eye-gaze ppt

EYE-GAZE COMMUNICATION: 

EYE-GAZE COMMUNICATION

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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.

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Contents Introduction Users of the eye gaze system Working Running Functionalities Operational environment Advancements Future Work Conclusion

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Introduction The Eye gaze System is a direct-select vision-controlled communication and control system.

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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 .

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Who uses the eye gaze system?

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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

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Skills needed by the users Good control of one eye Adequate vision Ability to maintain a position in front of the Eye gaze monitor

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Parts of the eye gaze system

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Working of the eye gaze system

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How can we run this eye gaze?

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Calibrate Typewrite Read Text Entertain with games Teach Screens The Basic Eye gaze can

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With Options The Eye gaze Can BE AT TWO SITES!! BE A KEYBOARD SPEAK through a speech synthesizer CONTROL appliances DIAL and answer a phone

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The Phrase Program

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The telephone program

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Run Second PC As a keyboard

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As a mouse controller

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The Lights & appliances Program

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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.

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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.

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Advancements New portable eye gaze systems

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It is a sophisticated system with a high tracking rate and excellent working range. It can accommodate rapid or involuntary head movements IntelliGaze IG-30 Intelligaze uses the latest camera technology, very sophisticated image processing and calibration methods

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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.

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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

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The common vision problems are Inadequate Visual acuity Diplopia (double vision) Blurred vision Cataracts (clouding of the lens of the eye)

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Mental abilities that improve the probability for successful Eyegaze use Ability to read Cognition Memory

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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

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FUTURE WORK Totally Free Head Motion Automatic Eye Acquisition Binocular Eye tracking High Gaze point Tracking Accuracy Easy User Calibration The Eye gaze System’s Eyefollower2.0

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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.