Eye Movement Communication Control System Based on EOG and Voluntary Eye Blink
A communication support interface controlled by eye movements and voluntary eye blink has been developed for disabled individuals with motor paralysis who cannot speak. Horizontal and vertical electro-oculograms were measured using two surface electrodes attached above and beside the dominant eye and referring to an earlobe electrode and amplified with AC-coupling in order to reduce the unnecessary drift. Four directional cursor movements —up, down, right, and left— and one selected operation were realized by logically combining the two detected channel signals based on threshold settings specific to the individual. Letter input experiments were conducted on a virtual screen keyboard. As a result, operatablility, accuracy, and processing speed were improved using our method.
KeywordsAmyotrophic Lateral Sclerosis Processing Speed Amyotrophic Lateral Sclerosis Patient Motor Paralysis Communication Support System
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