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Eye Tracking

            New eye tracking techniques improve realism of aircraft.
             A simulated flight environment for pilot training may soon .
             be made more realistic through the use of eye-tracking .
             technology developed by researchers at the University of .
             Toronto's Institute of Biomedical Engineering (IMBE). .
             Many safety and cost benefits are obtained by training aircraft .
             pilots under simulated conditions, but to be effective the .
             simulation must be convicingly realistic. At present, the .
             training facilities use large domes and gimballed projectors, or .
             an array of video screens, to display computer-generated images. .
             But these installations are very expensive and image resolution .
             is low. Further, it would take an enormous amount of addi to .
             improve image quality significantly throughout the whole viewed .
             scene. .
             However, based on the visual properties of the eye, realism can .
             be obtained by providing a high-resolution 'area of interest' .
             insert within a large, low-resolution field of view. If the .
             image-generating computer 'knows' where the pilot's fixation is, .
             it mage there. .
             The technology to make this possible was developed by a research .
             team headed by Professor Richard Frecker and Professor Moshe .
             Eizenman. The work was carried out in collaboration with CAE .
             Electronics Ltd. of Montreal with financial support from the .
             Natural Sciences and Engineering Research Council of Canada. .
             Their eye-tracker can record and analyze accurately up to 500 eye .
             positions per second. The system works by means of capturing and .
             processing the reflections of a low-level beam of invisible .
             infra-red light shone onto the eye. .
             Multi-element arrays capture the image of the eye and digitize .
             the information, which is then processed in real time by a fast, .
             dedicated signal processing unit. The difference in position .
             between the ligh tre of the pupil reveals the instantaneous .
             direction of gaze. .
             Developments by the IBME team have significantly increased the .

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