|dc.description.abstract||Nowadays computer technology is prosperously developed and people enjoy the convenience brought by computers. However, some of the handicapped cannot use their hands to control computers but they still have the need to use them. Although we can create special use computers for these handicapped, they will not be able to afford the high costs because of the small markets. As a result, my research is to develop an eye-writing system of keyboard and mouse in order to help the handicapped be able to use computers.
In this study, I measure the physiological signals by using electro-oculography (EOG). At the first stage, I use a differential amplifier, filters, and a voltage shift control circuit to do the preliminary processing. Then, the signals are transmitted to the microprocessor to be analytic and recognized. Third, the microprocessor changes the recognized results into keyboard/mouse signals and transmits the signals to the PS/2 port of computers. Finally, the EOG signals can take place the manual operation and we can communicate with computers by using EOG signals to control keyboard and mouse.
The sensitivity of the eye-writing system of keyboard is 77.92% and the specificity is 75.27%; the sensitivity of the eye-writing system of mouse is 96.78% and the specificity is 89.39%.
The advantages of this system are high adaptability (alternatively controlling keyboard or mouse), easy to carry, and no need of other interface (using PS/2 port to communicate with computers). In the future work, we can develop other systems to control other objects such as televisions, wheelchairs, and air conditioner by using the similar algorithms.||en_US|