27-07-2012, 04:28 PM
virtual keyboard
virtual keyboard.docx (Size: 840.29 KB / Downloads: 54)
ABSTRACT
The devices that virtual are nothing but light. Which means there is no breakage, no cleaning, no wiring, no room to take up and no infection transfer. It is keyless, button-less, and switch-less. The keyboard's size and layout can be reconfigured in software allowing for numerous keypad configurations with the same hardware. Mouse or trackball capability can be built in without additional hardware.
As the demand for computing environments evolves, new human-computer interfaces have been implemented to provide multiform interactions between users and machines. Nonetheless, the basis for most human-to-computer interactions remains the binomial keyboard/mouse. Ordinary keyboards however, to be comfortable and effective, must be reasonably sized. Thus they are cumbersome to carry and often require wiring. To overcome these problems, a smaller and more mobile touch-typing device [1] has been proposed which does not have physical support. This device is known as virtual keyboard or zero-form-factor interface.
In this paper, a complete system is presented which mimics a QWERTY keyboard on an arbitrary surface. The system consists of a pattern projector and a true-3D range camera for detecting the typing events. We exploit depth information acquired with the 3D range camera and detect the hand region using a pre-computed reference frame. The fingertips are found by analyzing the hands’ contour and fitting the depth curve with different feature models. To detect a keystroke, we analyze the feature of the depth curve and map it back to a global coordinate system to find which key was pressed. These steps are fully automated and do not require human intervention. The system can be used in any application requiring zero form factor and minimized or no contact with a medium, as in a large number of cases in human-to-computer interaction, virtual reality, game control, 3D designs, etc.
A virtual keyboard system based on true-3D optical range camera is presented. Keystroke events are accurately tracked independently on the user. No training is required by the system that automatically adapts itself to the background conditions when turn on.
No specific hardware must be worn and in principle no dedicated goggles are necessary to view the keyboard since it is projected onto an arbitrary surface by optical means .The feedback text and graphics may be integrated with such projector, thus enabling truly virtual working area. Experiments have shown the suitability of the approach which achieves high accuracy and speed. The development of man-machine interfaces to control devices with the eyes could be of great impact in handicapped individuals. In this paper a non-obstructive interface is proposed to detect and track iris position based on digital image processing techniques, templates and a reference point mounted near the eye. The position of the iris is detected in four steps: reference detection, iris center detection, iris position computation relative to the reference and determination of the eye position within the virtual keyboard. The position of the iris is projected over a virtual keyboard and it is determined the maximum number of keys that the system is able to discriminate.
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades – its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical – detectable surface or area rather than by depressing physical keys.
INTRODUCTION
Computers have undergone rapid miniaturization from being a 'space saver' to 'as tiny as your palm'. Disks and components grew smaller in size, but one component still remained the same for decades - it's the keyboard. Miniaturization of keyboard had proved nightmare for users. Users of PDAs and smart phones are annoyed by the tiny size of the keys. The new innovation Virtual Keyboard uses advanced technologies to project a full-sized computing key-board to any surface. This device has become the solution for mobile computer users who prefer to do touch-typing than cramping over tiny keys. Typing information into mobile devices usually feels about as natural as a linebacker riding a Big Wheel. Virtual Keyboard is a way to eliminate finger cramping. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed.
The Virtual Laser Keyboard (VKB) leverages the power of laser and infrared technology and projects a full-size keyboard onto any flat surface. As you type on the laser projection, detection technology based on optical recognition enables the user to tap the images of the keys, complete with realistic tapping sounds, which feed into the compatible Bluetooth enabled PDA, Smart phone, laptop or PC. Unlike many small snap-on keyboards for PDAs.
HISTORY OF VIRTUAL LASER KEYBOARD
We are witnesses of new technology improvements that are surprising us every day when we hear about them or even look at them. The computers and computer’s technology revolutionize the world and the way of life. Since the beginning in the 50’s, every new achievement in this section was accepted by the vast masses of people which were expecting new improvements with huge hope for making business and life easier and more successful. In this century, the computers rule the world. Beginning from the first computer ENIAC, which proportions were huge, the technology came up with microchips, tiny devices which are hundred times smaller then the basic of the structure of ENIAC, the electronic tube. The technology of creating microchips, allows us to create smaller devices like CPU’s, Integrated Circuits, Microcontrollers, and so on…
From other side, the classic science in the same time was making very important researches and discoveries, especially physics. The physicist discovered laser rays and sensors of the same rays, which are getting more sophisticated and more powerful.
If we put these two parts of science in one, we will have more than hundred products which are making our life easier, more successful and more secured. Products like this are IR, Bluetooth transmitters and receivers, optical mouse, LCD Projectors, Large Video Beams and the latest gadget of the technology called Virtual Laser Keyboard. This non-physical keyboard is implementing optics from physics and microcontrollers form electronics and programming. The main difference is that the Virtual Laser Keyboard physically is not present. An optical virtual keyboard has been invented by IBM engineers in 1992.
WHAT IS A VIRTUAL LASER KEYBOARD
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades -its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical -dectable surface or area rather than by depressing physical keys.
Unlike many small snap-on keyboards for PDAs, the Virtual Laser Keyboard provides a full-size QWERTY keyboard. It is also smaller and more convenient to use than the folding-type keyboards made by some manufacturers and similar to them in functionality. There are no mechanical moving parts whatsoever in the Virtual Laser Keyboard. It provides a projected image that is the perfect portable input device for PDAs. It's similar in responsiveness to regular keyboards.
virtual keyboard.docx (Size: 840.29 KB / Downloads: 54)
ABSTRACT
The devices that virtual are nothing but light. Which means there is no breakage, no cleaning, no wiring, no room to take up and no infection transfer. It is keyless, button-less, and switch-less. The keyboard's size and layout can be reconfigured in software allowing for numerous keypad configurations with the same hardware. Mouse or trackball capability can be built in without additional hardware.
As the demand for computing environments evolves, new human-computer interfaces have been implemented to provide multiform interactions between users and machines. Nonetheless, the basis for most human-to-computer interactions remains the binomial keyboard/mouse. Ordinary keyboards however, to be comfortable and effective, must be reasonably sized. Thus they are cumbersome to carry and often require wiring. To overcome these problems, a smaller and more mobile touch-typing device [1] has been proposed which does not have physical support. This device is known as virtual keyboard or zero-form-factor interface.
In this paper, a complete system is presented which mimics a QWERTY keyboard on an arbitrary surface. The system consists of a pattern projector and a true-3D range camera for detecting the typing events. We exploit depth information acquired with the 3D range camera and detect the hand region using a pre-computed reference frame. The fingertips are found by analyzing the hands’ contour and fitting the depth curve with different feature models. To detect a keystroke, we analyze the feature of the depth curve and map it back to a global coordinate system to find which key was pressed. These steps are fully automated and do not require human intervention. The system can be used in any application requiring zero form factor and minimized or no contact with a medium, as in a large number of cases in human-to-computer interaction, virtual reality, game control, 3D designs, etc.
A virtual keyboard system based on true-3D optical range camera is presented. Keystroke events are accurately tracked independently on the user. No training is required by the system that automatically adapts itself to the background conditions when turn on.
No specific hardware must be worn and in principle no dedicated goggles are necessary to view the keyboard since it is projected onto an arbitrary surface by optical means .The feedback text and graphics may be integrated with such projector, thus enabling truly virtual working area. Experiments have shown the suitability of the approach which achieves high accuracy and speed. The development of man-machine interfaces to control devices with the eyes could be of great impact in handicapped individuals. In this paper a non-obstructive interface is proposed to detect and track iris position based on digital image processing techniques, templates and a reference point mounted near the eye. The position of the iris is detected in four steps: reference detection, iris center detection, iris position computation relative to the reference and determination of the eye position within the virtual keyboard. The position of the iris is projected over a virtual keyboard and it is determined the maximum number of keys that the system is able to discriminate.
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades – its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical – detectable surface or area rather than by depressing physical keys.
INTRODUCTION
Computers have undergone rapid miniaturization from being a 'space saver' to 'as tiny as your palm'. Disks and components grew smaller in size, but one component still remained the same for decades - it's the keyboard. Miniaturization of keyboard had proved nightmare for users. Users of PDAs and smart phones are annoyed by the tiny size of the keys. The new innovation Virtual Keyboard uses advanced technologies to project a full-sized computing key-board to any surface. This device has become the solution for mobile computer users who prefer to do touch-typing than cramping over tiny keys. Typing information into mobile devices usually feels about as natural as a linebacker riding a Big Wheel. Virtual Keyboard is a way to eliminate finger cramping. All that's needed to use the keyboard is a flat surface. Using laser technology, a bright red image of a keyboard is projected from a device such as a handheld. Detection technology based on optical recognition allows users to tap the images of the keys so the virtual keyboard behaves like a real one. It's designed to support any typing speed.
The Virtual Laser Keyboard (VKB) leverages the power of laser and infrared technology and projects a full-size keyboard onto any flat surface. As you type on the laser projection, detection technology based on optical recognition enables the user to tap the images of the keys, complete with realistic tapping sounds, which feed into the compatible Bluetooth enabled PDA, Smart phone, laptop or PC. Unlike many small snap-on keyboards for PDAs.
HISTORY OF VIRTUAL LASER KEYBOARD
We are witnesses of new technology improvements that are surprising us every day when we hear about them or even look at them. The computers and computer’s technology revolutionize the world and the way of life. Since the beginning in the 50’s, every new achievement in this section was accepted by the vast masses of people which were expecting new improvements with huge hope for making business and life easier and more successful. In this century, the computers rule the world. Beginning from the first computer ENIAC, which proportions were huge, the technology came up with microchips, tiny devices which are hundred times smaller then the basic of the structure of ENIAC, the electronic tube. The technology of creating microchips, allows us to create smaller devices like CPU’s, Integrated Circuits, Microcontrollers, and so on…
From other side, the classic science in the same time was making very important researches and discoveries, especially physics. The physicist discovered laser rays and sensors of the same rays, which are getting more sophisticated and more powerful.
If we put these two parts of science in one, we will have more than hundred products which are making our life easier, more successful and more secured. Products like this are IR, Bluetooth transmitters and receivers, optical mouse, LCD Projectors, Large Video Beams and the latest gadget of the technology called Virtual Laser Keyboard. This non-physical keyboard is implementing optics from physics and microcontrollers form electronics and programming. The main difference is that the Virtual Laser Keyboard physically is not present. An optical virtual keyboard has been invented by IBM engineers in 1992.
WHAT IS A VIRTUAL LASER KEYBOARD
A virtual keyboard is actually a key-in device, roughly a size of a fountain pen, which uses highly advanced laser technology, to project a full sized keyboard on to a flat surface. Since the invention of computers they had undergone rapid miniaturization. Disks and components grew smaller in size, but only component remained same for decades -its keyboard. Since miniaturization of a traditional keyboard is very difficult we go for virtual keyboard. Here, a camera tracks the finger movements of the typist to get the correct keystroke. A virtual keyboard is a keyboard that a user operates by typing on or within a wireless or optical -dectable surface or area rather than by depressing physical keys.
Unlike many small snap-on keyboards for PDAs, the Virtual Laser Keyboard provides a full-size QWERTY keyboard. It is also smaller and more convenient to use than the folding-type keyboards made by some manufacturers and similar to them in functionality. There are no mechanical moving parts whatsoever in the Virtual Laser Keyboard. It provides a projected image that is the perfect portable input device for PDAs. It's similar in responsiveness to regular keyboards.