Published on October 11, 2013
1 of 26 DarshanVithani ME CSE Department, Parul Institute Of Engineering and Technology 4 October 2013 Optical Multi-touch Technology
2 of 26Optical Multi-Touch Technology Multi-touch Table
3 of 26Optical Multi-Touch Technology Contents Introduction to Multi–Touch Technology Description of MT Devices Various Sub System H/W & S/W Required Usage of Multi-Touch devices
4 of 26Optical Multi-Touch Technology Introduction Multi-touch technology is an advanced human- computer interaction technique that recogonises multiple touch points and also includes the hardware devices for implement it
5 of 26Optical Multi-Touch Technology Description The multi-touch device is a user interface device that will allow a user to interact with a computer through use of a multi- touch display. it is a substitute to the keyboard and mouse In this user can directly interact with the system with their fingers and not only this but with multiple touches at the same instant.
6 of 26Optical Multi-Touch Technology How Does a Touchscreen Work? A basic touch-screen has three main components: Touch sensor; Controller; Software driver. The touch-screen is an input device, so it needs to be combined with a display and a PC or other device to make a complete touch input system.
7 of 26Optical Multi-Touch Technology Touchscreen Technology Resistive Capacitive Optical
8 of 26Optical Multi-Touch Technology TERMINOLOGY Diffuser: Screen surface for projection. IR Lasers: Laser emitting IR Beam. IR Led: Led emitting IR. Blob - A bright luminescent object Blob tracking - Assigning each blob an ID (identifier). TUIO - A protocol used for communicating the position, size, and relative velocity of blobs. (Tangible User Interface Object) CCV: An open source software for blob tracking. (Community Core Vision) MT: Multitouch
9 of 26Optical Multi-Touch Technology FTIR :Frustrated Total Internal Reflection DI: Diffused Illumination DSI: Diffused Surface Illumination LED LP: Led Laser Plane LLP: Laser Light Plane TECHNIQUES
10 of 26Optical Multi-Touch Technology FTIR :Frustrated Total Internal Reflection
11 of 26Optical Multi-Touch Technology Diffused Illumination
12 of 26Optical Multi-Touch Technology Diffused Surface Illumination
13 of 26Optical Multi-Touch Technology LED LP
14 of 26Optical Multi-Touch Technology IR LASER PLANE
15 of 26Optical Multi-Touch Technology BLOCK DIAGRAM OF TABLE
16 of 26Optical Multi-Touch Technology BLOCK DIAGRAM OF WALL
17 of 26Optical Multi-Touch Technology Implementation on Wall
18 of 26Optical Multi-Touch Technology Camera Sensor & IR Bandpass Filter
19 of 26Optical Multi-Touch Technology Input Subsystem: The Camera We can use a simple web camera that can be easily available in the market. It can be made capable of detecting IR by simply removing the filter from the lens
20 of 26Optical Multi-Touch Technology Output Subsystem: Projector We can use a simple web camera that can be easily available in the market. It can be made capable of detecting IR by simply removing the filter from the lens
21 of 26Optical Multi-Touch Technology Computer Subsystem A personal computer with 20 GB free hard disk space, 1GB RAM and PIV + processor can be efficient enough. The Windows XP/7/8 operating system was chosen because the CCV package is highly supported in Windows. It is also support Mac OS ,linux Debian , Ubuntu & Fedora etc
23 of 26Optical Multi-Touch Technology APPLICATIONS Personal Computing Advertising Graphics Audio Mixing Video Playing Computer Gaming Slide Presentations ……and many more!
24 of 26Optical Multi-Touch Technology CONCLUSION Multi-touch technologies have a long history. Mostly multi Touch devices have limited resolution, are relatively complex, and don't easily and inexpensively scale up to large dimensions. Optical Multi-touch technology use FTIR technique that is simple and easy to implement . It provides any resolution displays supported with high graphics. In this research , it requires a significant amount of space behind the interaction surface. Instead of this we can use Raspberry Pi & its introduction covered by Pranav Pathak.
25 of 26Optical Multi-Touch Technology REFERENCES  Low-Cost Multi-Touch Sensing through FTIR by Jefferson Y. Han  Buxton, W., Hill, R., and Rowley, P. 1985. Issues and Techniques in  Touch-Sensitive Tablet Input  Donald Hearn ,M Pauline Baker, Computer Graphics C version, 2/E  Pearson Education ,2003  Buxton, Bill. 2008. Multi-Touch Systems that I Have Known and Loved.  URL: http://www.billbuxton.com/multitouchOverview.html  How to build a multi touch by Harry Vaan Der  Opensource,MultitouchDisplay,http://www.technologyreview.com/Infotec  OpenCV on the Raspberry Pi , http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37&t=6354
26 of 26 Thank You Darshan Vithani, 4 October 2013
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Optical touch screen technology is ideal for large LCD and plasma displays up to 100" diagonal. ... Multi-Touch Walls. ... Optical. What is Multi-touch? ...
Optical Touch Screen Technology. If you have used an interactive video wall or a tabletop PC, chances are, you have also used a touch screen that was built ...
History of multi-touch. The use of touchscreen technology to control electronic devices pre-dates multi-touch technology and the personal computer.
Optical touchscreen technology uses ... • Delivers a true multi-touch ... Optical touch system in Elo IDS has
Multi Touch Camera Tracking Software EVOVIS: Optical Touch- and Object recognition. Modular, high-performance, unlimited. Flexible Marker- and Tag-System.
In 1972, a group at the University of Illinois filed for a patent on an optical touchscreen ... Multi-touch technology began in 1982, ...
multi-touch. This opened the ... Camera-Based Optical Touch Technology Optical touch systems based on the use of CMOS cameras are typically characterized by a
How does optical touch touchscreen technology fare against the others? ... But I can find very limited information around optical touch.
3 WHITE PAPER What Is Capacitive Touch Technology? Capacitance-Based Sensors A capacitive touchscreen panel (as in Pro-Cap multi touch) consists of an ...