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.
Contents Introduction Users of the eye gaze system Working Running Functionalities Operational environment Advancements Future Work Conclusion
IntroductionThe Eye gaze System is a direct-select vision-controlled communication and control system.
• Edmund Huey built an early eye tracker, usinga sort of contact lens with a hole for the pupil.The lens was connected to an aluminumpointer that moved in response to themovement 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.
•This system is mainly developed for those who lack theuse of their hands or voice•Its users are adults and children with cerebral palsy,spinal cord injuries, brain injuries, ALS, multiple sclerosis,brainstem strokes
Skills needed by the users • Good control of one eye • Adequate vision • Ability to maintain a position in front of the Eye gaze monitor
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.
SOME OF THE PRESENT DAY EYE GAZE TRACKING TECHNIQUES•Offer an unobstructed field of view with good access tothe 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.
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
For people with limited eye controlScanning Keyboard is the new row/columnkeyboard with an on- screen eye "switch" forpeople with limited eye movement.
Some of the common eye movement problemsthat interfere with Eyegaze use are•Nystagmus - constant, involuntary movement ofthe eyeball•Alternating strabismus - eyes cannot be directedto the same object, either one deviates
The common vision problems are •Inadequate Visual acuity •Diplopia (double vision) •Blurred vision •Cataracts (clouding of the lens of the eye)
Mental abilities that improve theprobability for successful Eyegaze use •Ability to read •Cognition •Memory
Applications•Neurosciences /Neuropsychology•Vision Research•Experimental Psychology•Cognitive Psychology•Psycholinguistics•Psychiatry /Mental Health•Transportation: Flight simulators /driving simulators•Robotics - remote vision control•Video and arcade games
FUTURE WORKThe Eye gaze System’s Eyefollower2.0 •Totally Free Head Motion •Automatic Eye Acquisition •Binocular Eye tracking •High Gaze point Tracking Accuracy •Easy User Calibration
CONCLUSION•Today, the human eye-gaze can be recorded byrelatively unremarkable techniques. This thesis arguesthat it is possible to use the eye-gaze of a computer userin the interface to aid the control of the application.•Care must be taken, though, that eye-gaze tracking datais used in a sensible way, since the nature of humaneye-movements is a combination of several voluntaryand involuntary cognitive processes.