In this document i will describes the whole work of the laser virtual keyboard.

1. Presented By:-
Mr. Ajaysingh G. Rajendrakar
Seminar on Virtual Keyboard Technology
Department of Computer Science & Engineering
Shri Sant Gajanan Maharaj College of Engineering, Shegaon,
Dist- Buldhana – 444 203 (Maharashtra)
2017-18

2. Introduction
Virtual keyboard
Modules of Virtual keyboard
System Architecture
Advantages
Drawbacks
Applications
Conclusion
References

3. Introduction
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen
& which uses highly advanced laser technology.
In a virtual keyboard, camera tracks the finger movements of the typist to get
the correct keystroke.
The main features are: platform independent multilingual support for
keyboard text input, built-in language layout and setting, copy/paste etc.

4. Virtual keyboard
 Virtual Keyboard is just another example of today’s computer trend of
"smaller and faster“.
 Virtual Keyboard uses sensor technology and artificial intelligence to let
users work on any surface as if it were a keyboard.
 The keyboard is projected optically on a flat surface and, as the user
touches the image of a key, the optical device detects the stroke and sends
it to the computer.

5. Modules of Virtual Keyboard
The Virtual Keyboard system comprises of three modules:-
 The sensor module
 IR-light source
 The pattern projector

6. Sensor module:
The Sensor Module serves as the eyes of
the Keyboard Perception technology .
The Sensor Module operates by locating
the user's fingers in 3-D space and tracking
the intended keystrokes.
Keystroke information processes and can
then be output to host devices.

7. IR Light source :
 The Infrared Light Source emits a beam of
infrared light .
 This light beam is designed to overlap the
area on which the keyboard pattern projector
or printed image resides.
 This helps in recognizing the hand
movements and the pressing of keys .

8. Pattern projector:
The Pattern Projector or optional printed image presents the image of the
keyboard
This image can be projected on any flat surface.
The projected image is that of a standard QWERTY keyboard, with all the
keys and control functions as in the keyboard.

9. Working layout of a Virtual Keyboard:-

10. Advantages
 Portability
 Accuracy
 Speed of text entry
 Lack of need for flat or large typing surface
 Ability to minimize the risk for repetitive strain injuries.
 No driver software necessary, It can be used as a plug and play device.

11. Drawbacks
 It is very costly.
 The room in which the virtual keyboard is used should not be very bright so
that the keyboard is properly visible.
 Virtual keyboard is hard to get used to. Since it involves typing in thin air, it
requires a little practice. Only people who are good at typing can use a
virtual keyboard efficiently.

12. Applications
 High-tech and industrial Sectors.
 Used with Smart phones, PDAs, email, word processing and spreadsheet
tasks.
 As computer/PDA input.
 Gaming control.

13. Conclusion
 A Virtual keyboard system based on a true-3D optical range camera.
 It is also used in 6th Sense Technology Device in which it is not depends on
surface. The feedback text and/or graphics may be integrated with such
projector, thus enabling truly virtual working area.
 Thus virtual keyboards will make typing easier, faster, and almost a pleasure.

14. References
1] A. Erdem, E. Yardimci, Y. Atalay, V. Cetin, A. E., “Computer vision
based mouse”, IEEE proceedings of International Conference on
Acoustics, Speech, and Signal Processing (ICASS), 2000.
2] Chu-Feng Lien, “Portable Vision-Based HCI – A Real-time Hand
Mouse System on Handheld Devices”, National Taiwan University,
Computer Science and Information Engineering Department.
3] Hojoon Park, “A Method For Controlling The MouseMovement using a
Real Time Camera”, 2008, Brown University,Providence ,RI ,USA,
Department of computer science.