Optical Multi Touch Technology

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Type Of Touch screen technology this is provided by TCSS | Take Care Solutions & Services Pvt. Ltd. www.tcss.co.in & www.darshanvithani.com

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Optical Multi Touch Technology

  1. 1. 1 of 26 DarshanVithani ME CSE Department, Parul Institute Of Engineering and Technology 4 October 2013 Optical Multi-touch Technology
  2. 2. 2 of 26Optical Multi-Touch Technology Multi-touch Table
  3. 3. 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. 4. 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. 5. 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. 6. 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. 7. 7 of 26Optical Multi-Touch Technology Touchscreen Technology Resistive Capacitive Optical
  8. 8. 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. 9. 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. 10. 10 of 26Optical Multi-Touch Technology FTIR :Frustrated Total Internal Reflection
  11. 11. 11 of 26Optical Multi-Touch Technology Diffused Illumination
  12. 12. 12 of 26Optical Multi-Touch Technology Diffused Surface Illumination
  13. 13. 13 of 26Optical Multi-Touch Technology LED LP
  14. 14. 14 of 26Optical Multi-Touch Technology IR LASER PLANE
  15. 15. 15 of 26Optical Multi-Touch Technology BLOCK DIAGRAM OF TABLE
  16. 16. 16 of 26Optical Multi-Touch Technology BLOCK DIAGRAM OF WALL
  17. 17. 17 of 26Optical Multi-Touch Technology Implementation on Wall
  18. 18. 18 of 26Optical Multi-Touch Technology Camera Sensor & IR Bandpass Filter
  19. 19. 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. 20. 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. 21. 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
  22. 22. 22 of 26Optical Multi-Touch Technology Application Development  Adobe Flash / Flex / Air  Browser & Web (HTML/CSS/Javascript)  C/C++ (CCV/OpenCV/OpenGL/OpenFrameworks)  Java (Android/Processing.org)  C# (.NET/Silverlight/WPF)  Objective-C (Cocoa/iPhone)
  23. 23. 23 of 26Optical Multi-Touch Technology APPLICATIONS  Personal Computing  Advertising  Graphics  Audio Mixing  Video Playing  Computer Gaming  Slide Presentations ……and many more!
  24. 24. 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. 25. 25 of 26Optical Multi-Touch Technology REFERENCES [1] Low-Cost Multi-Touch Sensing through FTIR by Jefferson Y. Han [2] Buxton, W., Hill, R., and Rowley, P. 1985. Issues and Techniques in [3] Touch-Sensitive Tablet Input [4] Donald Hearn ,M Pauline Baker, Computer Graphics C version, 2/E [5] Pearson Education ,2003 [6] Buxton, Bill. 2008. Multi-Touch Systems that I Have Known and Loved. [7] URL: http://www.billbuxton.com/multitouchOverview.html [8] How to build a multi touch by Harry Vaan Der [9] Opensource,MultitouchDisplay,http://www.technologyreview.com/Infotec [10] OpenCV on the Raspberry Pi , http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37&t=6354
  26. 26. 26 of 26 Thank You Darshan Vithani, 4 October 2013

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