MULTI-TOUCH:
Enhanced dining experience at restaurant
Concierge service at hotels
Concept mapping
Use as interactive Whiteboards
Better multi-media experience
One of the greatest examples of it is the Microsoft Surface.
Microsoft Surface:
1) Screen
2) Infrared Cameras
3) CPU
This is a Modern Menu Card used in a 12-Star hotel.
HOW DOES IT WORK?
Utilizes Frustrated Total Internal Reflection
The surface of the table is a thin diffuser, which has
infrared light and a projector reflected on its underside.
Infrared cameras pick up on any objects such as fingers,
paintbrushes over the surface, when touching the display.
Frustrated Total
Internal Reflection
Light encounters an interface (boundary) with lower index of
refraction, light becomes refracted (bent).
Refraction depends on the angle of incidence
After a certain angle it undergoes TIR
A finger, with a lower index of refraction, when it comes in
contact with that surface can cause the light to escape
Image Processing
Infrared camera captures image on the screen
The image processing subtracts background image to reduce
noise
It uses a Gaussian smoothing filter to reduce noise
Introduced a cutoff filter to make the image black and white
Grouped the white pixels together
Then the program finds the center and relative size of the
pixel groups to drive the applications.
MULTI-TOUCH
COLLABORATION WALL:
Army marking a particular area
And, a person reporting the crime rate of a state, Georgia
Now all that were some still pictures you saw now view them in the form of video's.
1. Microsoft Surface in practice.
2. Multi-touch Wall used at CNN.
3. Multi-touch Wall.
