2. Abstract
•The Eye gaze System is a communication
system for people with complex physical
disabilities.
•This operates with eyes by looking at
control keys displayed on a screen.
•With this system a person can synthesize
speech, control his environment , operate
a telephone, run computer software,
operate a computer mouse, and access
the Internet and e-mail.
3. Contents
Introduction
Users of the eye gaze system
Working
Running
Functionalities
Operational environment
Advancements
Future Work
Conclusion
4. Introduction
The Eye gaze System is a direct-select vision-
controlled communication and control system.
5. • Edmund Huey built an early eye tracker, using
a sort of contact lens with a hole for the pupil.
The lens was connected to an aluminum
pointer that moved in response to the
movement of the eye
•It was developed in Fairfax, Virginia, by LC
Technologies, Inc.,
•With the help of an eye gaze system,
people whose communication abilities are
impaired can still express their feelings and
needs with a limitless vocabulary.
7. •This system is mainly developed for those who lack the
use of their hands or voice
•Its users are adults and children with cerebral palsy,
spinal cord injuries, brain injuries, ALS, multiple sclerosis,
brainstem strokes
8. Skills needed by the users
• Good control of one eye
• Adequate vision
• Ability to maintain a position in
front of the Eye gaze monitor
20. Operational environment
•The Eyegaze System must be
operated in an environment
where there is limited of
infrared light.
•The System works best away
from windows, and in a room
lit with fluorescent or mercury-
vapor lights, which are low in
infrared.
21. SOME OF THE PRESENT DAY EYE GAZE
TRACKING TECHNIQUES
•Offer an unobstructed field of view with good access to
the face and head.
•Make no contact with the subject.
•Be easily extended to binocular recording
•Be compatible with head and body recordings
•Be easy to use on a variety of subjects.
23. IntelliGaze IG-30
•It is a sophisticated system with a high tracking rate and
excellent working range.
• It can accommodate rapid or involuntary head
movements
•Intelligaze uses the latest camera
technology, very sophisticated image
processing and calibration methods
24. For people with limited eye control
Scanning Keyboard is the new row/column
keyboard with an on- screen eye "switch" for
people with limited eye movement.
25. Some of the common eye movement problems
that interfere with Eyegaze use are
•Nystagmus - constant, involuntary movement of
the eyeball
•Alternating strabismus - eyes cannot be directed
to the same object, either one deviates
26. The common vision problems are
•Inadequate Visual acuity
•Diplopia (double vision)
•Blurred vision
•Cataracts (clouding of the
lens of the eye)
27. Mental abilities that improve the
probability for successful Eyegaze use
•Ability to read
•Cognition
•Memory
29. FUTURE WORK
The Eye gaze System’s Eyefollower2.0
•Totally Free Head Motion
•Automatic Eye Acquisition
•Binocular Eye tracking
•High Gaze point Tracking Accuracy
•Easy User Calibration
30. CONCLUSION
•Today, the human eye-gaze can be recorded by
relatively unremarkable techniques. This thesis argues
that it is possible to use the eye-gaze of a computer user
in the interface to aid the control of the application.
•Care must be taken, though, that eye-gaze tracking data
is used in a sensible way, since the nature of human
eye-movements is a combination of several voluntary
and involuntary cognitive processes.
