HistoryCinematographer MORTONHEILIG who createdsimulator SENSORAMA withvisuals, sound, vibration andsmell.
Technology• Display.• Tracking System.• Devices of Interaction.• Graphic System.
DisplayTable and hand projection used asdisplays in the Augmented Realityusing Shader Lamp Technology
Head Mounted Display • Places physical world and virtual graphics over users view. • Types:- Optical See Through Video See Through• Advantages:- Provides user immersive experience.• Disadvantages:- Inefficiency of devices with 6 DoF
Hand Held •Employs small display that fits user’s hand. •Opts for Video See Through technologyAdvantages:-•Portability and massive availability of cameraphonesDisadvantages:-•Physical constraint to continuously hold the device.•Distorted virtual world compared to real world.
Spatial Display •Digital projectors to project graphical information on physical objects. •Display is separated from user. •Acronymic as SAR (Spatial Augmented Reality)Advantages:-Distinguished real and virtual reality.No limited resolution or distortion of information.Disadvantages:-Inefficient in sunlight.Requirement of surface for projection.
Tracking, Input devices and Computer• Tracking the user’s hand and providing 6DoF interaction technique.• A wand with a button and a smart phone that signals its position and orientation from camera images.• The computer analyzes the sensed visual data to synthesize and position augmentations.
Software and Algorithm• Image registration.• Video tracking from visual odometry.• Steps for Image registration : – Detect interest points. – Detect optical flow.• SLAM (Simultaneous Localization And Mapping)
Applications of ARTask Support:- Enhance viewing of fetus inside a mothers womb and formation of virtual X-ray•Can include images of hidden objects which canbe used in medical applications.• Reduces task complexity in assembly, securityand maintenance