2. MANU PRASAD MO
S5 CT
ROLL NO:37

3. Most advanced form of touch screen
technology
Ability to recognize more than one point of
contact
Allows multiple user interface
 Gesture based multi touch

4. A multi-touch display (MTD) senses the
location, relative position, and change in
position of two or more fingertips. Multi-
touch is most commonly enabled in
capacitive touch screen, but may be
available with other types of displays.

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7. • Uses two overhead cameras
• Provide multi touch on pc
• Overcomes the drawback with problem b/w
touch and near touch
• Multi user support has been implemented by
overlaying the image of one user hand on to the
work space of another using degree of
transparency of hand

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10. The MT-50 is an interactive multitouch table developed by
Ideum.
 The table has a 50" display with a 1280 x 720 resolution that
uses IR flood technology to register multi-user, multitouch
gestures, and uses the NUI Snowflake software package to
handle optical processing.
It supports over 50 discrete touch points.
The casing is built with aircraft-grade aluminum and
tempered glass to allow it to stand heavy use in public
environments

11. Mitsubishi Diamond Touch (2001)
Apple iPhone (announced January 9 2007)
Microsoft Pixel Sense (formerly Surface) (May
29, 2007)
NORTD labs Open Source system CUBIT (multi-touch)
(2007)
ELAN eFinger

13. • While working on a group project, it is
suited for mobile computers were for
collaborative use.
• Even with computer display connected
to an external projector and another
mouse, it was impossible for more than
one person to make edits when pulling
together a PowerPoint presentation. Only
one set of actions went through via vocal
instructions to a laptop user, regardless of
the number of ideas tossed out that could
have been explored. This hampered
productivity.
• for an operating system that would
support a minimum of dual input (at least
two mice, two cursors on one screen) for
multiple-user single-tasking, AKA “group
conversations” on a single workstation.

14. you can't see what's under your fingers. For accurate work
in the real domain, a pen or pointing stick is used.
 The finger is not accurate, and obscures what's under it.
You wouldn't write with your finger.
 The screen image and point of touch not being at the
same depth also makes cordinating movements disorienting.
 Fingerprints and wear to both the screen and the fingers.
Fingers are supposed to grip, not slip.
Misregistration of sensor to image. The sensing system is
different to the display system, and they generally don't line
up exactly

15. THANK YOU
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