned perfectly on the marker
Marker less Augmented Reality
Steps involved in marker less augmented reality
1.Feature point detection 2.Plane extraction
SLAM – Simultaneous Localization and Mapping
Harris Corner Detector
3.Tracking and Rendering• the distance and orientation of the
extracted plane with respect to the camera is calculated using various algorithms.(Eg: SIFT). This is called Tracking.
• The 3D object is rendered on the plane using rendering software.
Marker less AR can be used for Interactive learning
Position based augmented reality
Provides real time information
Steps Involved:
• Position of the user is found using GPS• Information about position is gathered from the internet• Gathered information is rendered on the screen using suitable rendering software
Most popular augmented reality apps
Nokia City Lens