vijay multi touch final
TRANSCRIPT
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SEMINAR REPORTS
Bijay Kumar Saha
Regd no:0601227174
Branch-IT
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Contents««
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` A t c scree is a ispla w ic ca etect t e
prese ce a l cati f a t c wit i t e ispla
area.
` O e p i t f c tact at a ti e.
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` Multi-t uch technology is an a vance human-
com puter interaction technique that recogonises
multiple touch points and also includes the har dwaredevices that im plement it, which allow users to
com pute without conventional in put devices .
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` Multi-touch technology dates back to 98 , when theUniversity of or onto develo ped the first finger pressure
multi-touch.
` In 98 ell Labs engineered a multi-touch screen that
could manipulate images with more than one hand.
` In1991 Pierre Wellner pu blished a paper on his multi-
touch ³Digital Desk´, which su pported multi-finger and
pinching motions.
` In 1998, Fingerwor k s, pr oduced a line of multi-touch
pr oducts including the iGesture Pad and the ouchStream
k ey boar d.
Histor y of Multi ouch«
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` Various com panies expanded u pon these discoveries
in the beginning of the twentyfirst centur y.
` Mainstream exposure to multi-touch technology
occurred in the year .
� Recent Development«.
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Micr osoft
Per ceptive
Pixel
A pple
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In 2001 Steve Bathiche and Andy Wilson of Microsoftbegan work on an idea for an interactive table that mixesboth physical and virtual worlds.
In 2007 Microsoft introduced Microsoft Surface.
Intel Core 2 Duo processor, Windows Vista, and 2 GB ofRAM.
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Ipods
Transferring music between
Ipods
Photo Sharing and multimedia
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` PP is a com pany f ounded by New Yor k University consulting resear ch scientist Jefferson Y. Han that
creates wall displays and tables.
` It can accommodate u p to 20 fingers.
intr oduced the FTIR technique to multi touch screens.
` PP¶s echnology is currently being utilized in the
f or m of Multi- ouch CollaborationWall, by
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Products of Apple««
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` Total inter nal reflection is an o ptical phenomenon that occurs when
a ray of light strik es a medium boundar y at an angle lar ger than the
critical angle with respect to the nor mal to the surface.
` The critical angle is the angle of incidence above which totalinter nal reflection occurs.
` The critical angle is given by:
n2= Refractive index of the less den se medium.
n1= Refractive index of the den ser medium.
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Total Internal Reflection
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` REQUIREMENTS
HARDWARE
SOFTWARE
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IR led¶s Acrylic Camera Projector Computer
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Acrylic with led¶s at its edges
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Processing(P5)
Flash C C++ Java
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IR rays obtained on a camera
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(a) IR view of a touch(b)Pixel positions located on screen
Frustrated Total Internal Reflection
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` Low cost factor.
` Su pport high-resolution graphics.
`
Any k ind of applications can be made to suit multi touch using FTI .
` Lar ger shared-display systems.
` It acquires tr ue touch image inf or mation at high spatial and
tem poral resolutions.
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` Personal com puters, Lapto ps ,Tableto ps , Graphics Tablets .
` It su pports both LCD and C T monitors .
` T
elephones ,Watches ,PDAs, Mo bile phones.` Advanced multi touch Gaming with high graphics su pport.
` Gover nmental, office and business purposes.
` An enhanced multimedia experience including audio , video
and photo sharing.
` Enhanced dining experienceA pplications.
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` Touch screens are the interface f or the 1st centur y. Touch
screens address the conflicting demands f or smaller portable
electr onics with lar ger displays, by eliminating traditional
buttons without sacrificing screen size. The recent release of
the iPhone has created a buzz ar ound touch screen interfaces
and its multi-touch acr o batics have caught the eye of many
industr y leaders.
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