Design of a Novel Wearable Human Computer Interface based on Electrooculograghy

People with severe motor disabilities are not able to move their limbs voluntarily and speech overtly, though the cognitive parts of their brain are intact. Human computerinterfaces, as an assistive technology, provide a new channel of communication to help these people. In this study, a novelwearable miniaturized human computer interface system was designed and tested allowing these people to state their intentions and feelings just by using their eyes. The system thatcan be installed on glasses, records the electrooculogram signal and transfers the digitized data wirelessly to a laptop. By analyzing the signals, eight directions of eye movements consist of up, down, right, left and four diagonal directions, as well asthe voluntary blinking were recognized and used in a high performance graphical user interface to type alphabetical letters and numbers, just by two moves and two selections. Twoexperiments were conducted to evaluate the performance of the developed system. Precision, sensitivity and accuracy ofrecognizing the user intention were obtained 95%, 98% and 93% respectively and the average rate of communication was5.88 character per minute. This low-cost wearable device is light-weight with small size which assures high level of mobility and comfort. The users could learn to type with the system in a short time, and easily work with it without fatigue

کلیدواژه ها:

Assistive Technology ، Electrooculograghy ، Human Computer Interface ، Disabled People