Eye-Swipe Typing Using Integration of Dwell-Time and Dwell-Free Method

Computer becomes a part of human in learning and it can be used to type text entries using finger typing. However, handicapped people cannot type any text. Therefore, typing using eye movement is developed as an assistive technology for physically disabled people. Eye-swipe typing is a kind of on-screen keyboard that allows users to swipe through the first until the last letter of word using their eye gaze. Previous researchers implemented dwell-time method to select letter-by-letter. Then other researchers proposed dwell-free method to fasten typing. In this paper, combination of dwell-time and dwell-free method is proposed in order to achieve accuracy in typing. Edit distance algorithm is revised with neighbor weight to handle with neighbor-letter error from imperfect calibration of eye tracker. Then, number of word frequency and ratio of matching letters from edit distance of scan-path word with each word in database will be considered as score ranking. Words with top-5 score ranking will be recommended as candidate words.