19-09-2012, 11:45 AM
RETINA BASED MOUSE CONTROL
[attachment=34028]
INTRODUCTION
The concept presents a novel idea to control computer
mouse cursor movement with human eyes. In this topic, a working
of the product has been described as to how it helps the special
people share their knowledge with the world. Number of traditional
techniques such as Head and Eye Movement Tracking Systems etc.
exist for cursor control by making use of image processing in which
light is the primary source. Electro-oculography (EOG) is a new
technology to sense eye signals with which the mouse cursor can be
controlled. The signals captured using sensors, are first amplified,
then noise is removed and then digitized, before being transferred to
PC for software interfacing.
HEAD MOVEMENT TRACKING SYSTEM
Head Movement Tracking System is a device that transmits
a signal from top of the computer monitor and tracks a
reflector spot placed on the user's forehead or eyeglasses.
Using only the movement of the user’s head, the movement of the cursor can be controlled, allowing ‘The Head Mouse’ to be used as an ordinary computer mouse .
Eye tracking
Eye tracking is a technology in which a camera or imaging
system visually tracks some features of the eye and then a
computer determines where the user is looking at .
Eye tracking technology can be divided into two areas;
firstly a remote computer-mounted device, in which an IR camera is mounted on a computer screen, secondly a head-mounted device, in which an IR camera is placed on user’s head. This technique is accurate but expensive.
EOG
Electro-oculography (EOG) is a new technology of placing electrodes on user’s forehead around the eyes to record eye movements. EOG is a very small electrical potential that can be detected using electrodes. The majority of the people using
this setup may have severe cerebral palsy or been born with a congenital brain disorder or suffered traumatic brain injury, for example from automobile or drowning accidents. This
technique is adapted because it is inexpensive and accurate
IMPLEMENTATION
Sensing Eye Signals
Due to the higher metabolic rate at the retina compared to the eye maintains a voltage of +0.40 to +1.0 millivolts with respect to the retina.
The potential is about 15-200 micro volts .
To detect vertical motion one electrode is 2cm above and one is 1cm below the left eye.
To detect horizontal motion an electrode is placed outer side of each eye.
RESULT
A Brief Discussions
When eyes move in continuous vertical fashion, the
variations in the output can be seen accordingly.
Because of the positive and negative nature of the
instrumentation amplifier’s input channel, higher value is
achieved when eyes move upward and lower value is achieved
when eyes move downward. Similar would be the case for
right-left movement.
[attachment=34028]
INTRODUCTION
The concept presents a novel idea to control computer
mouse cursor movement with human eyes. In this topic, a working
of the product has been described as to how it helps the special
people share their knowledge with the world. Number of traditional
techniques such as Head and Eye Movement Tracking Systems etc.
exist for cursor control by making use of image processing in which
light is the primary source. Electro-oculography (EOG) is a new
technology to sense eye signals with which the mouse cursor can be
controlled. The signals captured using sensors, are first amplified,
then noise is removed and then digitized, before being transferred to
PC for software interfacing.
HEAD MOVEMENT TRACKING SYSTEM
Head Movement Tracking System is a device that transmits
a signal from top of the computer monitor and tracks a
reflector spot placed on the user's forehead or eyeglasses.
Using only the movement of the user’s head, the movement of the cursor can be controlled, allowing ‘The Head Mouse’ to be used as an ordinary computer mouse .
Eye tracking
Eye tracking is a technology in which a camera or imaging
system visually tracks some features of the eye and then a
computer determines where the user is looking at .
Eye tracking technology can be divided into two areas;
firstly a remote computer-mounted device, in which an IR camera is mounted on a computer screen, secondly a head-mounted device, in which an IR camera is placed on user’s head. This technique is accurate but expensive.
EOG
Electro-oculography (EOG) is a new technology of placing electrodes on user’s forehead around the eyes to record eye movements. EOG is a very small electrical potential that can be detected using electrodes. The majority of the people using
this setup may have severe cerebral palsy or been born with a congenital brain disorder or suffered traumatic brain injury, for example from automobile or drowning accidents. This
technique is adapted because it is inexpensive and accurate
IMPLEMENTATION
Sensing Eye Signals
Due to the higher metabolic rate at the retina compared to the eye maintains a voltage of +0.40 to +1.0 millivolts with respect to the retina.
The potential is about 15-200 micro volts .
To detect vertical motion one electrode is 2cm above and one is 1cm below the left eye.
To detect horizontal motion an electrode is placed outer side of each eye.
RESULT
A Brief Discussions
When eyes move in continuous vertical fashion, the
variations in the output can be seen accordingly.
Because of the positive and negative nature of the
instrumentation amplifier’s input channel, higher value is
achieved when eyes move upward and lower value is achieved
when eyes move downward. Similar would be the case for
right-left movement.