A new coding technique for EOG based writing systems

In this study, a new method, which uses fewer eye movements according to similar systems in character coding, was proposed for eye writing system. Vertical and horizontal electrooculogram (EOG) signals were used for coding the 42 different characters consist of letters, numbers, and punctuation. The efficiency of the method was primarily showed by computer simulations. Afterwards, it was tested with real EOG signals taken from three volunteers. It was seen that, when the same control parameters are used for all volunteers, the character recognition algorithm provides 77% accuracy. If volunteer specific changes are applied at control parameters, the algorithm provides 100% accuracy.