EYE-CONTROLLED HUMAN COMPUTER INTERFACE USING THE LINE-OF-SIGHT AND THE INTENTIONAL BLINK/

By integrating the eye and head-position monitoring devices, the prese nt authors developed an eye-controlled human/computer interface based on the line-of-sight and an intentional blink to invoke commands. Also modified was an existing calibration method to reduce the visual angl e between the target center and the intersection point of the derived line-of-sight. The reduced visual angle allowed 108 or more command bl ocks to be displayed on the 14 inch monitor with the target acquisitio n probability (hit rate) of 98% when viewed at a distance of 500 mm ap art. This could represent all keys of the standard keyboard on the mon itor. An active triggering method, using an intentional blink, was a f easible and efficient alternative to invoke commands with total trigge ring time of 0.8 s or less. The system could be used by normal people as well as handicapped individuals as a new human/computer interface. Copyright (C) 1996 Elsevier Science Ltd