Due to the inherent speed-accuracy trade-off constraint in stylus typing, users tend to miss the targeted keys, resulting in erroneous words. We present a pattern matching based error tolerance method for stylus keyboards. We view the hit points on a stylus keyboard as a high resolution geometric pattern. This pattern can be matched against patterns formed by the letter key positions of legitimate words from a lexicon. By finding the closest matching word, erroneous taps can be corrected. We present the rationale, a geometrical pattern matching algorithm, and the key aspects of our implementation of an Elastic Stylus Keyboard (ESK).
By: Per-Ola Kristensson, Shumin Zhai
Published in: RJ10323 in 2004
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