MANU PRASAD MO

S5 CT

ROLL NO:37

Most advanced form of touch screen

technology

Ability to recognize more than one point of

contact

Allows multiple user interface

Gesture based multi touch

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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• 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

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

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

• 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.

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

THANK YOU

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